Interface unit for communication device with parts positioned on

Details Interface unit for communication device with parts positioned on Interface unit for communication device with parts positioned on

1995-05-01

1998-02-17

Marcelo, Melvin

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

375337, 370540, 370544, 370536, H04J 314

Patent

active

057197474

ABSTRACT:
An interface unit having a digital hierarchy interface function for a communication device has parts disposed on a printed-wiring board in a Layout to maintain desired interface unit characteristics. The interface unit includes a plurality of parallel B/U converter blocks for converting bipolar signals in a plurality of channels into a plurality of unipolar signals, respectively, a plurality of parallel U/B converter blocks for converting unipolar signals in a plurality of channels into a plurality of bipolar signals, respectively, a connector disposed near the B/U converter blocks for connecting the B/U converter blocks to an external device, a shared processor LSI circuit connected to the B/U converter blocks and the U/B converter blocks and disposed near the U/B converter blocks, for interfacing the signals in the channels at a low speed, and a printed-wiring board supporting the B/U converter blocks, the U/B converter blocks, the connector, and the shared processor LSI circuit.

REFERENCES:
patent: 4442518 (1984-04-01), Morimoto
patent: 4727541 (1988-02-01), Mori et al.
patent: 4862457 (1989-08-01), Morimoto
patent: 4993013 (1991-02-01), Shinada et al.
patent: 5197068 (1993-03-01), Holien et al.
patent: 5228030 (1993-07-01), Dresher

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