Voltage controlled oscillator including ring-shaped inverter cir

Details Voltage controlled oscillator including ring-shaped inverter cir Voltage controlled oscillator including ring-shaped inverter cir

1999-07-20

2000-10-24

Mis, David

Oscillators

Ring oscillators

331177R, H03B 524

Patent

active

061373710

ABSTRACT:
In a voltage controlled oscillator including an odd number of inverter circuits connected in a ring shape, at least one of the inverter circuits is constructed by an inverter and a current control circuit connected in series between a pre-stage inverter circuit and post-stage inverter circuit, and a voltage control circuit connected between the pre-stage inverter circuit and the post-stage inverter circuit. The inverter receives an output signal of the pre-stage inverter circuit to generate an inverted signal. The current control circuit supplies a current in accordance with the inverted signal to the post-stage inverter circuit. The current is controlled by an input voltage. The voltage control circuit charges and discharges an input capacitance of the post-stage inverter circuit in accordance with the output signal of the pre-stage inverter circuit.

REFERENCES:
patent: 5952892 (1999-09-01), Szajda

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