Voltage supply isolation buffer

Details Voltage supply isolation buffer Voltage supply isolation buffer

1995-08-02

1997-04-15

Pascal, Robert

Oscillators

Ring oscillators

331116FE, 331175, 326 24, 326 83, 326 85, 326 34, 327264, 327278, 327281, 327391, H03B 500

Patent

active

056213603

ABSTRACT:
A CMOS delay cell with feedback circuitry to ensure that the delay cell is operating in saturation mode. A voltage controlled oscillator (VCO) comprising a loop of an odd number of delay cells, where the VCO is operating in a saturation mode. Under normal operation any intermediate node in the VCO will generate an output signal from a delay cell with reduced supply noise. The output signal can be used to generate a PLL clock signal with a lower phase jitter than prior art VCO's operating at low supply potentials.

REFERENCES:
patent: 4617529 (1986-10-01), Suzuki
patent: 5175445 (1992-12-01), Kinugasa et al.

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