Crystal oscillator emulator
AssigneeMarvell World Trade Ltd.
InventorSehat Sutardja
Life of this patent
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Abstract
A crystal oscillator emulator integrated circuit comprises a first temperature sensor that senses a first temperature of the integrated circuit. Memory stores calibration parameters and selects at least one of the calibration parameters based on the first temperature. A semiconductor oscillator generates an output signal having a frequency, which is based on the calibration parameters, and an amplitude. An amplitude adjustment module compares the amplitude to a predetermined amplitude and generates a control signal that adjusts the amplitude based on the comparison.
Claims33
A crystal oscillator emulator integrated circuit, comprising:
- a first temperature sensor that senses a first temperature of said integrated circuit;
- memory that stores calibration parameters and that selects at least one of said calibration parameters based on said first temperature;
- a semiconductor oscillator that generates an output signal having a frequency, which is based on said calibration parameters, and an amplitude;
- and
- an amplitude adjustment module that compares said amplitude to a predetermined amplitude and that generates a control signal that adjusts said amplitude based on said comparison.
A crystal oscillator emulator integrated circuit, comprising:
- first temperature sensing means for sensing a first temperature of said integrated circuit;
- storing means for storing calibration parameters and for selecting at least one of said calibration parameters based on said first temperature;
- semiconductor oscillating means for generating an output signal having a frequency, which is based on said calibration parameters, and an amplitude;
- and
- amplitude adjustment means for comparing said amplitude to a predetermined amplitude and for generating a control signal that adjusts said amplitude based on said comparison.
A method for operating a crystal oscillator emulator integrated circuit, comprising:
- sensing a first temperature of said integrated circuit;
- storing calibration parameters;
- selecting at least one of said calibration parameters based on said first temperature;
- providing a semiconductor oscillator that generates an output signal having a frequency, which is based on said calibration parameters, and an amplitude;
- comparing said amplitude to a predetermined amplitude;
- and
- generating a control signal that adjusts said amplitude based on said comparison.
Dependencies are inferred from the claim text.