公开(公告)号：US20210281266A1

公开(公告)日：2021-09-09

申请号：US17327358

申请日：2021-05-21

Applicant: SOCIONEXT INC.

Inventor： Yoji Bando ,  Heiji IKOMA

IPC: H03L7/099 ,  H03K3/03 ,  H03L7/089

Abstract: A voltage-controlled oscillator includes: a first transistor with its gate connected to an input terminal, its source connected to a first power supply, and its drain connected to a first node; a second transistor with its gate connected to a first bias voltage, its source connected to a second power supply, and its drain connected to the first node; and an inverter ring connected between the first node and the first power supply. The inverter ring is constituted by a plurality of stages of inverters connected in series, and an output of a final-stage inverter is connected to an output terminal and an input of an initial-stage inverter.

公开(公告)号：US20250070787A1

公开(公告)日：2025-02-27

申请号：US18945108

申请日：2024-11-12

Applicant: Socionext Inc.

Inventor： Taku TOSHIKAWA ,  Heiji IKOMA ,  Naoshi YANAGISAWA

IPC: H03L7/093 ,  H03L7/089 ,  H03L7/099 ,  H03L7/18

Abstract: A loop filter includes: an input terminal and an output terminal mutually connected via a first node; a filter unit; and a low pass filter provided between a second power supply terminal and a third power supply node. One or more of at least one first resistive element and at least one first capacitive element constituting the filter unit are provided between the first node and a first power supply terminal via a switch part, and at least either the resistance value or the capacitance value of the filter unit is variable with on/off of the switch part. The switch part is constituted by transistors, and the backgate of at least one of the transistors is connected to the third power supply node.