Crystal oscillator emulator
AssigneeMarvell World Trade Ltd.
InventorSehat Sutardja
Life of this patent
Estimating the term…
Abstract
An integrated circuit comprises a microelectromechanical (MEMS) resonator circuit that generates a reference frequency and that includes a semiconductor oscillator that generates resonator drive signal having a drive frequency and a MEMS resonator that receives the resonator drive signal. A temperature sensor senses a temperature of the integrated circuit. Memory stores calibration parameters and selects at least one of the calibration parameters as a function of the sensed temperature, wherein the drive frequency is based on the calibration parameters.
Claims33
An integrated circuit comprising:
- a microelectromechanical (MEMS) resonator circuit that generates a reference frequency and that includes:
- a semiconductor oscillator that generates resonator drive signal having a drive frequency;
- and
- a MEMS resonator that receives said resonator drive signal;
- a temperature sensor that senses a temperature of said integrated circuit;
- and
- memory that stores calibration parameters and that selects at least one of said calibration parameters as a function of said sensed temperature,
- wherein said drive frequency is based on said calibration parameters.
An integrated circuit comprising:
- microelectromechanical (MEMS) means for generating a reference frequency and that includes:
- semiconductor oscillating means for generating a resonator drive signal having a drive frequency;
- and
- a MEMS resonator means for receiving said resonator drive signal and for resonating;
- temperature sensing means for sensing a temperature of said integrated circuit;
- and
- storing means for storing calibration parameters and for selecting at least one of said calibration parameters as a function of said sensed temperature,
- wherein said drive frequency is based on said calibration parameters.
A method comprising:
- providing a microelectromechanical (MEMS) resonator circuit that generates a reference frequency and that includes:
- a semiconductor oscillator that generates resonator drive signal having a drive frequency;
- and
- a MEMS resonator that receives said resonator drive signal;
- sensing a temperature of said integrated circuit;
- and
- storing calibration parameters;
- selecting at least one of said calibration parameters as a function of said sensed temperature,
- wherein said drive frequency is based on said calibration parameters.
Dependencies are inferred from the claim text.