A 220GHz Super-Regenerative Receiver in 65nm CMOS

A 220G super-regenerative receiver (SRR) in 65nm CMOS is designed in this paper. The LC-tank voltage controlled oscillator is adopted in this SRR to replace the super-regenerative oscillator in a traditional SRR, which is used to enlarge the bandwidth of the SRR. Because the cut-off frequency of the MOSFET used in this SRR is lower than the operating frequency, the RF signal is injected to the common-mode node of the varactor, which also increase the phase balance and reverse isolation of the VCO waveform. The post-layout simulated results show that the SRR achieves the sensitivity of -76 dBm and the bandwidth of 1.68 GHz. The gain is larger than 41.3 dB overall the whole 3dB-bandwidth. This SRR consumes a power of 28.63 mW while applying 1.4-V power supply, and it occupies the area of 0.17 mm
²
.