Patent ID: 11868150
Assignee: REALTEK SEMICONDUCTOR CORPORATION
Field: Control (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A power supply stabilizing circuit having noise suppressing mechanism used to drive a voltage control oscillator circuit, comprising:
a current-adjusting N-type transistor comprising:
a drain configured to receive a first operation voltage;
a source configured to generate a power signal to the voltage control oscillator circuit such that the voltage control oscillator circuit operates according to the power signal; and
a gate configured to receive an adjusting voltage;

a variable resistor circuit configured to receive and divide the first operation voltage to output a reference voltage; and
an adjusting voltage generation circuit configured to operate according to a second operation voltage higher than the first operation voltage and receives the reference voltage that is a division of the first operation voltage to generate the adjusting voltage, wherein the adjusting voltage is a sum of the reference voltage and a threshold voltage of the current-adjusting N-type transistor such that the current-adjusting N-type transistor operates in a saturation region to keep a current variation amount of the power signal smaller than a current variation predetermined value.