Bus driver having noise removing circuit

Details Bus driver having noise removing circuit Bus driver having noise removing circuit

1998-05-26

2001-04-03

Tokar, Michael (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Output switching noise reduction

C326S086000, C326S090000, C326S027000

Reexamination Certificate

active

06211694

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a bus driver for a data processing system.
2. Description of the Related Art
In a data processing system, a plurality of packages each including a semiconductor integrated circuit are inserted into a back panel. The packages share buses formed on the back panel. In this case, each of the packages has a bus driver and a bus receiver.
A prior art bus driver includes an open drain type metal oxide semiconductor (MOS, or more broadly, metal insulating semiconductor (MIS)). This will be explained later in detail.
However, since the prior art bus driver per se does not include a noise removing circuit, a large ringing effect is generated in the bus. Therefore, it takes a long time to converge the ringing effect, which substantially increases the propagation delay time of signals from the bus driver to its respective bus receivers.
SUMMARY OF THE INVENTION
It is an object of the present invention to reduce the ringing effect in a bus driver, thus substantially reducing the signal propagation delay time.
According to the present invention, in a bus driver for driving a bus having an input terminal for receiving an input signal and an output terminal connected to the bus, a switching element is provided between the output terminal and the second power supply terminal, and the switching element is controlled by a voltage at the input terminal. A diode and a resistor are connected in series between the first power supply terminal and the output terminal. The diode is arranged in a forward conduction direction with respect to the first and second power supply terminals.


REFERENCES:
patent: 4754170 (1988-06-01), Toda et al.
patent: 5034631 (1991-07-01), Mouret
patent: 5107143 (1992-04-01), Ueno et al.
patent: 5132564 (1992-07-01), Fletcher et al.
patent: 5136187 (1992-08-01), Ceccherelli et al.
patent: 5298808 (1994-03-01), Terrell et al.
patent: 5568060 (1996-10-01), Bartholomay et al.
patent: 5852383 (1998-12-01), Rombach
patent: 5852540 (1998-12-01), Haider
patent: 6057702 (2000-05-01), Kamiya
patent: 56-54525 (1981-05-01), None
patent: 62-22121 (1987-01-01), None
patent: 64-73411 (1989-03-01), None
patent: 1-261713 (1989-10-01), None
patent: 2-168310 (1990-06-01), None
patent: 3-250813 (1991-11-01), None
patent: 8-251000 (1996-09-01), None
patent: 9-121148 (1997-05-01), None

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