Method and apparatus for wired signal transmission

Abstract

A method and apparatus for high quality signal transmission, which utilizes normal-mode current flow and produces an audio output signal with suppression of normal-mode voltage amplitude, comprising transmitting an audio input signal source though (1) a buffer amplifier; (2) a modulated current source; (3) a pair of wires; (4) a current transformer; and (5) a receiver amplifier for said current transformer.

What is claimed is: 
     
         1 . An apparatus for high quality signal transmission generally in the sub-audio to video range by means of normal-mode current flow with suppression of normal-mode voltage amplitude signal comprising a transmitter and a receiver connected by a pair of wires. 
     
     
         2 . The apparatus in  claim 1  wherein said transmitter is comprised of a non-inverting buffer amplifier, an inverting buffer amplifier and a modulated current source. 
     
     
         3 . The apparatus in  claim 1  wherein said receiver is comprised of a current transformer and a receiver amplifier for current transformer. 
     
     
         4 . The apparatus in  claim 2  wherein said modulated current source is single-ended. 
     
     
         5 . The apparatus in  claim 2  wherein said modulated current source is symmetrical with respect to the common terminal of said transmitter. 
     
     
         6 . The apparatus in  claim 2  wherein said modulated current source comprises a voltage source and a sufficiently large series resistance. 
     
     
         7 . The apparatus in  claim 6  wherein said voltage source is single-ended. 
     
     
         8 . The apparatus in  claim 6  wherein said voltage source is symmetrical with respect to the common terminal of said transmitter. 
     
     
         9 . The apparatus in  claim 1  wherein said receiver is comprised of a current transformer and a receiver amplifier for said current transformer. 
     
     
         10 . The apparatus in  claim 9  wherein said receiver amplifier has essentially zero input impedance. 
     
     
         11 . A method of high quality signal transmission, which utilizes normal-mode current flow and produces an audio output signal with suppression of normal-mode voltage amplitude, comprising transmitting an input signal source though (1) a buffer amplifier; (2) a modulated current source; (3) a pair of wires; (4) a current transformer; and (5) a receiver amplifier for said current transformer. 
     
     
         12 . The method in  claim 11  wherein said modulated current source is single-ended. 
     
     
         13 . The method s in  claim 11  wherein said modulated current source is symmetrical with respect to the transmitter common terminal. 
     
     
         14 . The method in  claim 12  wherein said modulated current source comprises a voltage source and a sufficiently large series resistance. 
     
     
         15 . The method in  claim 11  wherein said voltage source is single-ended. 
     
     
         16 . The method in  claim 11  wherein said voltage source is symmetrical with respect to the common terminal of the transmitter. 
     
     
         17 . The method in  claim 11  wherein said receiver amplifier has essentially zero input impedance.