Ring oscillator circuit having improved frequency stability with

Details Ring oscillator circuit having improved frequency stability with Ring oscillator circuit having improved frequency stability with

1991-01-03

1991-12-10

Grimm, Siegfried H.

Oscillators

Ring oscillators

331175, 331176, H03B 512, H03L 100

Patent

active

050721976

ABSTRACT:
A compensation circuit (14) for a ring oscillator (12) having an odd plurality of series-connected CMOS inverter stages includes first and second P-channel transistors and a resistor. The first transistor (32) has a source coupled to VDD and a gate coupled to ground. The resistor (34) is coupled between the drain of the first transistor and ground. The second transistor (36) has a source coupled to VDD, a gate coupled to the drain of the first transistor, and a drain coupled to a supply node of each of the inverter stages of the ring oscillator for providing a supply voltage that is compensated with respect to voltage, temperature, and semiconductor processing variables. In operation, the conductivity of the first transistor inversely controls the conductivity of the second transistor that supplies a compensated power to the inverter stages. The compensated power controls the conductivity of the transistors in the ring oscillator and the corresponding frequency of oscillation.

REFERENCES:
patent: 3978431 (1976-08-01), Lattin
patent: 4094137 (1978-06-01), Morokawa
patent: 4205518 (1980-06-01), Morokawa
patent: 4259715 (1981-03-01), Morokawa
patent: 4337529 (1982-06-01), Morokawa
patent: 4358728 (1982-11-01), Hashimoto
patent: 4443116 (1984-04-01), Yoshida et al.
patent: 4519086 (1985-05-01), Hull et al.
patent: 4547749 (1985-10-01), Kuo
patent: 4559616 (1985-12-01), Bruder
patent: 4710648 (1987-12-01), Hanamura et al.
patent: 4714901 (1987-12-01), Jain et al.
patent: 4789976 (1988-12-01), Fujishima

Affiliated with

Also associated with

Rating

Ring oscillator circuit having improved frequency stability with does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ring oscillator circuit having improved frequency stability with, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ring oscillator circuit having improved frequency stability with will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1043422