Quadrature oscillator having a variable frequency

Details Quadrature oscillator having a variable frequency Quadrature oscillator having a variable frequency

1996-04-23

1997-02-11

Mis, David

Oscillators

Ring oscillators

331 45, 331 74, 331 75, 331111, 331143, 331177R, 331DIG3, 327293, 327295, H03B 524, H03B 2700

Patent

active

056025149

ABSTRACT:
A quadrature oscillator is provided constructed of NOR gates in the manner of a non-linear circuit which is inherently unstable and which cycles sequentially through four distinct states at a rate determined by the constitution of the NOR gates. The quadrature oscillator includes first and second stages that each include first and second NOR gates. The output of the first NOR gate of the first stage is connected as an input to the second NOR gate of each of the first and second stages. The output of the second NOR gate of the first stage is connected as an input to the first NOR gate of each of the first and second stages. The output of the first NOR gate of the second stage is connected as an input to the first NOR gate of the first stage and the second NOR gate of the second stage. The output of the second NOR gate of the second stage is connected as and input to the second NOR gate of the first stage and the first NOR gate of the second stage. Each of the NOR gates includes first and second input transistors that each have a control node for receiving an input signal and a controllable path between an output node and a reference voltage, a diode-connected transistor connected between the output node and the reference voltage, and a current source connected to the output node.

REFERENCES:
patent: 3350659 (1967-10-01), Henn
patent: 3382455 (1968-05-01), Rapp
patent: 4368480 (1983-01-01), Senturia
patent: 5399994 (1995-03-01), Siniscalchi et al.
Glasser and Dobberpuhl, "The Design and Analysis of VLSI Circuits," Addison-Wesley Publishing Company, Reading, Massachusetts, 1985, pp. 34-37, 228-229. No Month.
Bennett et al., "Sub-Nanosecond Bipolar LSI," 1st I.E.E. European Solid State Circuits Conference, London, GB, pp. 34-35, 1975. No Month.
IBM Technical Disclosure Bulletin, 32:(12), pp. 149-151. May 1990.
Kumar, U. and S. P. Suri, "A simple digital 2.sup.n frequency multiplier," Int. J. Electronics 48:(1), pp. 43-45, 1980. No Month.
McGahee, T., "Pulse-frequency doubler requires no adjustment," Electronics 48:(8), p. 149, 1975, Apr.
Ware, et al, "THPM 14.1: A 200 MHz CMOS Phase-Locked Loop With Dual Phase Detectors," IEEE International Solid-State Circuits Conference, New York, USA, pp. 192-193 and 338, 1989, Feb.

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