Temperature-compensated crystal oscillator

Details Temperature-compensated crystal oscillator Temperature-compensated crystal oscillator

1998-07-08

2000-03-21

Kinkead, Arnold

Oscillators

Frequency stabilization

Temperature or current responsive means in circuit

331158, 331 66, 331177V, H03L 102

Patent

active

060407441

ABSTRACT:
In a temperature-compensated crystal oscillator, a series connection of an AT-cut crystal resonator, a MOS capacitor, and a first fixed capacitor is coupled in parallel with an amplifier and a second fixed capacitor, making up a crystal oscillation circuit. A first control signal generating circuit for temperature compensation is connected directly or via a first input resistor to one terminal of the MOS capacitor of the crystal oscillation circuit, and a second control signal generating circuit for temperature compensation is connected dirty or via a second input resistor to the other terminal of the MOS capacitor. The first control signal generating circuit serves as a rectilinear correction signal generating circuit on the lower temperature side while the second control signal generating circuit serves as a rectilinear correction signal generating circuit on the higher temperature side.

REFERENCES:
patent: 4412188 (1983-10-01), Helle et al.
patent: 4851792 (1989-07-01), Ochiai et al.

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