Current controlled oscillator including conversion of control vo

Details Current controlled oscillator including conversion of control vo Current controlled oscillator including conversion of control vo

1991-02-12

1992-04-14

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular frequency control means

331111, 331177R, 331 17, H03B 524, H03L 7107

Patent

active

051051699

ABSTRACT:
A voltage-controled oscillator circuit generates an output signal with a frequency that varies in response to a control current regulated by an applied control voltage. The voltage-controlled oscillator also thresholds the control voltage according to two different threshold voltages, producing a thresholded signal with a hysteresis characteristic. The thresholded signal switches a constant-current circuit on and off. When switched on, the constant-current adds a fixed current to the control current, thus widening the frequency range of the output signal.

REFERENCES:
patent: 4806883 (1989-02-01), Tamura et al.
patent: 4855688 (1989-08-01), Douziech et al.
patent: 4975662 (1990-12-01), Takeuchi

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