Crystal oscillator including a pair of push-pull complementary t

Details Crystal oscillator including a pair of push-pull complementary t Crystal oscillator including a pair of push-pull complementary t

1976-12-13

1977-12-27

Grimm, Siegfried H.

Oscillators

Combined with particular output coupling network

Space discharge or unilaterally conductive device in output...

331108D, 331109, 331114, 331186, 331116R, H03B 536

Patent

active

040657280

ABSTRACT:
An improved integrated circuit oscillator adapted for crystal-controlled applications eliminates the need for capacitors and duty cycle control circuitry by using a cascaded pair of push-pull complementary transistor amplifier stages, a clipping-type automatic amplitude control circuit, and a resonant feed back path between the two amplifier stages. In an illustrative embodiment, floating bias voltages are established by a chain of diodes, with several bias currents set with respect to the chain current by emitter area relationships. Square-wave output is provided by a flip-flop connected to push-up and pull-down output circuits.

REFERENCES:
patent: 3585526 (1971-06-01), Zelinka
patent: 3649850 (1972-03-01), Davis
patent: 3855552 (1974-12-01), Thanhaeuser
patent: 3890580 (1975-06-01), Kuhn, Jr. et al.
patent: 3979693 (1976-09-01), Saari
Hansen et al., "Oscillator Circuit," IBM Technical Disclosure Bulletin, vol. 15, No. 8, Jan. 1973, pp. 2544, 2545.

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