مقالات علمی چاپ شده در مجلات

1. "Mismatch error shaping of DAC unit elements in 2 multi-bit ? ? modulators using a novel unified ADC/DAC"
   Leila Sharifi, Omid Hashemipour tafreshi
   Turkish Journal of Electrical Engineering and Computer Sciences,
2. "A Novel Rail-to-Rail Input Swing Threshold-Inverter Multi-Bit Quantizer Using Interpolation Technique for Sampled-Data Circuits"
   Amir Hossein Miremadi, Omid Hashemipour tafreshi
   JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS, Vol. 31, 2022
3. "A scalable high-linearity two-step DTC-assisted voltage-to-time converter with rail-to-rail input-range for time-based circuits"
   Amir Hossein Miremadi, Omid Hashemipour tafreshi
   AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, Vol. 128, 2021
4. "Digital Assisted Truncation Noise Shaping Technique for Multi-bit ?? Modulators"
   Leila Sharifi, Omid Hashemipour tafreshi
   ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING, Vol. 46, pp.1279-1286, 2021
5. "A charge sharing-based switching scheme for SAR ADCs"
   Meysam Akbari, Omid Hashemipour tafreshi, Masoud Nazari, Farshad Moradi
   INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS, Vol. 47, pp.1188-1198, 2019
6. "A simple and high performance charge pump based on the self-cascode transistor"
   Mohsen Karbalaei MohammadAli, Omid Hashemipour tafreshi
   ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, Vol. 100, pp.633-638, 2019
7. "Fast locking technique for phase locked loop based on phase error cancellation"
   Mohsen Karbalaei MohammadAli, Omid Hashemipour tafreshi
   AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, Vol. 109, pp.99-106, 2019
8. "An 8-Bit Ultra-Low-Power, Low-Voltage Current Steering DAC Utilizing a New Segment Structure"
   Mehdi Bandali, Alireza Hassanzadeh, Masume Ghashghai, Omid Hashemipour tafreshi
   JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS, Vol. 28, 2018
9. "Input Offset Estimation of CMOS Integrated Circuits in Weak Inversion"
   Meysam Akbari, Omid Hashemipour tafreshi, Farshad Moradi
   IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, Vol. 26, pp.1812-1816, 2018
10. "A super class-AB adaptive biasing amplifier in 65-nm CMOS technology"
    Meysam Akbari, Omid Hashemipour tafreshi
    International Journal of Electronics Letters, Vol. 6, pp.302-314, 2018
11. "Design of active inductor-based current-controlled oscillators using gm/Id methodology"
    Mohammad Samiei, Omid Hashemipour tafreshi
    AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, Vol. 87, pp.1-9, 2018
12. "A novel design of a ternary coded decimal adder/subtractor using reversible ternary gates"
    Mohammad Mehdi Panahi, Omid Hashemipour tafreshi, Keyvan Navi
    INTEGRATION-THE VLSI JOURNAL, Vol. 62, pp.353-361, 2018
13. "An energy-efficient DAC switching algorithm based on charge recycling method for SAR ADCs"
    Meysam Akbari, Omid Hashemipour tafreshi, Fabian Khateb, Farshad Moradi
    MICROELECTRONICS JOURNAL, Vol. 82, pp.29-35, 2018
14. "Design and Analysis of an Ultra-Low-Power Second-Order Asynchronous DeltaSigma Modulator"
    Meysam Akbari, Omid Hashemipour tafreshi, Farshad Moradi
    CIRCUITS SYSTEMS AND SIGNAL PROCESSING, Vol. 36, pp.4919-4936, 2017
15. "Two-Dimensional Structure Compatible with DEM Methods Utilizing in DACs"
    Mehdi Bandali, Omid Hashemipour tafreshi
    JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS, Vol. 27, pp.1850142-1850155, 2017
16. "An efficient approach to enhance bulk-driven amplifiers"
    Meysam Akbari, Omid Hashemipour tafreshi, Mohammad Hossein Moaiyeri, Armin Aghajani
    ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, Vol. 92, pp.489-499, 2017
17. "Low Power Current Conveyor Based Continuous Time Sigma Delta Modulator"
    Reza Chavooshi Sani, Omid Hashemipour tafreshi
    Journal of Low Power Electronics, Vol. 13, pp.249-254, 2017
18. "A 63-dB gain OTA operating in subthreshold with 20-nW power consumption"
    Meysam Akbari, Omid Hashemipour tafreshi
    INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS, Vol. 45, pp.843-850, 2017
19. "A Class-AB Bulk-Driven Amplifier with Enhanced Transconductance Using Quasi-Floating Gate Method"
    Meysam Akbari, Omid Hashemipour tafreshi
    JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS, Vol. 27, pp.1850137-1850146, 2017
20. "Slew rate boosting technique for an upgraded transconductance amplifier"
    Meysam Akbari, Alireza Hassanzadeh, Omid Hashemipour tafreshi
    ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, Vol. 10, 2016
21. "Ultrathin buffer layer at organic/organic interface for managing the recombination profile in organic light-emitting diodes Metal versus dielectric buffer"
    Davood Kalhor, Ezeddin Mohajerani, Omid Hashemipour tafreshi, , Mohsen Shojaefar,
    JOURNAL OF APPLIED POLYMER SCIENCE, Vol. 133, 2016
22. "Multi-Path Class AB Operational Amplifier with High Performance for SC Circuits"
    Meysam Akbari, Omid Hashemipour tafreshi
    JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS, Vol. 25, 2016
23. "Efficient Radix-r Adders for Nanoelectronics"
    Mohammad Hossein Moaiyeri, Reza Chavooshi Sani, Ali Jalali, Keyvan Navi, Omid Hashemipour tafreshi
    INTERNATIONAL JOURNAL OF ELECTRONICS, Vol. 103, pp.281-296, 2016
24. "Improving power efficiency of a two-stage operational amplifier for biomedical applications"
    Maisam Akbari, Masoud Nazari, Leila Sharifi, Omid Hashemipour tafreshi
    ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, Vol. 84, pp.173-183, 2015
25. "High Gain and High CMRR Two-Stage Folded Cascode OTA with Nested Miller Compensation"
    Meysam Akbari, Omid Hashemipour tafreshi
    JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS, Vol. 24, pp.1550057-1550080, 2015
26. "High speed switched-current memory cell with very low offset and charge injection errors"
    Sajad Shahsavari, Sadegh Biabanifard Hosein Abadi, Omid Hashemipour tafreshi
    AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, Vol. 69, pp.1627-1634, 2015
27. "A 0.6-V 0.4- W bulk-driven operational amplifier with rail-to-rail input/output swing"
    Meysam Akbari, Omid Hashemipour tafreshi
    ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, Vol. 85, pp.481-491, 2015
28. "DCCII based frequency compensation method for three stage amplifiers"
    Mohammad amin Shahrivari, Sadegh Biabanifard Hosein Abadi, S. Mehdi Hosseini Largani, Omid Hashemipour tafreshi
    AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, Vol. 69, pp.176-181, 2015
29. "A High-Performance Low-Voltage Current-Mode Min/Max Circuit"
    Reza Chavooshi Sani, Mohammad Hossein Moaiyeri, Omid Hashemipour tafreshi
