Patent ID: 9515607
Filing Date: 2016-12-06
CPC Classification: H03B,H03K,H03L

Claim Text:
1. A method of controlling a voltage controlled oscillator (VCO) having an LC tank and at least one pair of transistors cross-coupled across a pair of common nodes of the LC tank, with a drain of one transistor of the pair and a gate of the other transistor of the pair connected to one of the pair of common nodes of the LC tank, and a gate of the one transistor of the pair and a drain of the other transistor of the pair of transistors connected to the other of the pair of common nodes of the LC tank, the method comprising: providing a first supply voltage to the VCO such that a voltage difference between a common mode voltage at the pair of common nodes and a source voltage of transistors of the pair of transistors is less than a threshold voltage of the transistors of the pair of transistors; temporarily adjusting the common mode voltage to increase the voltage difference and initiate oscillation in the VCO at the common nodes by selectively activating one of: during steady-state oscillation, powering the VCO with the first supply voltage.