Miscellaneous active electrical nonlinear devices – circuits – and – Gating – Utilizing three or more electrode solid-state device
Reexamination Certificate
1997-10-24
2001-04-10
Cunningham, Terry D. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Gating
Utilizing three or more electrode solid-state device
C327S427000, C327S374000
Reexamination Certificate
active
06215350
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates in general to signal switches and in particular, to a fast transmission gate switch, particularly useful for switching digital logic signals.
With the advent of very large-scale integrated circuits, the size of devices manufactured has been shrinking and the speed of the devices has continually increased. Most of the efforts, however, have been directed to designs where many circuits and the connections between them are made in the same medium such as a silicon chip. Since all the circuit components being fabricated are done in the same medium, devices may be made smaller by improved techniques such as improved lithography. By reducing the sizes of the devices and the lengths of the connections between them, the speed of the device is increased due to a decrease in the inductances, resistances and capacitances of individual devices and of the connections between them.
Board level designs have not kept pace with the above-described development in very large-scale integrated circuits. Printed circuit board designs frequently have large capacitances which slow down signal propagation. Thus if two high speed logic chips are connected through a slower device, the overall speed of the system is determined by the slowest component, namely, the slow connecting device. Passive switching devices such as transmission gates have been used in printed circuit board level designs for switching signals between digital logic devices. The slow speed of this type of switches determines the speed of signal transmission even though the two logic devices may operate at much higher speeds. It is therefore desirable to provide a stand-alone switching device which is much faster than the conventional passive transmission gate.
In one type of improved switching circuits that is frequently used, instead of a passive switch, an active device such as a logic buffer is used. While a buffer used as a switch causes a delay that is less than that caused by the conventional passive transmission gate switch, the delay caused by such buffers may nevertheless be excessive and undesirable for some high speed applications. It is thus desirable to provide a high speed switch that causes less delay than the above described switches.
SUMMARY OF THE INVENTION
The switching device of this invention has two input/output ports for passing or blocking signals between the two ports of the device. The device comprises a transistor having a first and a second terminal and a control terminal. The first and second terminals are connected between the two ports. The transistor thereby passes signals between the two ports when the transistor is turned on and blocks the passage of signals between the two ports when the transistor is turned off. The resistance between the first and second terminals is less than about 10 ohms when the transistor is turned on. The device further comprises means for applying a switching signal to the control terminal of the transistor for turning it on or off. In the preferred embodiment, the capacitance between the first or second terminal and a reference potential is less than about 50 pF when the transistor is turned on.
REFERENCES:
patent: 3184609 (1965-05-01), Yee
patent: 3325654 (1967-06-01), Mrazek
patent: 3614472 (1971-10-01), Kloppenborg
patent: 3617771 (1971-11-01), Lee
patent: 3953879 (1976-04-01), O'Connor-d'Arlach et al.
patent: 4004130 (1977-01-01), Streit et al.
patent: 4081792 (1978-03-01), Schussler et al.
patent: 4096399 (1978-06-01), Davis et al.
patent: 4210875 (1980-07-01), Beasom
patent: 4239980 (1980-12-01), Takanashi et al.
patent: 4245230 (1981-01-01), Kwok et al.
patent: 4412242 (1983-10-01), Herman et al.
patent: 4445051 (1984-04-01), Elmasry
patent: 4477742 (1984-10-01), Janutka
patent: 4502027 (1985-02-01), Ayasli
patent: 4511815 (1985-04-01), Wood
patent: 4571512 (1986-02-01), Schutten et al.
patent: 4571513 (1986-02-01), Lade et al.
patent: 4571606 (1986-02-01), Benjamin et al.
patent: 4574207 (1986-03-01), Benjamin et al.
patent: 4574208 (1986-03-01), Lade et al.
patent: 4574209 (1986-03-01), Lade et al.
patent: 4577208 (1986-03-01), Schutten et al.
patent: 4595847 (1986-06-01), Weir
patent: 4612465 (1986-09-01), Schutten et al.
patent: 4622568 (1986-11-01), Schutten et al.
patent: 4628307 (1986-12-01), Crouse
patent: 4633101 (1986-12-01), Masuda et al.
patent: 4638187 (1987-01-01), Boler et al.
patent: 4639754 (1987-01-01), Wheatley, Jr. et al.
patent: 4679134 (1987-07-01), Bingham et al.
patent: 4692781 (1987-09-01), Rountree et al.
patent: 4700460 (1987-10-01), Dolny et al.
patent: 4704550 (1987-11-01), Hechtman
patent: 4705759 (1987-11-01), Lidow et al.
