Switchable bus termination and address selector

Details Switchable bus termination and address selector Switchable bus termination and address selector

1989-01-06

1990-04-24

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

340825, 34082553, 370 851, H04J 302

Patent

active

049203398

ABSTRACT:
A switchable termination module for use with addressable devices on a communication bus has a terminator for each signal transmission path, a signal source, for example a switch for signalling whether termination is desired and a terminator control circuit for engaging and disengaging the terminators in response to the signal from the signal source. The control circuit has a transistor between the source of potential and the terminators to couple the terminators to the transmission paths when termination is desired. The switch which signals whether termination is desired may also be used to select the address for the device.

REFERENCES:
patent: 4200862 (1980-04-01), Campbell et al.
patent: 4604618 (1986-08-01), Akiba et al.
patent: 4628315 (1986-12-01), Douglas
patent: 4674085 (1987-06-01), Aranguren et al.
patent: 4682325 (1987-07-01), Heys, Jr. et al.
patent: 4800384 (1989-01-01), Snijders

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