Patent ID: 11909354
Assignee: SITIME CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 14:
15. An integrated circuit comprising:
a first temperature domain and a second temperature domain;
within the first temperature domain, a first die having at least one microelectromechanical systems (MEMS) resonant structure and a second die having at least one transistor;
within the second temperature domain, a third die having at least one transistor;
the second die having a heating element to heat the first temperature domain to a predetermined temperature that is different than a temperature of an ambient environment external to said integrated circuit;
a sensor to sense the temperature in the first temperature domain, and control circuitry, on the third die, to control the heating element in response to sensed temperature so as to urge the first temperature domain toward the predetermined temperature;
an insulator to maintain a temperature difference between the second temperature domain and the first temperature domain;
a thermally conductive element coupling the third die with the ambient environment, so as to urge the third die toward the temperature of the ambient environment;
wherein the integrated circuit is to output, via an external contact of said integrated circuit, a timing signal, the timing signal corresponding to a frequency of resonant motion of the at least one MEMS resonant structure, the timing signal generated using each of the at least one transistor of the second die and the at least one transistor of the third die.