US 12,407,361 B2
Digital control regulator
Daisuke Ide, Kanagawa (JP); Nobuhiko Shigyo, Kanagawa (JP); Keita Komagata, Kanagawa (JP); Hiroyuki Watanabe, Kanagawa (JP); and Takahiro Naito, Kanagawa (JP)
Assigned to SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
Appl. No. 18/245,870
Filed by SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
PCT Filed Sep. 27, 2021, PCT No. PCT/JP2021/035375
§ 371(c)(1), (2) Date Mar. 17, 2023,
PCT Pub. No. WO2022/071222, PCT Pub. Date Apr. 7, 2022.
Claims priority of application No. 2020-165473 (JP), filed on Sep. 30, 2020.
Prior Publication US 2023/0361782 A1, Nov. 9, 2023
Int. Cl. H03M 1/00 (2006.01); H03M 1/12 (2006.01); H03M 1/18 (2006.01); H03M 1/34 (2006.01)
CPC H03M 1/181 (2013.01) [H03M 1/1205 (2013.01); H03M 1/34 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A digital control regulator, comprising:
an output stage circuit configured to generate an output voltage;
a first A/D converter configured to generate a first digital signal based on a first differential voltage between the output voltage and a first reference voltage;
a replica circuit configured to output a replica voltage corresponding to the output voltage, wherein
a circuit configuration of the replica circuit is same as a circuit configuration of the output stage circuit;
a second A/D converter configured to generate a second digital signal based on a second differential voltage between the replica voltage and a second reference voltage; and
a control circuit configured to:
generate a control signal based on the first digital signal and the second digital signal; and
control a gain of the output stage circuit based on the generated control signal, wherein
the output stage circuit and the control circuit are further configured to perform feedback control of the output voltage,
the replica circuit is further configured to output the replica voltage before start of the feedback control of the output voltage or in synchronization with a start timing of the feedback control, and
the second A/D converter is further configured to generate the second digital signal before the start of the feedback control of the output voltage or in synchronization with the start timing of the feedback control.