Receiving apparatus

Details Receiving apparatus Receiving apparatus

1985-05-22

1986-11-18

Caldwell, Sr., John W.

Communications: electrical

Systems

Selsyn type

34087039, H04M 116

Patent

active

046238719

ABSTRACT:
A receiving apparatus for receiving an electrical signal over a 2-wire transmission line, the electrical signal having a signal component and a bias component, the bias component being used by the receiving apparatus for providing power to the receiving apparatus, the receiving apparatus having a first variable impedance element and a receiving impedance element connected in series across the transmission line, a second variable impedance element and a series impedance element connected in series across the transmission line, and a control circuit for controlling the first variable impedance element to stabilize the voltage across the transmission line to a constant value and for controlling the second variable impedance element to stabilize the current flowing through the series impedance element to a constant value, so that a current flowing through the receiving impedance element relates to the signal component and the current flowing through the series impedance element relates to the bias component.

REFERENCES:
patent: 4400588 (1983-08-01), Stobbs et al.

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