Reduction of supply voltage and power consumption of an injection-locked oscillator for biomedical telemetry

A major design challenge for short-range wireless communication is a low-power transmitter with high efficiency. Unlike conventional transmitters used for cellular communication, injection-locked oscillator based transmitter shows greater promises with reduced power consumption and high transmitter efficiency. This paper presents a low-voltage low-power injection-locked oscillator (ILO) employing self-cascode structure and body-terminal coupling. The proposed oscillator has been fabricated using 0.18-¿m RF CMOS process. Measurement results indicate that the proposed oscillator can operate with a supply voltage as low as 1 V and consumes only 2 mW of power, which makes the design highly suitable for low-power transmitter applications.