US 12,273,070 B2
Circuit device and oscillator
Hisashi Yamaguchi, Fujimi (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Oct. 30, 2023, as Appl. No. 18/497,080.
Claims priority of application No. 2022-174167 (JP), filed on Oct. 31, 2022.
Prior Publication US 2024/0146245 A1, May 2, 2024
Int. Cl. H03B 5/36 (2006.01); H03B 5/04 (2006.01)
CPC H03B 5/36 (2013.01) [H03B 5/04 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A circuit device comprising:
an oscillation circuit configured to generate a clock signal by oscillating a resonator;
a control circuit configured to perform a real-time clock process based on the clock signal;
a first power supply line;
a second power supply line;
a nonvolatile memory configured to operate at a first power supply voltage from the first power supply line;
a volatile memory configured to operate at a second power supply voltage from the second power supply line; and
a power supply switch circuit configured to perform control of switching between supply and non-supply of the first power supply voltage to the first power supply line and control of switching between supply and non-supply of the second power supply voltage to the second power supply line.