Pedram Payandehnia
Santa Clara, California, United States
935 followers
500+ connections
Activity
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I'm happy to share that I recently had the opportunity to present my paper, titled, "An Enhanced Eye-Opening PAM-4 with Encoding for Short-Reach…
I'm happy to share that I recently had the opportunity to present my paper, titled, "An Enhanced Eye-Opening PAM-4 with Encoding for Short-Reach…
Liked by Pedram Payandehnia
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It is my great pleasure to share with you that according to the 2023 edition of the Journal Citation Reports (JCR), the Impact Factor (IF) of the…
It is my great pleasure to share with you that according to the 2023 edition of the Journal Citation Reports (JCR), the Impact Factor (IF) of the…
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“What is the first thing someone touches in the morning? For hundreds of millions of people, that’s an iPhone. So, it is pretty crazy and pretty…
“What is the first thing someone touches in the morning? For hundreds of millions of people, that’s an iPhone. So, it is pretty crazy and pretty…
Liked by Pedram Payandehnia
Experience
Education
Publications
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My Publications - Google Scholar Link
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Here you can find the google scholar link to the list of my publications.
Projects
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A Blocker Tolerant CT ΔΣ Modulator with Inherent DWA
The design and implementation of a new blocker tolerant wideband continuous-time delta-sigma modulator is presented. Using a customized digital integrator with inherent data-weighted averaging (DWA) at the back-end of the modulator, the power consumption of the quantizer is reduced while the speed of operation is increased. Additionally, by using a single amplifier biquad (SAB) structure in the loop filter, the number of op-amps is reduced, thus reducing the analog power consumption. Also, the…
The design and implementation of a new blocker tolerant wideband continuous-time delta-sigma modulator is presented. Using a customized digital integrator with inherent data-weighted averaging (DWA) at the back-end of the modulator, the power consumption of the quantizer is reduced while the speed of operation is increased. Additionally, by using a single amplifier biquad (SAB) structure in the loop filter, the number of op-amps is reduced, thus reducing the analog power consumption. Also, the modulator robustness to the out-of-band blocker is improved by increasing the number of levels in the digital integrator and feedback DACs. The out-of-band blocker tolerance is improved by 3 dB compared to a conventional CIFF-B delta-sigma modulator with a minimal increase in the power consumption. The proposed architecture has been implemented in a 65-nm CMOS technology and operates at a 250 MHz sampling frequency. It achieves 73.5 dB SNR, 72.4 dB SNDR, and 92 dB SFDR over a 7 MHz bandwidth and a Walden Figure-of-Merit (FoM) of 341 fJ/conversion.
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A Low Noise Tunable Fourth-Order Low-Pass Filter with Complex Poles
A novel switched-capacitor low-pass filter architecture is presented. In the proposed scheme, a feedback path is added to a charge-rotating real-pole filter to implement
complex poles. The selectivity is enhanced, and the in-band loss is reduced compared with the real-pole filter. The output thermal noise level and the tuning range are both close to those of the real-pole filter. These features make the filter suitable for high speed, low
noise, and low power applications. A…A novel switched-capacitor low-pass filter architecture is presented. In the proposed scheme, a feedback path is added to a charge-rotating real-pole filter to implement
complex poles. The selectivity is enhanced, and the in-band loss is reduced compared with the real-pole filter. The output thermal noise level and the tuning range are both close to those of the real-pole filter. These features make the filter suitable for high speed, low
noise, and low power applications. A fourth-order filter prototype was implemented in a 180-nm CMOS technology. The measured in-band loss is reduced by 3.3 dB compared with that of a real-pole filter. The sampling rate of the filter is programmable from 65 to 300 MS/s with a constant dc gain. The 3-dB cut-off frequency of the filter can be tuned from 490 to 13.3 MHz with over 100-dB maximum stop-band rejection. The measured in-band third-order output intercept point is 28.7 dBm, and the averaged spot noise is 6.54 nV/√Hz. The filter consumes 4.3 mW from a 1.8 V supply. -
Fully Passive Noise Shaping SAR ADC
An opamp-free noise shaping successive-approximation register (SAR) ADC is proposed. Third-order noise shaping is achieved by implementing a second-order passive filter and a passive error feedback topology. In the proposed scheme, the SAR error signals (including quantisation noise, comparator thermal noise, DAC thermal noise and settling error) are subjected to third-order noise shaping. Therefore, the thermal noise specifications of the comparator can be relaxed. Also, since no active…
An opamp-free noise shaping successive-approximation register (SAR) ADC is proposed. Third-order noise shaping is achieved by implementing a second-order passive filter and a passive error feedback topology. In the proposed scheme, the SAR error signals (including quantisation noise, comparator thermal noise, DAC thermal noise and settling error) are subjected to third-order noise shaping. Therefore, the thermal noise specifications of the comparator can be relaxed. Also, since no active element is used, the proposed scheme achieves a higher power efficiency than earlier SAR ADCs.
