A General Purpose 2MHz 68µW Temperature Compensated Reference Clock Oscillator

This paper presents a general-purpose 2MHz Reference Clock Oscillator that features temperature compensation in the range of -40 ◦ C to 70 ◦ C. In other words, through a feedback loop and the use of temperature-stable I <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">ref</inf> and V <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">ref</inf> sources, it manages to maintain a stable frequency despite temperature variations. It consists of a Current Starved Ring Voltage Controlled Oscillator, a Frequency to Voltage Converter and a Discrete Integrator. The proposed architecture is designed to be area efficient, operating at low power consumption (68µW), and at a low supply voltage (1V). The architecture is simulated using the Cadence IC Suite in a TSMC 90nm CMOS process.