Differential mixer oscillator

Details Differential mixer oscillator Differential mixer oscillator

1992-01-15

1992-11-24

Mis, Davis

Oscillators

Beat frequency

331 38, 331 46, 331116R, 331158, 455333, H03B 536, H03B 2101

Patent

active

051666456

ABSTRACT:
A differential mixer oscillator employing two transistors in a differential pair as the sustaining amplifier for a quartz crystal resonator at some first high frequency. The bias current of the differential pair is modulated at a second high frequency derived from some second frequency generating source, typically a second quartz crystal resonator, and the product terms are available at the collectors of the two transistors for selective filtering. The differential mixer oscillator may be employed in multiples, and with a variety of current sources, such as a Colpitts oscillator circuit.

REFERENCES:
patent: 3378790 (1968-04-01), Bray
patent: 3986145 (1976-10-01), Hongu et al.
patent: 4052682 (1977-10-01), Wilcox
patent: 4661785 (1987-04-01), Benjaminson
patent: 4782309 (1988-11-01), Benjaminson
patent: 4959624 (1990-09-01), Higgins, Jr. et al.
Clark et al., Communications Circuits: Analysis and Design, Addison-Wesley (1971) pp. 252, 309.
Hewlett-Packard Company, Delcon Division, Operating and Service Manual Quartz Pressure Gauge System 2811B (excerpts), Mar. 1979.

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