Title:
OSCILLATOR CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2024/051178
Kind Code:
A1
Abstract:
Provided is an oscillator circuit (100), comprising a frequency setting circuit (110), first and second clock signal generation circuits (120, 130), a clock synchronization circuit (150), a control circuit (140), and an output circuit (160). The frequency setting circuit (110) generates a frequency setting signal. The first and second clock signal generation circuits (120, 130) respectively generate first and second clock signals (clk1, clk2). When a first frequency selection signal (cr) is at an effective level, the control circuit (140) outputs the frequency setting signal via a second node (N2), outputs the first clock signal (clk1) via a sixth node (N6), and outputs the second clock signal (clk2) via a seventh node (N7), otherwise, the control circuit (140) outputs a second synchronization control signal (I2) via the second node (N2), outputs an external synchronization clock signal (sync) via the sixth node (N6), and outputs the first clock signal (clk1) via a seventh node (N7). The clock synchronization circuit (150) generates a first synchronization control signal (I1) and the second synchronization control signal (I2). The output circuit (160) outputs the first or second clock signal (clk1, clk2). The frequency of a signal input to the clock synchronization circuit (150) via the seventh node (N7) is equal to the frequency of a signal input to the clock synchronization circuit (150) via the sixth node (N6).
Inventors:
DENG YANGYANG (CN)
WANG YU (CN)
WANG YU (CN)
Application Number:
PCT/CN2023/090710
Publication Date:
March 14, 2024
Filing Date:
April 25, 2023
Export Citation:
Assignee:
SG MICRO CORP (CN)
International Classes:
H03L7/099
Foreign References:
| CN115549675A | 2022-12-30 | |||
| JP2017200115A | 2017-11-02 | |||
| CN113992004A | 2022-01-28 | |||
| CN114465620A | 2022-05-10 | |||
| US20060139073A1 | 2006-06-29 |
Attorney, Agent or Firm:
BEIJING HUIJIALUN INTELLECTUAL PROPERTY AGENCY CO., LTD et al. (CN)
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