Patent ID: 11899481
Assignee: CRESTRON ELECTRONICS, INC.
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. The power factor control circuit according to claim 9, wherein the at least two transistors provided in the feedback path comprises:
an NPN transistor comprising a first emitter, a first base, and a first collector, wherein
the first collector is connected to a first power supply voltage,
the first emitter is connected to a first end of a feedback resistor, and
the first base is connected to a second end of the feedback resistor and the inverting input of the op-amp; and

a PNP transistor comprising a second emitter, a second base and a second collector, wherein
the second emitter is connected to the first end of the feedback resistor,
the second collector is connected to ground, and
the second base is connected to the second end of the feedback resistor and the first base and the inverting input of the op-amp.