Voltage controlled oscillator for recovering data pulses from a

Details Voltage controlled oscillator for recovering data pulses from a Voltage controlled oscillator for recovering data pulses from a

1998-07-14

2000-03-21

Mis, David

Oscillators

Ring oscillators

331 34, 331177R, 327270, 327274, 327280, 327281, 330253, H03B 524, H03L 7099, H03F 345

Patent

active

060407433

ABSTRACT:
A voltage controlled oscillator (VCO), for use in a phase locked loop for clock multiplication, for example in recovery of data pulses from a data stream input comprising digital data with unknown phase. According to the invention, the VCO comprises a plurality of VCO stages, each stage being implemented as a differential amplifier. The amplifier load is formed of two cross-coupled gate devices and of two gate devices which are connected as diodes. The differential input is applied to a source coupled input pair as well as to two pull-down gate devices.

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patent: 5245637 (1993-09-01), Gersbach et al.
patent: 5422529 (1995-06-01), Lee
patent: 5504444 (1996-04-01), Neugebauer
patent: 5523723 (1996-06-01), Arcus et al.
patent: 5686867 (1997-11-01), Sutardja et al.

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