Patent ID: 7362192
Filing Date: 2008-04-22
Classification: H03B

Abstract:
1. An oscillator circuit comprising: a first pair of cross-coupled transistors having a first metal oxide semiconductor (MOS) transistor and a second MOS transistor; a second pair of cross-coupled transistors having a third MOS transistor and a fourth MOS transistor, wherein a first pair of control terminals of the first MOS and third MOS transistors are coupled together, and a second pair of control terminals of the second MOS and fourth MOS transistors are coupled together; a first inductor in communication with the first pair of control terminals of the first MOS and third MOS transistors and a second pair of output terminals of the second MOS and fourth MOS transistors; a second inductor in communication with the second pair of control terminals of the second MOS and fourth MOS transistors and a first pair of output terminals of the first MOS and third MOS transistors; and a tank circuit at least one of coupled between the first pair of control terminals and the first pair of output terminals and coupled between the second pair of control terminals and the second pair of output terminals, wherein the tank circuit comprises a tank inductor and a variable capacitor.