    COMPEL-THE INTERNATIONAL JOURNAL FOR COMPUTATION AND MATHEMATICS IN ELECTRICAL AND ELECTRONIC ENGINEERING, Vol. 33, pp.1172-1183, 2015
30. "Design and analysis of folded cascode OTAs using Gm/Id methodology based on flicker noise reduction"
    Maisam Akbari, Omid Hashemipour tafreshi
    ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, Vol. 83, pp.343-352, 2015
31. "Systematic design of analog integrated circuits using ant colony algorithm based on noise optimization"
    Meysam Akbari, Mohammad Shokouhifar, Omid Hashemipour tafreshi, Ali Jalali, Alireza Hassanzadeh
    ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, Vol. 86, pp.327-339, 2015
32. "An 8-Bit Unified Segmented Current-Steering Digital-to-Analog Converter"
    Leila Sharifi, Masoud Nazari, Meysam Akbari, Omid Hashemipour tafreshi
    ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING, Vol. 35, pp.1000-1012, 2015
33. "Design of a 10-Bit High Performance Current-Steering DAC with a Novel Nested Decoder Based on Domino Logic"
    Masoud Nazari, Leila Sharifi, Meysam Akbari, Omid Hashemipour tafreshi
    JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS, Vol. 24, pp.1550086-1550109, 2015
34. "The effect of Indium metal nanoparticles on the electronic properties of organic light emitting diodes (OLEDs)"
    Davood Kalhor, Ezeddin Mohajerani, Omid Hashemipour tafreshi
    JOURNAL OF LUMINESCENCE, Vol. 167, pp.376-380, 2015
35. "A SAR-based RD modulator using shared DAC"
    Shahbaz Zohr Reyhani, Omid Hashemipour tafreshi
    ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, Vol. 79, pp.1-10, 2014
36. "An Efficient Versatile Logic Cell for Single-Electron Technology"
    , Mohammad Hossein Moaiyeri, Keyvan Navi, Omid Hashemipour tafreshi
    Quantum Matter, Vol. 3, pp.57-60, 2014
37. "Enhancing transconductance of ultra-low-power two-stage folded cascode OTA"
    Maisam Akbari, Omid Hashemipour tafreshi
    ELECTRONICS LETTERS, Vol. 50, pp.1514-1516, 2014
38. "SAR-based delta sigma modulator using single-bit shared-DAC"
    Shahbaz Zohr Reyhani, Omid Hashemipour tafreshi
    ELECTRONICS LETTERS, Vol. 25, pp.23-24, 2014
39. "CNTFET-based Designs of Energy-efficient and Symmetric 3-input Exclusive-OR and Full Adder Circuits"
    , , Mohammad Hossein Moaiyeri, Keyvan Navi, Omid Hashemipour tafreshi
    ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING, Vol. 12, pp.3367-3382, 2013
40. "A universal method for designing low-power carbon nanotube FET-based multiple-valued logic circuits"
    Mohammad Hossein Moaiyeri, , Akbar Dosetaregan, Keyvan Navi, Omid Hashemipour tafreshi
    IET Computers and Digital Techniques, Vol. 7, pp.167-181, 2013
41. "Efficient Single-Electron Transistor Inverter-Based Logic Circuits and Memory Elements"
    , Mohammad Hossein Moaiyeri, Keyvan Navi, Omid Hashemipour tafreshi
    JOURNAL OF COMPUTATIONAL AND THEORETICAL NANOSCIENCE, Vol. 10, pp.1171-1178, 2013
42. "Efficient CNFET-based Rectifiers for Nanoelectronics"
    , Keyvan Navi, Omid Hashemipour tafreshi
    International Journal of Computer Applications, Vol. 64, pp.21-25, 2013
43. "High-performance Mixed-Mode Universal Min-Max Circuits for Nanotechnology"
    Mohammad Hossein Moaiyeri, Reza Chavooshisani, Ali Jalali, Keyvan Navi, Omid Hashemipour tafreshi
    CIRCUITS SYSTEMS AND SIGNAL PROCESSING, Vol. 31, pp.465-488, 2012
44. "a new simple method for analysing of thermal noise in switched-capacitor filters"
