On the design of micropower active resonators and oscillators using log-domain processing

A novel current-mode micropower active resonator and oscillator employing MOSFETs operating in weak inversion are proposed. The approach is an extension of the recently proposed current-mode bipolar log domain synthesis methodology. Simulation results using HSPICE demonstrate that a very high-Q active resonator tunable over several kHz and a very low distortion oscillator can be synthesised using simple processing building blocks, with net power consumption of less than a microwatt.