High speed, power supply independent CMOS voltage controlled rin

Details High speed, power supply independent CMOS voltage controlled rin High speed, power supply independent CMOS voltage controlled rin

1992-02-28

1992-12-29

Grimm, Siegfried H.

Oscillators

Ring oscillators

331 8, 331 34, 331 74, 331186, 307475, H03B 504, H03K 17693, H03K 190185

Patent

active

051755122

ABSTRACT:
A high speed voltage controlled oscillator (VCO) providing for low sensitivity to the noise on the integrated circuit's (IC) power supply. The VCO circuit creates a supply voltage for a ring oscillator independent of the IC's power supply thereby controlling the frequency of operation independent of variations on the IC's power supply. A high speed CMOS level shifting circuit provides for converting outputs of the VCO with low logic level and varying frequencies to a signal with a full CMOS logic level and low duty cycle distortion.

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