    , , Omid Hashemipour tafreshi
    INTERNATIONAL JOURNAL OF ELECTRONICS, pp.1729-1737, 2012
45. "A High-Performance Hybrid Molecular Full Adder Cell"
    Keyvan Navi, , , Omid Hashemipour tafreshi
    International Review of PHYSICS (MSRT BLACKLIST), Vol. 6, pp.344-348, 2012
46. "A new systematic design approach for low-power analog integrated circuits"
    , Omid Hashemipour tafreshi, Keyvan Navi
    AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, pp.384-389, 2012
47. "Design and Evaluation of CNFET-based Quaternary Circuits"
    Mohammad Hossein Moaiyeri, Keyvan Navi, Omid Hashemipour tafreshi
    CIRCUITS SYSTEMS AND SIGNAL PROCESSING, Vol. 31, pp.1631-1652, 2012
48. "A low-variation on resistance CMOS sampling switch for high-speed high-performance applications"
    Omid Hashemipour tafreshi, Mohammadreza Asgari
    IEICE ELECTRONICS EXPRESS (MSRT BLACKLIST), Vol. 9, pp.339-345, 2012
49. "Efficient CNTFET based Ternary Full Adder Cells for Nanoelectronics"
    Mohammad Hossein Moaiyeri, Reza Faghih Mirzaee, Keyvan Navi, Omid Hashemipour tafreshi
    Nano-Micro Letters, Vol. 3, pp.43-50, 2011
50. "A hardware-friendly arithmetic method and efficient implementations for designing digital fuzzy adders"
    Keyvan Navi, Akbar Dosetaregan, , Omid Hashemipour tafreshi
    FUZZY SETS AND SYSTEMS, Vol. 185, pp.111-124, 2011
51. "Differential current conveyor based current comparator"
    Reza Chavooshisani, Omid Hashemipour tafreshi
    AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, pp.949-953, 2011
52. "Efficient CNTFET-based Ternary Full Adder Cells for Nanoelectronics"
    , Mohammad Mehdi Faghih, Keyvan Navi, Omid Hashemipour tafreshi
    JOURNAL NANO MICRO LETTERS, Vol. 3, pp.43-50, 2011
53. "High Dynamic Range RNS Bases for Modular Multiplication"
    , , , Keyvan Navi, Omid Hashemipour tafreshi
    international journal of computer science issues (IJCSI), Vol. 8, pp.69-73, 2011
54. "Four Moduli RNS Bases for Efficient Design of Modular Multiplication"
    , , , Keyvan Navi, Omid Hashemipour tafreshi
    journal of computations and modeling (JCoMod), Vol. 1, pp.73-96, 2011
55. "a high speed current conveyor based current comparator"
    Reza Chavooshisani, Omid Hashemipour tafreshi
    MICROELECTRONICS JOURNAL, Vol. 42, pp.28-32, 2011
56. "body effect compensation of analog awitches using variable voltage function"
    Omid Hashemipour tafreshi,
    IEICE ELECTRONICS EXPRESS (MSRT BLACKLIST), Vol. 8, 2011
57. "a new switched opamp approach for improving the operation of auto-reset switched-capacitor filters"
    Mohammad Rashtian, Omid Hashemipour tafreshi, Keyvan Navi, Ali Jalali
    JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS, Vol. 20, pp.835-848, 2011
58. "high speed capacitor -inverter based carbon nanotube full adder"
    Keyvan Navi, , , , Omid Hashemipour tafreshi
    Nanoscale Research Letters, Vol. 5, pp.859-862, 2010
59. "five new mvl current mode differential absolute valve circuits based on carbon nano-tube field effect transistors (cntfets)"
    , Fazel Sharifi rostam abadi, Keyvan Navi, Omid Hashemipour tafreshi
    JOURNAL NANO MICRO LETTERS, Vol. 2, 2010
60. "a simple time domain approach to noise anaalysis of switched capacitor circuits"
    Omid Hashemipour tafreshi, Mohammad Rashtian, Afshin Hemmatyar
    IEICE ELECTRONICS EXPRESS (MSRT BLACKLIST), Vol. 7, 2010
