Electronic digital logic circuitry – Signal sensitivity or transmission integrity – Bus or line termination
Patent
1994-09-02
1995-12-05
Westin, Edward P.
Electronic digital logic circuitry
Signal sensitivity or transmission integrity
Bus or line termination
379398, 379399, H03K 190175
Patent
active
054732654
ABSTRACT:
A circuit configuration for the generation of a line terminating impedance includes a two-wire to four-wire converter having a transfer function. An analog impedance network has a transfer function and input and output sides being connected through the two-wire to four-wire converter to a line. A digital impedance network has a transfer function and is connected in parallel with the analog impedance network through an analog-digital converter unit and a digital-analog converter unit. A real portion of a sum of the transfer function of the analog impedance network and a product of the transfer functions of the analog-digital converter unit, the digital impedance network and the digital-analog converter unit, multiplied by the transfer function of the two-wire to four-wire converter, is greater than -1.
REFERENCES:
patent: 5034978 (1991-07-01), Nguyen
patent: 5274671 (1993-12-01), Johnson
patent: 5287406 (1994-02-01), Kakuishi
patent: 5295186 (1994-03-01), Okamoto
patent: 5305378 (1994-04-01), Svensson
patent: 5402485 (1995-03-01), Takato
Wallnberger Gerald
Zojer Herbert
Greenberg Laurence A.
Lerner Herbert L.
Sanders Andrew
Siemens Aktiengesellschaft
Westin Edward P.
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