Murata Manufacturing Co., Ltd.

Takao Miyagawa

Hidenobu Sakai

Makoto Yasuda

Ken Hashimoto

William C Kutsche

Akinori Kashio

A terminating resistance circuit is used for a bus line in which a power source line, signal lines and ground lines are connected between computer equipment via terminators, respectively. An input terminal of a regulator is connected to the power source line, and the terminator is connected between an output terminal of the regulator and the signal line. A zener diode is connected between the output terminal and the ground line in such a manner that a cathode terminal and an anode terminal of the zener diode are connected to the output terminal of the regulator and the ground line, respectively.

Terminating resistance circuit

A bus terminating circuit is provided on each of a plurality of SCSI devices connected to each other through an SCSI bus line. A first terminating resistor is inserted between each of the signal lines and a power source line of the bus line and a second terminating resistor is inserted between each of the signal lines and ground. A first transistor is connected between the first terminating resistor and the power source line and a second transistor is connected between the second terminating resistor and ground. The first and second transistors are turned-on or off in response to an ON signal or an OFF signal inputted from an external terminal so that the first and second resistors can be connected or disconnected to or from the bus line.

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Nagaokakyo, Japan

Takao Miyagawa