US 12,323,116 B2
Broadband amplifier with DC gain error correction
Mark Mercer, Phoenix, AZ (US)
Assigned to Dialog Semiconductor (UK) Limited, London (GB)
Filed by Dialog Semiconductor (UK) Limited, London (GB)
Filed on Apr. 29, 2022, as Appl. No. 17/733,336.
Prior Publication US 2023/0353106 A1, Nov. 2, 2023
Int. Cl. H03F 3/45 (2006.01); G05F 1/575 (2006.01)
CPC H03F 3/45269 (2013.01) [G05F 1/575 (2013.01); H03F 2200/171 (2013.01); H03F 2200/462 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An error amplification circuit for a voltage regulator; wherein the error amplification circuit comprises
a differential error amplifier having a first input for a feedback signal of the voltage regulator and having a second input for a reference signal; wherein the differential error amplifier is configured to provide an amplifier output current in dependence of the signals at the first input and at the second input;
a current sensing unit configured to sense the amplifier output current to provide a sensed current;
a processing unit configured to process the sensed current to provide a processed current;
an adjustment resistor which is arranged in series with the second input of the differential error amplifier and to which the processed current is applied; and wherein the first input is the inverting input of the differential error amplifier, and the second input is the non-inverting input of the differential error amplifier.