Patent ID: 11971734
Assignee: SG MICRO CORP
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 13:
14. The control circuit according to claim 13, wherein the current comparison module comprises tenth to fourteenth transistors, a second resistor, and a third resistor,
wherein the tenth transistor and the eleventh transistor form a current mirror, first current terminals of the tenth transistor and the eleventh transistor are connected to a second terminal of the third resistor, a first terminal of the third resistor is connected to the power supply voltage,
a first current terminal of the twelfth transistor is connected to a second current terminal of the tenth transistor, a control terminal is connected to a second terminal of the second resistor, a first terminal of the second resistor is connected to the power supply voltage,
an intermediate node of the second resistor and the twelfth transistor is connected to the sampling transistor to receive the current sampling signal,
a first current terminal of the thirteenth transistor is connected to a second current terminal of the eleventh transistor, a control terminal of the thirteenth transistor is connected to a first current terminal of the eleventh transistor, the first current terminal of the thirteenth transistor is used for providing the current detection signal,
second current terminals of the twelfth transistor and the thirteenth transistor are both connected to a first current terminal of the fourteenth transistor, a second current terminal of the fourteenth transistor is grounded,
the fourteenth transistor is configured to obtain the bias current through a mirror structure.