Oscillators – Electromechanical resonator
Reexamination Certificate
2006-03-14
2006-03-14
Kinkead, Arnold (Department: 2817)
Oscillators
Electromechanical resonator
C331S1070DP, C331S176000, C331S066000, C331S074000
Reexamination Certificate
active
07012476
ABSTRACT:
A voltage-controlled oscillator includes a voltage-controlled phase-shift circuit, outputting a signal with the shift deviated from an input signal by a specified amount with an external control voltage Vt, a SAW resonator, a buffer, inputting a resonance signal having a specified resonance frequency from the SAW resonator, outputting a clock signal with a desired frequency, and outputting a positive-feedback-oscillation-loop output signal, wherein the voltage-controlled phase-shift circuit, the SAW resonator, and the buffer construct a positive-feedback oscillation loop, in which the frequency temperature characteristic of the SAW resonator is rotated by a specified amount using the temperature characteristic of the propagation delay time of the buffer to correct the frequency temperature characteristic of the SAW resonator.
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Harness & Dickey & Pierce P.L.C.
Kinkead Arnold
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