US 11,942,900 B2
Signal compensation with summed error signals
Arthur B. Odell, Morgan Hill, CA (US)
Assigned to POWER INTEGRATIONS, INC., San Jose, CA (US)
Filed by POWER INTEGRATIONS, INC., San Jose, CA (US)
Filed on Oct. 14, 2021, as Appl. No. 17/501,877.
Prior Publication US 2023/0122632 A1, Apr. 20, 2023
Int. Cl. H03F 3/45 (2006.01); H03F 1/02 (2006.01); H03F 1/32 (2006.01)
CPC H03F 1/0288 (2013.01) [H03F 1/3229 (2013.01); H03F 1/3288 (2013.01); H03F 3/45636 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A compensated amplifier for use in a power converter controller, comprising:
a first amplifier coupled to receive a sensed signal and a reference signal and configured to generate a first error signal in response to the sensed signal and the reference signal;
a second amplifier coupled to the first amplifier and configured to generate a second error signal in response to the sensed signal and the reference signal;
an integrator coupled to the first amplifier and configured to generate an integrated error signal in response to the first error signal; and
an arithmetic operator coupled to the second amplifier, wherein the arithmetic operator is configured to generate a control signal in response to the integrated error signal and the second error signal,
wherein the first amplifier comprises a first transconductance amplifier, and
wherein the second amplifier comprises a differential amplifier, wherein the integrator comprises a capacitor coupled between an output of the first amplifier and an output of the second amplifier, and wherein the compensated amplifier further comprises a resistor coupled between the output of the first amplifier and a return.