Electronic digital logic circuitry – Signal sensitivity or transmission integrity – Bus or line termination
Patent
1995-04-17
1997-06-03
Westin, Edward P.
Electronic digital logic circuitry
Signal sensitivity or transmission integrity
Bus or line termination
326 90, H03K 190175
Patent
active
056358520
ABSTRACT:
A controllable active terminator for a computer bus providing low power, small size, switchable termination of a computer bus having a plurality of conductors. The active terminator includes a voltage reference circuit, an enable circuit, a buffer amplifier, and a plurality of output cells. The voltage reference circuit includes a power down circuit which turns the voltage reference circuit off, using the same control signal which also disconnects the termination resistors and output transistors of the output cells. The terminator uses FET technology to produce a low-power, small size, controllable terminator having stable and reliable operating characteristics. The amplifiers used in the active terminator comprise CMOS devices and thus are relatively small and consume relatively low power. When enabled, the voltage reference circuit is used to establish a reference voltage for the linear operation of the output transistors in the output cell. The output current is supplied by terminator power. Consequently, a more reliable and stable bus termination is provided by the present active terminator which uses relatively small and low power components. The output supply current capacity of the present terminator is greater than that provided by the prior art bus terminators.
REFERENCES:
patent: 4748426 (1988-05-01), Stewart
patent: 4792745 (1988-12-01), Dobkin
patent: 4831283 (1989-05-01), Newton
patent: 4920339 (1990-04-01), Friend et al.
patent: 5029284 (1991-07-01), Feldbaumer et al.
patent: 5099137 (1992-03-01), Lattin, Jr.
patent: 5120909 (1992-06-01), Kutz et al.
patent: 5184033 (1993-02-01), Chiao
patent: 5213846 (1993-05-01), Lee
patent: 5239559 (1993-08-01), Brach et al.
patent: 5239658 (1993-08-01), Yamamuro et al.
patent: 5254883 (1993-10-01), Horowitz et al.
patent: 5272396 (1993-12-01), Mammano et al.
patent: 5297067 (1994-03-01), Blackborow et al.
patent: 5309569 (1994-05-01), Warchol
patent: 5313105 (1994-05-01), Samela et al.
patent: 5313595 (1994-05-01), Lewis et al.
patent: 5319755 (1994-06-01), Farmwald et al.
patent: 5336948 (1994-08-01), Jordan
patent: 5338979 (1994-08-01), Mammano et al.
patent: 5362991 (1994-11-01), Samela
patent: 5381034 (1995-01-01), Thrower et al.
patent: 5398326 (1995-03-01), Lee
patent: 5455523 (1995-10-01), Wallace et al.
Linfinity Microelectronics, Production Data Sheet LX6431/LX6431A/LX6431B, Precision Programmable References Rev. 1.0, Oct. 1994.
Linfinity Microelectronics, Production Data Sheet TL431/TL431A/TL1431, Precision Programmable References Rev. 1.0, Jan. 1995.
Linfinity Microelectronics Inc.
Santamauro Jon
Westin Edward P.
LandOfFree
Controllable actice terminator for a computer bus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Controllable actice terminator for a computer bus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Controllable actice terminator for a computer bus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-394020