Patent ID: 11876485
Assignee: TXC CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. An oscillating device, arranged in an environment having an ambient temperature, comprising:
a heater;
a thermoelectric cooler;
a frequency source whose frequency is temperature-dependent on the ambient temperature; and
a temperature controlled circuit electrically connected to the heater and the thermoelectric cooler, wherein, when the ambient temperature is in a first range between a first temperature and a second temperature higher than the first temperature, the temperature controlled circuit drives the heater to a target temperature to adjust an operating temperature of the frequency source, and when the ambient temperature is in a second range between a third temperature and a fourth temperature higher than the third temperature, the temperature controlled circuit drives the thermoelectric cooler to the target temperature to adjust the operating temperature of the frequency source;
wherein the third temperature is higher than the first temperature and the fourth temperature is higher than the second temperature:
wherein the temperature controlled circuit comprises:
a temperature sensor sensing the ambient temperature to generate a first detected voltage when the ambient temperature is in the first range, and the temperature sensor senses the ambient temperature to generate a second detected voltage when the ambient temperature is in the second range;
a target temperature setting circuit generating a first control voltage based on the ambient temperature and the target temperature when the ambient temperature is in the first range, and the target temperature setting circuit generates a second control voltage based on the ambient temperature and the target temperature when the ambient temperature is in the second range;
a first comparator electrically connected to the temperature sensor, the target temperature setting circuit, and the heater and configured to receive the first control voltage and the first detected voltage and drive the heater based on the first control voltage and the first detected voltage; and
a second comparator electrically connected to the temperature sensor, the target temperature setting circuit, and the thermoelectric cooler and configured to receive the second control voltage and the second detected voltage and drive the thermoelectric cooler based on the second control voltage and the second detected voltage.