Integrated circuit having self-contained voltage control oscilla

Oscillators – Plural oscillators – Adjustable frequency

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Details

331 56, 331108B, 331108C, 331177R, H03B 500

Patent

active

054500397

ABSTRACT:
An integrated circuit has a self-contained voltage control oscillation circuit wherein the oscillating frequency is controlled according to a control voltage; The circuit includes a first oscillation circuit which forms a first oscillation loop including a first amplifier for generating a first output signal with an oscillating frequency which is controlled according to an operating current of the first amplifier and a second oscillation circuit which forms a second oscillation loop including a second amplifer for generating a second output signal with an oscillating frequency which is controlled according to an operating current of the second amplifer; A circuit for generating a control voltage controls the operating currents of the first and second amplifers and a current regulating circuit for generating an operating current regulating signal regulates the operating currents of the first and second amplifers. The control volage generating circuit may include a first generator for generating a first control voltage which controls the operating current of the first amplifier and a second generator for generating a second control voltage which controls the operating current of the second amplifier.

REFERENCES:
patent: 4018126 (1977-04-01), Walmann

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