Oscillators – Ring oscillators
Patent
1996-12-19
1999-06-01
Kinkead, Arnold
Oscillators
Ring oscillators
331DIG3, 327176, H03K 300, H03K 303
Patent
active
059091517
ABSTRACT:
A ring oscillator includes a set of metal-oxide-semiconductor (MOS) complementary, inverting stages, wherein each stage includes a pair of cross-coupled CMOS NAND or NOR gates. The first and last stages are also cross-coupled, such that positive and negative output signals of the last stage are connected respectively to negative and positive input signals of the first stage.
REFERENCES:
patent: 3350659 (1967-10-01), Henn
patent: 3535544 (1970-10-01), De Troye
patent: 4939384 (1990-07-01), Shikata et al.
patent: 5239274 (1993-08-01), Chi
"Multihase Clocking Achieves 100-Nsec MOS Memory" by L. Boysel et al, EDN Jun. 10, 1968, pp. 50-55.
"Wide-Range Multivibrator Using Integrated Circuits" by F. May, Electronic Applications vol. 29, No. 4, Publ. 1969, pp. 125-128.
Buchwald, A.W. and Martin, K.W., "High Speed Voltage-Controlled Oscillator with Quadrature Outputs," Electronics Letters, Feb. 14, 1991, vol. 27, No. 4, pp. 309-310.
Kinkead Arnold
Mitel Semiconductor Americas Inc.
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