US 12,271,215 B2
System on chip including a supplemental power supply circuit
Ho-Yeon Jeon, Hwaseong-si (KR); and Mun Won Lee, Pyeongtaek-si (KR)
Assigned to Samsung Electronics Co., Ltd., (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Feb. 3, 2022, as Appl. No. 17/591,707.
Claims priority of application No. 10-2021-0064872 (KR), filed on May 20, 2021.
Prior Publication US 2022/0374033 A1, Nov. 24, 2022
Int. Cl. G05F 1/565 (2006.01); G05F 1/46 (2006.01); H02M 3/158 (2006.01)
CPC G05F 1/465 (2013.01) [G05F 1/565 (2013.01); H02M 3/1582 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A system-on-chip, comprising:
a system power supply circuit, which outputs a first supply voltage;
a functional circuit, which receives the first supply voltage and operates at a second supply voltage;
a supplemental power supply circuit, which is configured to generate a supplemental voltage and comprises at least one variable resistor and a current source;
a comparator, which compares the first supply voltage with the second supply voltage and outputs a comparison signal; and
a switching unit, which includes a plurality of transistors and is connected to the supplemental power supply circuit and gated according to the comparison signal,
wherein the supplemental voltage is provided to the functional circuit based on the comparison signal,
wherein the supplemental power supply circuit is configured to directly receive the comparison signal and provide the supplemental voltage, which is adjusted based on the comparison signal, to the functional circuit, and
wherein:
the at least one variable resistor is variable according to the comparison signal,
the comparator includes a controller configured to adjust a gain,
the controller adjusts an output range of the comparison signal according to the gain, and
the comparison signal is based on a difference between the second supply voltage and the first supply voltage.