Low-power voltage-controlled oscillator

摘要

A circuit including a tank circuit, a pair of transistors, a bias circuit, and a capacitor. The transistors include (i) drain terminals coupled to the tank circuit, (ii) source terminals coupled to each other, and (iii) gate terminals cross-coupled to the drain terminals via a pair of capacitors. The bias circuit is coupled to the gates of the pair of transistors to i) alternatingly turn on the pair of transistors during a plurality of peaks of an oscillating signal of the tank circuit, and ii) turn off the pair of transistors during a plurality of crossing points of the oscillating signal. The capacitor is coupled to (i) the tank circuit and (ii) the pair of transistors.

主权项

1. A circuit comprising:
a tank circuit configured to generate an oscillating signal; a pair of transistors, wherein each transistor of the pair of transistor includes
(i) a drain terminal coupled to the tank circuit,(ii) a source terminal coupled the source terminal of the other transistor of the pair of transistor, and(iii) a gate terminal cross-coupled to the drain terminal of the other transistor via a respective capacitor; a bias circuit coupled to the gates of the pair of transistors, wherein the bias circuit is configured to
(i) alternatingly turn on the pair of transistors during a plurality of peaks of the oscillating signal, and(ii) turn off the pair of transistors during a plurality of crossing points of the oscillating signal; and a capacitor having a first terminal connected to the tank circuit and a second terminal connected to the source terminals of the pair of transistors.