Zeshan Ahmad

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Patel M, et al. BMJ Case Rep 2017. doi:10.1136/bcr-2017-221607 Description A 47-year-old-man with a history of intravenous drug use and recent diagnosis of T-cell lymphoma returned to the emergency department 1 week after initiation of chemotherapy with complaint of left olecranon swelling. Admission vital signs included body temperature of 36.6°C, blood(More)
A 410-GHz imager consisting of a 4 sub-harmonic mixer formed with an anti-parallel diode-connected NMOS transistor pair, and an on-chip antenna with 4.4-dB simulated gain is demonstrated in 65-nm CMOS. At –1.6-dBm power delivered to the LO input bond pad, the imager achieves 16.8-dB voltage conversion loss and 34.1-dB DSB noise figure. When the noise(More)
An 840-GHz Schottky diode detector is integrated with an analog lock-in amplifier in 130-nm bulk CMOS. The integrated lock-in amplifier can support a modulation frequency of up to 10 MHz with a gain of 54 dB, a dynamic range of 42 dB, and an input referred noise of less than 10 nV/√(Hz) at modulation frequencies higher than 100 kHz. The integrated(More)
A broadband passive frequency tripler using an accumulation-mode symmetric MOS varactor (SVAR) in 65-nm bulk CMOS process is demonstrated. The measured output power (P<sub>out</sub>) is &gt;-15dBm over a 57GHz band. This tripler incorporating an on-chip patch antenna operates at frequencies between 390 and 456GHz, and achieves a peak Effective Isotropically(More)
We report a high data rate (upto 1 Gbps) Ultrawideband (UWB) transceiver for very low power applications. The transmitter side, including pulse generator (PG), power amplifier (PA) and on-chip antenna, consumes only 7 pJ/b (3 pJ/b w/o PA). The novel UWB on-chip antenna has relatively low loss of 10 dBi and allows for a more compact overall system suitable(More)
A fully integrated CMOS receiver for mm-wave rotational spectroscopy is demonstrated. The receiver consists of a sub-harmonic mixer based receiving front-end which down-converts 225-280 GHz RF input to 20 GHz intermediate frequency, a 20-GHz AM demodulator followed by a baseband buffer amplifier, and an 122-139 GHz local oscillator chain which is comprised(More)
Obesity and obstructive sleep apnea tend to coexist. Little is known about the effects of obstructive sleep apnea, obesity, or their treatment on central aortic pressures and large artery stiffness. We randomized 139 adults with obesity (body mass index >30 kg/m2) and moderate-to-severe obstructive sleep apnea to (1) continuous positive airway pressure(More)
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