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

Claim 8:
9. A power factor control circuit comprising:
a modulator and power stage adapted to provide a main voltage; and
a feedback control circuit, comprising:
an operational amplifier (op-amp) integrated circuit, wherein a first output of the op-amp provides a feedback error control signal to control the main voltage;
at least two transistors provided in a feedback path between the first output of the op-amp and an inverting input to the op-amp; and
a plurality of discrete electrical components in the feedback path, such that
in response to either an increase or decrease of an inverting input voltage at the inverting input that exceeds a predetermined amount of voltage, the feedback control circuit provides the feedback error control signal to control the main voltage.