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A fourth-order quadrature bandpass continuous-time sigma–delta modulator for a dual-channel global navigation satellite system (GNSS) receiver is presented. With a bandwidth (BW) of 33 MHz, the modulator is able to digitalize the downconverted GNSS signals in two adjacent signal bands simultaneously, realizing dual-channel GNSS reception with one receiver channel instead of two independent receiver...
A 0.5–30GHz wideband differential CMOS T/R switch is proposed with low insertion loss (IL), high power handling capacity and high TX-RX isolation. The independent bias technique is proposed to keep the transistors in ideal on/off mode to improve IL and power handling capacity. The leakage cancellation technique is introduced to cancel leakage from TX port to RX port with two match paths. The proposed...
This paper outlines the popular circuit tuning strategies reported for the implementation of reconfigurable low-noise amplifiers (LNAs). It presents a continuously-tuned LNA intended for multi-standard applications as well as enhancing the yield of conventional narrowband LNAs. The presented LNA is designed and implemented in a 0.25μm silicon-on-sapphire (SOS) CMOS process. It uses MOS-varactors at...
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