More activity by Pedram
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I'm getting promoted to Associate Professor effective September 1. This promotion allows me to explore riskier ideas with my brilliant research…
I'm getting promoted to Associate Professor effective September 1. This promotion allows me to explore riskier ideas with my brilliant research…
Liked by Pedram Payandehnia
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I rarely write about the books I read but I just completed Chris Miller’s “Chip War,” and I could not resist writing about it. It is a fascinating…
I rarely write about the books I read but I just completed Chris Miller’s “Chip War,” and I could not resist writing about it. It is a fascinating…
Liked by Pedram Payandehnia
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In the death of Prof. Willy Sansen (April 24, 2024), the analog world has lost a legend. But his legacy in circuit design will continue strongly…
In the death of Prof. Willy Sansen (April 24, 2024), the analog world has lost a legend. But his legacy in circuit design will continue strongly…
Liked by Pedram Payandehnia
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Our CEO, Jensen Huang, will be joining a conversation with #AI leaders at Oregon State University's "Global Futures Forum: Artificial Intelligence"…
Our CEO, Jensen Huang, will be joining a conversation with #AI leaders at Oregon State University's "Global Futures Forum: Artificial Intelligence"…
Liked by Pedram Payandehnia
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Congrats, Mostafa Essawy! Much deserved. Looking forward to your future contributions.
Congrats, Mostafa Essawy! Much deserved. Looking forward to your future contributions.
Liked by Pedram Payandehnia
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Announcing Earth-2 climate digital twin cloud platform for simulating and visualizing weather and climate at unprecedented scale.
Announcing Earth-2 climate digital twin cloud platform for simulating and visualizing weather and climate at unprecedented scale.
Liked by Pedram Payandehnia
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Two of these three individuals are Oregon State University engineers. Can you guess? I was so excited to see Agility Robotics Digit hanging out…
Two of these three individuals are Oregon State University engineers. Can you guess? I was so excited to see Agility Robotics Digit hanging out…
Liked by Pedram Payandehnia
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It's an honor to be recognized as an NVIDIA Partner of the Year. Here's to many more years of collaborative endeavors. 🥂🍾 #solutionprovider…
It's an honor to be recognized as an NVIDIA Partner of the Year. Here's to many more years of collaborative endeavors. 🥂🍾 #solutionprovider…
Liked by Pedram Payandehnia
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I'm extremely honored to receive the SSCS Predoctoral Achievement Award 2023-2024 from the IEEE Solid-State Circuits Society. Thanks to my advisor…
I'm extremely honored to receive the SSCS Predoctoral Achievement Award 2023-2024 from the IEEE Solid-State Circuits Society. Thanks to my advisor…
Liked by Pedram Payandehnia
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Honored to meet Prof. Nader Engheta a recipient of the Franklin Award. It's particularly special for me to have attended the same university as him…
Honored to meet Prof. Nader Engheta a recipient of the Franklin Award. It's particularly special for me to have attended the same university as him…
Liked by Pedram Payandehnia
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I'm so proud of Ali Agha and the entire Field AI team for being featured in Bill Gates' latest post! This is a huge recognition for Field AI’s…
I'm so proud of Ali Agha and the entire Field AI team for being featured in Bill Gates' latest post! This is a huge recognition for Field AI’s…
Liked by Pedram Payandehnia
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