Oscillator having periodically pulsed crystal

Details Oscillator having periodically pulsed crystal Oscillator having periodically pulsed crystal

1990-01-19

1991-04-23

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331166, 331158, H03B 536

Patent

active

050103075

ABSTRACT:
An oscillator circuit for use with a supply line and a line at a reference potential includes a crystal and a switching stage, the switching stage being closeable to connect the crystal to the supply line via one terminal of the crystal. The other terminal of the crystal is connected to the line at reference potential. Closing of the switching stage is controlled by a drive unit, which has an input to which the output of the switching stage is fed back. The drive circuit causes the switching stage to be briefly closed during a half period of the oscillation. If the oscillator circuit is manufactured as an integrated circuit, only one terminal pin is required for connection to the crystal, thereby saving space.

REFERENCES:
patent: 4117421 (1978-09-01), Wiesner
patent: 4743789 (1988-05-01), Puskas
"A One-Pin Crystal Oscillator for VLSI Circuits", Santos, et al., IEEE Journal of Solid-State Circuits, vol. SC-19, Apr. 1984 (pp. 228-235).

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