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A novel single-chip 860-960MHz band UHF RFID reader transceiver IC is fabricated in 0.18μm CMOS technology. The transceiver consists of a compact high-linearity low-noise-figure RF front-end, a programmable analog baseband for Rx path; and an image reject filter, a PGA, a switchable up-conversion modulator and a driver amplifier for Tx path. The 3-bit 3rd-order DSM fractional-N frequency synthesizer...
A low phase noise LC voltage controlled oscillator for UHF radio frequency identification reader is presented in this paper. Symmetrical LC resonators and a low-dropout-regulator are used to suppress the noise from tail current and power supply, respectively. 3-bit switched-capacitor array for coarse tuning followed by MOS varactors for fine tuning to ensure a Low voltage controlled oscillator gain...
A fully differential CMOS readout circuit for SOI resonant accelerometer is reported. The readout circuit is essentially an oscillator, consisting of an oscillator and a low noise automatic amplitude control (AAC) loop. A differential sense resonator is proposed to facilitate fully differential circuit topology and improves the SNR under a 3.3-V supply. A second-order AAC loop filter and a novel chopper...
This paper describes a fully-differential CMOS readout circuit for silicon micro-resonant accelerometer. Tested with a SOI resonator, the readout chip sustains the oscillation at 110 kHz with a phase noise of -36 dBc@1 Hz and a bias stability of 0.0035 Hz or 32 ppb, which can be translated to an amplitude noise of 1 Aring/radicHz down to 0.05 Hz and stability of 0.22 Aring up to 100 seconds. The chip...
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