Telephone hybrid circuit

Details Telephone hybrid circuit Telephone hybrid circuit

1996-01-17

1997-02-11

Zele, Krista M.

Telephonic communications

Subscriber line or transmission line interface

Hybrid circuit

379405, 379399, 379345, H04M 900

Patent

active

056029128

ABSTRACT:
A method and apparatus for providing a telephone hybrid function is provided. The present invention maximizes dynamic range while providing a receive signal without interference from a transmit signal. The present invention also provides single-ended to differential conversion. The present invention may be practiced with an integrated circuit powered by a telephone line and coupled to the telephone line without the need for a high voltage isolation barrier between the integrated circuit and the telephone line.

REFERENCES:
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patent: 4433215 (1984-02-01), Wortman
patent: 4485277 (1984-11-01), Minch et al.
patent: 4500755 (1985-02-01), Murto
patent: 4600811 (1986-07-01), Hayashi et al.
patent: 4914693 (1990-04-01), Beck et al.
patent: 4961219 (1990-10-01), Patel
patent: 5068621 (1991-11-01), Hayward et al.
patent: 5202919 (1993-04-01), Kiko
patent: 5479504 (1995-12-01), Nakano et al.
"Electronic Hybrid Telephone Line Pack" IBM Technical Disclosure Bulletin, vol. 16, No. 4, Sep. 1973 pp. 1173-1174.

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