公开(公告)号：US20220385294A1

公开(公告)日：2022-12-01

申请号：US17675351

申请日：2022-02-18

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： KANGYEOP CHOO ,  WOOSEOK KIM ,  WONSIK YU ,  CHANYOUNG JEONG

IPC: H03L7/099 ,  H03L7/093 ,  H03B5/04

Abstract: A digitally controlled oscillator (DCO) includes; a current mirror configured to generate a supply current in response to a bias voltage matching a reference current, a variable resistor connected to the current mirror through a first node outputting the reference current and configured to provide a variable resistance in response to a first control signal, an oscillation circuit connected to the current mirror through a second node outputting the supply current and configured to generate an oscillation signal in response to the supply current, and a feedback circuit configured to control the bias voltage in relation to at least one of a voltage at the first node and a voltage at the second node.