US 12,476,590 B2
Oscillator
Takashi Nomiya, Matsumoto (JP); and Kentaro Seo, Shiojiri (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Apr. 25, 2024, as Appl. No. 18/645,569.
Claims priority of application No. 2023-073119 (JP), filed on Apr. 27, 2023.
Prior Publication US 2024/0364261 A1, Oct. 31, 2024
Int. Cl. H03B 5/04 (2006.01); H03B 5/32 (2006.01); H03L 1/02 (2006.01); H03L 1/04 (2006.01)
CPC H03B 5/04 (2013.01) [H03B 5/32 (2013.01); H03L 1/028 (2013.01); H03L 1/04 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An oscillator comprising:
a resonator element;
a first temperature sensor that measures a temperature of the resonator element;
a temperature control element that controls the temperature of the resonator element; and
a temperature control circuit that generates a control signal for controlling an operation of the temperature control element, wherein
the temperature control circuit generates the control signal based on a value obtained by multiplying a difference between a set temperature and a first measured temperature measured by the first temperature sensor by a gain,
the gain is variable, and
the temperature control circuit switches, when the difference between the set temperature and the first measured temperature is equal to or less than a first temperature difference, the gain from a first value to a second value smaller than the first value in a start period after the temperature control element starts to operate.