61. "A NOVEL STRUCTURE FOR REALIZATION OF A PSEUDO TWO PATH BAND-PASS FILTER"
    , Omid Hashemipour tafreshi, Keyvan Navi, Ali Jalali
    International Journal of Engineering, Vol. 23, pp.201-208, 2010
62. "Two new low-power full adders based on mafority-not gates"
    Keyvan Navi, , , Omid Hashemipour tafreshi, Babak Mazloomnejad Meybodi
    MICROELECTRONICS JOURNAL, Vol. 40, pp.126-130, 2009
63. "an energy efficient full adder cell for low voltage"
    Keyvan Navi, mehrdad maeen, Omid Hashemipour tafreshi
    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES, Vol. 6, pp.553-559, 2009
64. "Ultra high speed full adders"
    Keyvan Navi, , Masoud Moayeri, Babak Mazloomnejad Meybodi, Omid Hashemipour tafreshi
    IEICE ELECTRONICS EXPRESS (MSRT BLACKLIST), Vol. 5, pp.744-749, 2008
65. "An efficient architecture for designing reverse converters based on a general"
    Keyvan Navi, , Omid Hashemipour tafreshi, Ali Jalali
    JOURNAL OF SYSTEMS ARCHITECTURE, Vol. 54, pp.929-934, 2008
66. "An efficient architecture for designing reverse converters based on a general three-moduli set"
    , Keyvan Navi, Omid Hashemipour tafreshi, Ali Jalali
    JOURNAL OF SYSTEMS ARCHITECTURE, Vol. 54, pp.929-934, 2008
67. "A low voltage bootstrapped switch based on zero DC offset input voltage"
    Alihosein Sepahvand, Omid Hashemipour tafreshi
    IEICE ELECTRONICS EXPRESS (MSRT BLACKLIST), Vol. 5, pp.932-935, 2008
68. "Design of a novel reversible multiplier circuit using HNG gate in nonotechnology"
    Majid Haghparast, , Omid Hashemipour tafreshi, Keyvan Navi
    WORLD APPLIED SCIENCES JOURNAL, Vol. 3, pp.974-978, 2008
69. "A six transistors full adder"
    Keyvan Navi, , Babak Mazloomnejad Meybodi, , Omid Hashemipour tafreshi
    WORLD APPLIED SCIENCES JOURNAL, Vol. 4, pp.142-149, 2008
70. "High Speed Full Swing Current Mode Bicmos Logical Operators"
    Keyvan Navi, , Omid Hashemipour tafreshi
    International journal of electronics Transaction A Basics, Vol. 20, 2007
71. "A Self-Tunable Sensorless Method for Rotor Position Detection in Switched Reluctance Motor Drive"
    Seyed ebrahim Afjei, Omid Hashemipour tafreshi, ,
    Iranian Journal of Science and Technology Transaction B-Engineering, Vol. 31, pp.317-328, 2007
72. "A New Hybrid Brushless dc Motor / Generator without Permanent Magnet"
    Seyed ebrahim Afjei, Omid Hashemipour tafreshi, M.A Saati, M.M nezamabadi
    International Journal of Engineering, Vol. 20, pp.77-86, 2007
73. "A 1.5V 100MS/s 12-bit Current-mode CMOS Sample-and-Hold Circuit"
    Omid Hashemipour tafreshi,
    WORLD ENFORMATIKA SOCIETY, Vol. 4, pp.128-131, 2006
74. "A very low voltage 9th order linear phase Baseband Switched Capacitor filter"
    Omid Hashemipour tafreshi
    International Journal of Engineering, Vol. 17, pp.25-28, 2004
75. "Dopant Deactivation and annealing characteristics of MOS structure on Ge/B doped Si after Gamma irradiation or Fowler-Nordheim charge injection"
    Omid Hashemipour tafreshi, s.s Ang
    JOURNAL OF APPLIED PHYSICS, Vol. 3, pp.1517-1521, 1991
76. "Metal-Oxide-Semiconductor structure on germanium/boron doped silicon"
    Omid Hashemipour tafreshi, s.s Ang
    JOURNAL OF APPLIED PHYSICS, Vol. 9, pp.4647-4651, 1990
77. "طراحی یک فیلتر پایین گذر چبی شف درجه چهارم سوییچ خازنی با ساختار انتگرال گیر خود صفر شونده در ولتاژ تغذیه 2/1 ولت"
