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

Claim 10:
11. The voltage control oscillator apparatus of claim 10, wherein the adjusting voltage generation circuit further comprises:
a first resistor and a second resistor;
a first N-type transistor comprising:
a drain configured to receive the first operation voltage;
a source electrically coupled to a ground terminal through the first resistor; and
a gate configured to receive the reference voltage;

a second N-type transistor matching the first N-type transistor and comprising:
a drain;
a source electrically coupled to the ground terminal through the first resistor; and
a gate electrically coupled to the drain of the second N-type transistor; and

a third N-type transistor matching the current-adjusting N-type transistor and comprising:
a drain configured to receive the second operation voltage through the second resistor;
a source electrically coupled to the drain of the second N-type transistor; and
a gate electrically coupled to the drain of the third N-type transistor, and electrically coupled to the gate of the current-adjusting N-type transistor to output the adjusting voltage;

wherein resistances of the first resistor and the second resistor make each of the first N-type transistor, the second N-type transistor and the third N-type transistor operates in a weak-inversion region.