Telephonic communications – Subscriber line or transmission line interface
Patent
1992-06-22
1994-08-23
Dwyer, James L.
Telephonic communications
Subscriber line or transmission line interface
379106, 379146, 379377, 375 7, 375 25, 375 34, H04M 318, H04M 1100, H04B 110, H04B 1404
Patent
active
053414179
ABSTRACT:
An integrated PCM-CODEC circuit including a plurality of PCM subscriber lines consisting of a SLIC for interfacing a telephone line with a switching system, an impedance conformer and a PCM-CODEC, a common bus for transferring a telephone signal into or from a subscriber according to the time division rule for the timing of telephone line use, a telemetering signal source and a (synchronization signal for controlling portion of the telephone call called by the n'th subscriber. The PCM-CODEC circuit includes a buffer, a signal selector, an applied gain controller, an anti-aliasing filter, a telemetering signal filter, a BPF, a coder, a decoder, a LPF, a received-gain controller, a smoothing filter, an operational amplifier and a telemetering gate.
REFERENCES:
patent: 4007334 (1977-02-01), McDonald
patent: 4591827 (1986-05-01), Nishita et al.
patent: 4677645 (1987-06-01), Kaniwa et al.
patent: 4796296 (1989-01-01), Amada et al.
patent: 5055843 (1991-10-01), Ferguson, Jr. et al.
patent: 5128963 (1992-07-01), Akagiri
Bae Yi-Sung
Hwang In-Hwan
Lee Bang-won
Lee Hye-Kyoung
Bushnell Robert E.
Dwyer James L.
Samsung Electronics Co,. Ltd.
Weaver Scott L.
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