Crystal oscillator

Details Crystal oscillator Crystal oscillator

2009-10-27

2011-10-18

Kinkead, Arnold (Department: 2817)

Oscillators

With frequency adjusting means

With voltage sensitive capacitor

C331S1160FE, C331S1160FE, C331S158000, C331S176000

Reexamination Certificate

active

08040197

ABSTRACT:
A crystal oscillator includes a crystal unit and a voltage-variable capacitive element that is connected to the crystal unit in series, the crystal oscillator varying an oscillation frequency by applying a control voltage between terminals of the voltage-variable capacitive element and by varying a series equivalence capacitance at a side of the oscillator circuit when observed between terminals of the crystal unit. The crystal oscillator further includes a first resistor and a second resistor for dividing the control voltage. At least one of the first resistor and the second resistor is a temperature sensing resistor, the resistance of which changes depending on a temperature, so as to correct frequency temperature characteristics of the oscillation frequency.

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