Patent ID: 9595980
Date: 2017-03-14
CPC Classifications: H03B,H03F,H04B,H04L

Claim:
1. An oscillation circuit comprising: a voltage adjuster adjusting a magnitude of a power supply voltage according to a digital signal; an LC tank circuit connected between first and second nodes and generating a resonance signal on a basis of the magnitude-adjusted power supply voltage; and a differential amplification circuit oscillating the resonance signal or modifying an oscillation state of the resonance signal to output a first output voltage signal to the first node and output a second output voltage signal to the second node, wherein the differential amplification circuit comprises: a first transistor connected to the first node and a ground terminal; a second transistor connected to the second node and the ground terminal; a third transistor connected to the first node; a second switch connected between the third transistor and the ground terminal; a fourth transistor connected to the second node; and a third switch connected between the fourth transistor and the ground terminal.