US 12,294,308 B2
Circuit and method for compensating output of voltage source, and voltage source
Chao Wen, Beijing (CN); and Tai Ma, Beijing (CN)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/927,163
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed May 22, 2020, PCT No. PCT/CN2020/091894
§ 371(c)(1), (2) Date Nov. 22, 2022,
PCT Pub. No. WO2021/232426, PCT Pub. Date Nov. 25, 2021.
Prior Publication US 2023/0318461 A1, Oct. 5, 2023
Int. Cl. H02M 1/15 (2006.01); G01R 19/165 (2006.01); H02M 1/14 (2006.01); H02M 3/335 (2006.01)
CPC H02M 3/33561 (2013.01) [G01R 19/16538 (2013.01); H02M 1/143 (2013.01); H02M 1/15 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A circuit for compensating an output of a voltage source, comprising:
a sensing unit;
a first adjustment unit;
an amplifier unit; and
a second adjustment unit, wherein
the sensing unit is coupled between the output of the voltage source and a first input terminal of an amplifier in the amplifier unit; and the sensing unit is configured to transfer the output of the voltage source to the amplifier,
the first adjustment unit is coupled in parallel with the sensing unit, and configured to generate one or more of: at least one pole point or at least one zero point in a transfer function of the circuit,
a second input terminal of the amplifier in the amplifier unit is coupled to a reference voltage, and
the second adjustment unit is coupled in parallel with a first resistor between an output of the amplifier and a controller of the voltage source, and the second adjustment unit is configured to generate at least one zero point in the transfer function of the circuit;
wherein the circuit further comprises:
a threshold unit, coupled with the first adjustment unit in series;
wherein the threshold unit is configured to be turned on when a ripple of the output of the voltage source is greater than a predefined threshold and to be turned off when the ripple of the output of the voltage source is less than the predefined threshold.