公开(公告)号：US20240007051A1

公开(公告)日：2024-01-04

申请号：US18124859

申请日：2023-03-22

申请人： GigaDevice Semiconductor Inc.

发明人： Yunchao LIU ,  Sanlin LIU

IPC分类号： H03B5/36 ,  H03B5/06

CPC分类号： H03B5/364 ,  H03B5/06 ,  H03B2200/0038

摘要： An oscillator circuit is provided and includes first and second terminals; an amplification circuit with an input end and an out end coupled to a first end and a second end of a crystal circuit through the first terminal and the second terminal, respectively; a gain control circuit coupled to the amplification circuit and including a differential amplifier, a first current source, a feedback path and a current mirror, wherein: the differential amplifier includes first and second transistors, sources of the first and second transistors are coupled to the first current source; a gate of the first transistor is coupled to a first direct current voltage and coupled to the input end or the output end through the feedback path; a gate of the second transistor is coupled to a second direct current voltage; the current mirror mirrors a current flowing through the second transistor to the amplification circuit.