| |
[摘要]：A regenerative frequency-modulated ultra-wideband (FM-UWB) receiver for low data rate (< 100 kbits/s) and short-distance (< 10 m) reception in the 4-5-GHz band, consisting of a 35-dB gain preamplifier, envelope detector/demodulator, IF amplifier, and 50-Omega test buffer is described. The tunable (3.8-5.1 GHz) receiver front-end operates on a 50-MHz sub-band that is selected, amplified, and transformed from FM to amplitude modulated by a regenerative preamplifier. Energy efficiency of the regenerative FM-UWB receiver compared to previously published FM-UWB implementations is improved by a factor of 8, to 22 nJ/bit. Measured receiver sensitivity is -84 dBm at 100-kbits/s data rate (10(-3) bit-error rate). Implemented in 65-nm bulk CMOS, the 0.3 mm(2) test chip consumes 2.2 mW (excluding test buffer) from a 1-V supply. |
|