    امید هاشمی پورتفرشی، محمد رشتیان، کیوان ناوی
    مهندسی برق و مهندسی کامپیوتر ایران، نسخه 3، صفحات:178-182، 1385

مقالات علمی ارائه شده در همایش‌ها

1. "multi bit quantizer delta-sigma modulator with the feedback dac mismatch error shaping"
   Leila Sharifi, Omid Hashemipour tafreshi
   27th Iranian Conference on Electrical Engineering ICEE2019, 2019
2. "A High Slew Rate CMOS OTA with Dynamic Current Boosting Paths"
   Meysam Akbari, Omid Hashemipour tafreshi, farshad moradi
   2018 IEEE International Symposium on Circuits and Systems (ISCAS), 2018
3. "Dramatically Low-Transistor-Count High-Speed Ternary Adders"
   Mohammad Hossein Moaiyeri, Keyvan Navi, Omid Hashemipour tafreshi
   IEEE International Symposium on Multiple-Valued Logic (ISMVL), pp.170-175, 2013
4. "On the design of new low-power CMOS standard ternary logic gates"
   Akbar Dosetaregan, Mohammad Hossein Moaiyeri, Keyvan Navi, Omid Hashemipour tafreshi
   CSI Internationa Symposium on Computer Architecture and Digital Systems(CADS), pp.115-120, 2010
5. "A novel structure for realization of a pseudo two path band-pass filter"
   Omid Hashemipour tafreshi, Keyvan Navi
   2008 26th international conference on microelectronics, 2008
6. "A New Hybrid Reluctance Motor/Field-Assisted Generator"
   Seyed ebrahim Afjei, Omid Hashemipour tafreshi,
   IEEE International Electric Machines Drives Conference 2007. IEMDC 07, pp.543-547, 2007
7. "A high precision cmos bandgap reference based on curvature correction circuit"
   میثم اکبری، امید هاشمی پورتفرشی
   سومین همایش بین المللی مهندسی برق، علوم کامپیوتر و فناوری اطلاعات، صفحات:4-8، 1397
8. "A 12-bit high performance current-steering DAC using a new binary to thermometer decoder"
   مسعود نظری، لیلا شریفی، آرمین آقاجانی، امید هاشمی پورتفرشی
   بیست و چهارمین کنفرانس مهندسی برق ایران، صفحات:1919-1924، 1395
9. "Design of a new split-capacitive-array based on distribution of attenuation capacitor"
   مسعود نظری، آرمین آقاجانی، امید هاشمی پورتفرشی
   بیست و سومین کنفرانس مهندسی برق ایران، صفحات:1370-1373، 1394
10. "An ultra-low voltage ultra-low power fully recycling folded cascode amplifier"
    میثم اکبری، امید هاشمی پورتفرشی، اردوان جاوید
    بیست و دومین کنفرانس مهندسی برق ایرانICEE2014، صفحات:514-518، 1393
11. "Design of Ultra-Low-Power CMOS Amplifiers Based on Flicker Noise Reduction"
    میثم اکبری، صادق بیابانی فردحسین آبادی، امید هاشمی پورتفرشی
    بیست و دومین کنفرانس مهندسی برق ایرانICEE2014، صفحات:403-406، 1393
12. "A reliable full-swing low-distortion cmos bootstrapped sampling switch"
    محمدرضا عسگری، سید حسین پیشگرکومله، امید هاشمی پورتفرشی
    Ieee international conference on electronics circuits and systems(icecs)، صفحات:200-203، 1390
13. "طراحی یک نمونه بردار و نگهدارنده دقیق به کمک تقویت کننده سوییچ شونده"
    محمد رشتیان، امید هاشمی پورتفرشی، کیوان ناوی
    شانزدهمین کنفرانس مهندسی برق ICEE 2008، 1387
14. "یک تقویت کننده عملیاتی جدید با پهنای باند وسیع با فیدبک جریان"
    رضا ملکی قره بلاغ، امید هاشمی پورتفرشی
    شانزدهمین کنفرانس مهندسی برق ICEE 2008، 1387
15. "معکوس کننده های سه مقداری بسیار سریع"
    کیوان ناوی، امید هاشمی پورتفرشی، سعید گرگین
    دوازدهمین کنفرانس بین المللی انجمن کامپیوتر ایران، صفحات:960-967، 1385
16. "معرفی یک ساختار مناسب برای مدارات سویچ خازنی سریع در کارکرد های ولتاژ پایین"
    امید هاشمی پورتفرشی، محمد رشتیان
    کنفرانس بین المللی مهندسی برق ایران، 1385