US 12,308,800 B2
Circuit chip with power supply noise rejection
Li-Chen Liu, Hsinchu (TW)
Assigned to REALTEK SEMICONDUCTOR CORP., Hsinchu (TW)
Filed by REALTEK SEMICONDUCTOR CORP., Hsinchu (TW)
Filed on Mar. 10, 2022, as Appl. No. 17/691,240.
Claims priority of application No. 110144087 (TW), filed on Nov. 25, 2021.
Prior Publication US 2023/0163727 A1, May 25, 2023
Int. Cl. H03F 1/26 (2006.01); H03F 3/45 (2006.01)
CPC H03F 1/26 (2013.01) [H03F 3/45071 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A circuit chip with power supply noise rejection, comprising:
a switch unit, having a first connection terminal and a second connection terminal, wherein the first connection terminal is adapted to receive a power supply voltage, and the switch unit is configured to selectively turn on a first connection path between the first connection terminal and the second connection terminal according to a clock signal;
an energy storage unit, coupled to the second connection terminal of the switch unit, wherein when the switch unit turns on the first connection path, the energy storage unit is configured to generate a storage voltage on the second connection terminal according to the power supply voltage;
an operating circuit, coupled to the second connection terminal and configured to operate according to the storage voltage; and
an operation detection unit, coupled to the operating circuit and the switch unit, wherein the operation detection unit is configured to detect whether the operating circuit operates normally, and when the operation detection unit determined that the operating circuit operates abnormally, the operation detection unit cause the switch unit to turn on the first connection path.