Crystal controlled stepping radio receiver having novel oscillat

Details Crystal controlled stepping radio receiver having novel oscillat Crystal controlled stepping radio receiver having novel oscillat

1975-11-17

1976-12-07

Pitts, Harold I.

325334, 325470, H04B 134

Patent

active

039965228

ABSTRACT:
A signal-seeking radio receiver is disclosed which has two different types of local oscillator circuits. One type of local oscillator includes two transistors, the emitter of the first connecting to the base of the second and having a capacitor connecting between the emitter of the second and the base of the first. A large number of diode switched crystals can be connected to the base of the first transistor of the local oscillator without introducing an instability in the oscillator circuit. The second type of local oscillator is of the same general design as the first type except that it additionally includes a third transistor connected to the second transistor in a fashion similar to the first transistor. In this second oscillator configuration, the circuitry used to step among the channels also is used to alternately make either the first or third transistor operative in the local oscillator circuit.

REFERENCES:
patent: 3750032 (1973-07-01), Andrews

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