Ring oscillator with two inverters per unit inverter circuit

Details Ring oscillator with two inverters per unit inverter circuit Ring oscillator with two inverters per unit inverter circuit

1997-03-20

1997-12-30

Pascal, Robert

Oscillators

Ring oscillators

331 45, 327261, 327269, H03B 524

Patent

active

057035415

ABSTRACT:
A ring oscillator shortens the delay time between consecutive delayed clock signals, and increases of the number of delayed clock signals, without changing the oscillation frequency f of the ring oscillator and the number of stages n of inverter in one loop, and holding the same control current/osclllation frequency. The ring oscillator has odd numbers of unit inverters, wherein the unit inverter comprises two serial circuits connected in parallel each comprising of P channel transistor and N channel transistor, constant current sources connected to P channel and N channel sides in these parallel circuits, respectively, which are controlled by a current control circuit.

REFERENCES:
patent: 4988960 (1991-01-01), Tomisawa
patent: 5448205 (1995-09-01), Rothermel
patent: 5469120 (1995-11-01), Nguyen et al.
patent: 5568103 (1996-10-01), Nakashima et al.

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