A 0.7V intermittently operating LNA with optimal on-time controller for pulse-based inductive-coupling transceiver

This paper presents a low-power LNA for a inductive-coupling tranceiver. Intermittently operating technique to turn on LNA only at the moment when the pulse signal appears is used to reduce power consumption. To optimally control the On-time of LNA, pulse width detector based on self-oversampling TDC is used and compensate the PVT variations of On-time width and of pulse signal width. The fabricated test chip in 65nm CMOS occupies 0.06mm² and achieved the intermittently operating frequency at the range from 60 to 400Mbps. The power consumption is 0.42mW at 400Mbps and the supply voltage of 0.7V which corresponds to 37% power reduction from the power consumption without optimal On-Time Controller.