Control voltage generator for a clock, frequency reference,...

Details Control voltage generator for a clock, frequency reference,... Control voltage generator for a clock, frequency reference,...

2011-07-12

2011-07-12

Chang, Joseph (Department: 2817)

Oscillators

L-c type oscillators

C331S00100A, C331S034000, C331S1170FE, C331S17700V, C331S182000, C331S183000

Reexamination Certificate

active

07978017

ABSTRACT:
Exemplary embodiments of the invention provide a reference signal generator, system and method. An exemplary apparatus to generate a harmonic reference signal includes a reference resonator, such as an LC-tank, a control voltage generator adapted to provide a temperature-dependent control voltage; and a plurality of variable reactance modules. The reference resonator generates a first reference signal having a resonant frequency, and each reactance module is adapted to modify a corresponding reactance in response to the control voltage to maintain the resonant frequency substantially constant or within a predetermined variance over a predetermined temperature range. A frequency controller may also be included to maintain substantially constant a magnitude of a peak amplitude of the first reference signal and maintains substantially constant a common mode voltage level of the reference resonator.

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