CMOS voltage controlled oscillator

Details CMOS voltage controlled oscillator CMOS voltage controlled oscillator

1998-07-16

2000-01-04

Mis, David

Oscillators

Ring oscillators

331175, 331177R, 331185, H03B 524

Patent

active

060114436

ABSTRACT:
A CMOS voltage controlled oscillator (VCO) having an improved voltage-to-current converter and an active MOS load operating in the triode region to provide improved performance characteristics including a small differential logic swing and a high frequency output. The voltage-to-current converter of the CMOS VCO comprises a pair of MOS transistors, one of which has an aspect ratio (W.sub.P /L.sub.P) and the other of which has an aspect ratio (W.sub.P /L.sub.P)
, wherein 1<n<4. This configuration causes a third MOS transistor in the voltage-to-current converter to operate exclusively in the triode region. The CMOS VCO also includes an ICO portion having a plurality of delay stages connected in a ring configuration. Each of the delay stages comprises a pair of input MOS transistors and a pair of load MOS transistors. In accordance with the invention, the voltage-to-current converter causes each of the load MOS transistors to operate in the triode region.

REFERENCES:
patent: 4947140 (1990-08-01), Tateishi
patent: 5061907 (1991-10-01), Rasmussen
patent: 5216390 (1993-06-01), Erftemeijer et al.
patent: 5239274 (1993-08-01), Chi
patent: 5399995 (1995-03-01), Kardontchick et al.
patent: 5469120 (1995-11-01), Nguyen et al.
patent: 5635880 (1997-06-01), Brown
patent: 5644270 (1997-07-01), Moyer et al.
patent: 5673008 (1997-09-01), Sumita
patent: 5703543 (1997-12-01), Taylor
patent: 5815042 (1998-09-01), Chow et al.

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