Crystal oscillator emulator
First Claim
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1. 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.
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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.
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Citations
33 Claims
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1. A crystal oscillator emulator integrated circuit, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 31)
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11. A crystal oscillator emulator integrated circuit, comprising:
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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. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 32)
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21. A method for operating a crystal oscillator emulator integrated circuit, comprising:
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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. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 33)
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Specification