Microelectromechanical multi-stage oscillator
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United States of America Patent
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Issued Date -
Nov 8, 2007
app pub date -
May 3, 2006
filing date -
May 3, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Embodiments of an oscillator circuit are described. Embodiments described herein include an oscillator circuit suitable for a resonator with relatively high motional impedance, thus requiring relatively high amplification and having relatively high sensitivity to noise. However, the embodiments described are not intended to be limited to use with any particular type of resonator. In one embodiment, alternating current (AC) coupling, or capacitive coupling, is used in part to decouple the bias voltage placed on the resonator from the operating point of the amplifier, allowing one voltage to be high relative to the other. In an embodiment, some legs, or all legs of the circuit that includes drive circuitry and a resonator include differential signaling.
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