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United States Patent 6,097,065
Forbes, et. al. Aug. 1, 2000

Circuits and methods for dual-gated transistors

Abstract

A circuit and method for an improved inverter is provided. The present invention capitalizes on a switched source impedance to prevent subthreshold leakage current at standby in low voltage CMOS circuits. The switched source impedance is provided by dual-gated transistors. The dual gates of the transistors are biased to modify the threshold voltage of the transistors (V(t)). This design provides fast switching capability for low power battery operated CMOS circuits and systems. The devices can be used in a variety of applications, digital and analog, wherever a more compact structure with low power consumption and fast response time is needed.


Inventors: Forbes; Leonard (Corvallis, OR); Noble; Wendell P. (Milton, VT).
Assignee: Micron Technology, Inc. (Boise, ID).
Appl. No.: 50,281
Filed: Mar. 30, 1998
Intl. Cl. : H01L 29/786, H01L 27/105
Current U.S. Cl.: 257/350; 257/67; 257/74
Field of Search: 257/67, 74, 350

References Cited | [Referenced By]

U.S. Patent Documents
4,450,048May, 1984Gaulier 204/15
4,673,962Jun., 1987Chatterjee et al. 357/23.6
4,922,315May, 1990Vu 357/35
4,987,089Jan., 1991Roberts 437/34
4,996,574Feb., 1991Shirasaki 357/23.7
5,006,909Apr., 1991Kosa 357/23.6
5,023,688Jun., 1991Ando 257/350
5,097,381Mar., 1992Vo et al. 361/313
5,122,848Jun., 1992Lee et al. 357/23.6
5,250,450Oct., 1993Lee et al. 437/40
5,315,143May, 1994Tsuji 257/351
5,350,934Sept., 1994Matsuda 257/139
5,453,636Sept., 1995Eitan et al. 257/378
5,491,356Feb., 1996Dennison et al. 257/306
5,508,544Apr., 1996Shah 257/316
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5,646,900Jul., 1997Tsukude et al. 365/205
5,680,345Oct., 1997Hsu et al. 365/185.01
5,691,230Nov., 1997Forbes 437/62
5,796,143Aug., 1998Fulford, Jr. et al. 257/330
5,796,166Aug., 1998Agnello et al. 257/751
5,892,260Apr., 1999Okumura et al. 257/347

Foreign Patent Documents
431855B1Nov., 1990EP
Other References

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Primary Examiner: Jackson, Jr.; Jerome
Attorney, Agent or Firm: Schwegman, Lundberg, Woessner & Kluth, P.A.
22 Claims, 28 Drawing Figures

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