Simultaneous multi-effect oscillator compensation using piecewise interdependent polynomials
First Claim
1. A packaged voltage-controlled temperature-compensated crystal oscillator (VCTCXO) comprising:
- a crystal oscillator configured to output a signal of a particular frequency;
a temperature sensor configured to measure a temperature of the crystal oscillator;
a microcontroller configured to generate an internal control voltage signal based at least in part on the temperature and an external control voltage received by the packaged VCTCXO; and
a combiner configured to combine an internal control voltage and the external control voltage to generate a control voltage, wherein the control voltage is supplied to the crystal oscillator to cause the crystal oscillator to generate the signal of the particular frequency.
1 Assignment
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Accused Products
Abstract
A packaged VCTCXO may include a crystal oscillator configured to output a signal of a particular frequency and a temperature sensor configured to measure an internal temperature of the crystal oscillator. In addition, the packaged VCTCXO may include a microcontroller configured to generate an internal control voltage signal based at least in part on the temperature and an external control voltage received by the packaged VCTCXO. Moreover, the packaged VCTCXO may include a combiner configured to combine an internal control voltage and the external control voltage to generate a control voltage. Further, the control voltage may be supplied to the crystal oscillator to cause the crystal oscillator to generate the signal of the particular frequency.
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Citations
22 Claims
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1. A packaged voltage-controlled temperature-compensated crystal oscillator (VCTCXO) comprising:
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a crystal oscillator configured to output a signal of a particular frequency; a temperature sensor configured to measure a temperature of the crystal oscillator; a microcontroller configured to generate an internal control voltage signal based at least in part on the temperature and an external control voltage received by the packaged VCTCXO; and a combiner configured to combine an internal control voltage and the external control voltage to generate a control voltage, wherein the control voltage is supplied to the crystal oscillator to cause the crystal oscillator to generate the signal of the particular frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for controlling a crystal oscillator, the method comprising:
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determining a characteristic of a crystal oscillator, wherein the characteristic of the crystal oscillator differs from a corresponding characteristic of another crystal oscillator; receiving a temperature signal corresponding to a temperature of the crystal oscillator; receiving an external voltage control signal; generating an internal voltage control signal based at least in part on the temperature signal and the characteristic of the crystal oscillator; determining a frequency adjustment signal based at least in part on a combination of the internal voltage control signal and the external voltage control signal; and providing the frequency adjustment signal to the crystal oscillator. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification