Temperature compensation circuit

Details Temperature compensation circuit Temperature compensation circuit

2007-01-09

2007-01-09

Shingleton, Michael B (Department: 2817)

Oscillators

Combined with particular output coupling network

Space discharge or unilaterally conductive device in output...

C331S074000, C331S176000, C331SDIG002, C331S175000

Reexamination Certificate

active

10733143

ABSTRACT:
A temperature compensation circuit has multiple configurable modules to produce a compensation signal whose temperature characteristic curve is the inverse of the frequency-to-temperature characteristic curve of a specified oscillator. A set of first modules that produce first sub-signals directly proportional to temperature and a set of second modules that produce second sub-signals inversely proportional to temperature have their outputs summed at a summation node. Each module may adjust the strength and shaped of its temperature characteristic sub-signal, and each module may optionally be assigned a temperature offset that impedes the output of its corresponding sub-signal until the assigned temperature offset is reached. Each of the first and second modules includes a signal generator and an optional temperature offset circuit, which may be incorporated into the operation of the signal generator. To produce a compensation signal to compensate a SAW resonator, a first module having a temperature offset and being directly proportional to temperature is summed with a second module having no temperature offset and being inversely proportional to temperature.

REFERENCES:
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patent: 6198356 (2001-03-01), Visocchi et al.
patent: 2002/0149434 (2002-10-01), Toncich et al.
patent: 2004/0124822 (2004-07-01), Marinca

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