Integrated oscillation circuit used for frequency conversion cir

Details Integrated oscillation circuit used for frequency conversion cir Integrated oscillation circuit used for frequency conversion cir

1995-11-15

1998-11-24

Pascal, Robert

Oscillators

Solid state active element oscillator

Transistors

4551802, 4551901, 331 49, 331 60, 331108C, 331108R, H03B 512

Patent

active

058413260

ABSTRACT:
An integrated oscillation circuit used for frequency conversion circuit in which UHF frequency conversion and VHF frequency conversion are selectively energized to use a common IF amplifier. The integrated oscillation circuit is used for a local oscillation circuit. The integrated oscillation circuit including a connection terminal connected to an external resonance circuit and an input line of a mode switching signal which is set at a different level in response to an operation mode, an oscillation element, a bias terminal of which is connected to the connection terminal, a detection circuit detecting the level of the mode switching signal applied to the bias terminal of the oscillation element, and a switching circuit turning on and off a power source for driving the oscillation element in response to the level detected at the detection circuit.

REFERENCES:
patent: 5198784 (1993-03-01), Fenk

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