patent: 4716398 (1987-12-01), Eccleston et al.
patent: 4716514 (1987-12-01), Patel
patent: 4719374 (1988-01-01), Bialo
patent: 4739193 (1988-04-01), Doty, II
patent: 4740717 (1988-04-01), Fletcher et al.
patent: 4758990 (1988-07-01), Uchida
patent: 4760439 (1988-07-01), Borkowicz et al.
patent: 4777577 (1988-10-01), Bingham et al.
patent: 4779029 (1988-10-01), Henderson et al.
patent: 4785201 (1988-11-01), Martinez
patent: 4797899 (1989-01-01), Fuller et al.
patent: 4803612 (1989-02-01), Skovmand
patent: 4809152 (1989-02-01), Bingham et al.
patent: 4810911 (1989-03-01), Noguchi
patent: 4814644 (1989-03-01), Yamakawa
patent: 4820942 (1989-04-01), Chan
patent: 4823029 (1989-04-01), Gabara
patent: 4857983 (1989-08-01), Baliga et al.
patent: 4882295 (1989-11-01), Czubatyj et al.
patent: 4894804 (1990-01-01), Uchida
patent: 4897774 (1990-01-01), Bingham et al.
patent: 4908799 (1990-03-01), Gaudronneau
patent: 4920344 (1990-04-01), Henderson et al.
patent: 4933574 (1990-06-01), Lien et al.
patent: 4961010 (1990-10-01), Davis
patent: 4961100 (1990-10-01), Baliga et al.
patent: 4963773 (1990-10-01), Ayasli
patent: 4978925 (1990-12-01), Dingwall et al.
patent: 4983865 (1991-01-01), Ho et al.
patent: 4989057 (1991-01-01), Lu
patent: 4999761 (1991-03-01), Bingham et al.
patent: 5008568 (1991-04-01), Leung et al.
patent: 5010261 (1991-04-01), Steigerwald
patent: 5012123 (1991-04-01), Ayasli et al.
patent: 5014055 (1991-05-01), Dingwall et al.
patent: 5038051 (1991-08-01), Firman et al.
patent: 5059823 (1991-10-01), Ahsanullah
patent: 5060037 (1991-10-01), Rountree
patent: 5061903 (1991-10-01), Vasile
patent: 5062110 (1991-10-01), Kobayashi et al.
patent: 5107152 (1992-04-01), Jain et al.
patent: 5150044 (1992-09-01), Hashizume et al.
patent: 5182479 (1993-01-01), Behagel et al.
patent: 5254974 (1993-10-01), Rebers et al.
patent: 5332932 (1994-07-01), Runaldue
patent: 59-115616 (1984-07-01), None
patent: 62-15922 (1987-01-01), None
patent: 62-30378 (1987-02-01), None
patent: 64-42863 (1989-02-01), None
patent: 64-57672 (1989-03-01), None
patent: 2-28939 (1990-01-01), None
patent: 2-90628 (1990-03-01), None
patent: 2-158171 (1990-06-01), None
patent: 2-196434 (1990-08-01), None
patent: 3-38839 (1991-02-01), None
patent: 3-46272 (1991-02-01), None
patent: 3-48428 (1991-03-01), None
patent: 1550617 (1990-03-01), None
Muller, et al., “Device Electronics For Integrated Circuits,” Library of Congress Cataloging in Publication Data, p. 349-350, (1977).
Quality Semiconductor 1991 Databook.
Modern Microelectronic Circuit Design, IC Applications, Fabrication Technology, vol. II, 705-707.
A. Carlson and D. Gisser,Electrical Engineering Concepts and Applications,Rensselaer Polytechnic Institute, Addison-Wesley Publishing Company, pp. 362-365.
R. Gregorian and G. Temes,Analog MOS Integrated Circuits for Signal Processing,A Wiley-Interscience Publication, John Wiley & Sons, New York, 1986, pp. 99-117, 462-483.
P. Allen and E. Sanchez-Sinencio,Switched Capacitor Circuits,Van Nostrand Reinhold Electrical/Computer Science and Engineering Series, New York, 1984, pp. 596-610.
V. Capel,Audio and Hi-Fi Engineer's Pocket Book,Heinemann Professional Publishing Ltd., London, 1988, pp. 7, 10.
English language title and abstract from Dialog associated with Japanese Publication No. 2-28939.
English language title and abstract from Dialog associated with Japanese Publication No. 2-90628.
En
Bever Hoffman & Harms LLP
Cunningham Terry D.
Integrated Device Technology Inc.
LandOfFree
Fast transmission gate switch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fast transmission gate switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fast transmission gate switch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2508324