Oscillators – Ring oscillators
Patent
1998-01-12
2000-10-03
Kinkead, Arnold
Oscillators
Ring oscillators
331175, 326 31, 326 34, 327205, 327206, 327264, H03K 19094, H03K 3356
Patent
active
06127898&
ABSTRACT:
A ring oscillator using CMOS technology having three logic gates, including a threshold amplifier, where the transistors that set the voltage rise threshold and the voltage drop threshold in the amplifier are controlled by a bias control circuit so that the ratio of voltage rise threshold to the voltage supply diminishes and the ratio of the voltage drop threshold to the voltage supply increases, when the supply voltage falls.
REFERENCES:
patent: 5250914 (1993-10-01), Kondo
French Search Report from French Patent Application No. 94 00257, filed Jan. 13, 1997.
Ramirez-Angulo J.: "A Compact Current Controlled CMOS Waveform Generator" IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing, vol. 39, No. 12, Dec. 1, 1992, pp. 883-885.
Dokic: "CMOS Schmitt Triggers" IEE Proceedings G., Electronic Circuits & Systems, vol. 131, No. 5, Oct. 1984, Stevenage, GB, pp. 197-202.
Galanthay Theodore E.
Kinkead Arnold
Morris James H.
SGS-Thomson Microelectroncs S.A.
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