公开(公告)号：US20210067145A1

公开(公告)日：2021-03-04

申请号：US16835778

申请日：2020-03-31

Applicant: Samsung Electronics Co., Ltd.

Inventor： Xiong LIU ,  Chih-Wei YAO

IPC: H03K3/03 ,  H03K3/012

Abstract: A ring voltage controlled oscillator (VCO) circuit is herein provided. According to one embodiment, a ring VCO circuit includes a plurality of stages connected in series, wherein each stage includes a first inverter, a second inverter, a third inverter and a fourth inverter, the first inverter connected in parallel with the third and fourth inverters and the second inverter connected in parallel with the third and fourth inverters, and a first biasing resistor connected to a first node and coupled to an input of the first inverter. The first biasing resistor includes a first switch configured to set the first biasing resistor to about zero voltage

公开(公告)号：US20210067166A1

公开(公告)日：2021-03-04

申请号：US16839124

申请日：2020-04-03

Applicant: Samsung Electronics Co., Ltd.

Inventor： Xiong LIU ,  Chih-Wei YAO

IPC: H03L7/197 ,  H03L7/099 ,  H04B1/16 ,  H04L7/033

Abstract: A system, method and electronic device are provided. The system includes a shared fractional-N phase-lock loop (PLL), a ring oscillator circuit (OSC), and a multiphase injection pulse generator configured to receive an input signal having a first frequency from the shared fraction-N PLL and generate injection pulses for the OSC based on the input signal.