Device for the transmission of push-pull signals

Claim 2

Apparatus for the transmission of digital push-pull signals, comprising: a push-pull transmitter for emitting driving pulses; a bistable push-pull receiver responsive to coupling pulses to emit push-pull signals to be transmitted; and a push-pull directional coupler interposed between said transmitter and said receiver, said push-pull directional coupler responsive to said driving pulses to produce coupling pulses to set and reset said receiver causing emission of said push-pull signals, said directional coupler comprising at least six parallel conductors which include a first pair of conductors each connected at one end thereof to said transmitter, a second pair of conductors each connected at one end thereof to said receiver, the conductors of said first and second pairs symmetrical about a plane, and a pair of grounded conductors arranged outside of said first and second pairs of conductors and symmetrically about the same plane, each of the grounded conductors having a width that is several times greater than the width of the other conductors, and first and second impedances equal to the surge impedances of the respective first and second pairs of conductors and connected across the other ends of the respective pairs of conductors.

Claim 3

Apparatus for the transmission of digital push-pull signals, comprising: a push-pull transmitter for emitting driving pulses; a bistable push-pull receiver responsive to coupling pulses to emit push-pull signals to be transmitted; and a push-pull directional coupler interposed between said transmitter and said receiver, said push-pull directional coupler responsive to said driving pulses to produce coupling pulses to set and reset said receiver causing emission of said push-pull signals, said directional coupler comprising at least five parallel conductors, at least one of said conductors connected to ground; a first pair of said conductors connected at first ends thereof to said transmitter with the conductors of said first pair equal distances from said grounded conductor, a second pair of said conductors connected at first ends thereof to said receiver with the conductors of said second pair equal distances from the grounded conductor, and first and second impedances, said first impedance connected across the second ends of said first pair of conductors, said second impedance connected across the second ends of said second pair of conductors, each of said impedances corresponding to the respective surge impedances of the pairs of conductors.

Claim 4

Apparatus for the transmission of digital push-pull signals, comprising: a push-pull transmitter for emitting driving pulses; a bistable push-pull receiver responsive to coupling pulses to emit push-pull signals to be transmitted; and a push-pull directional coupler interposed between said transmitter and said receiver, said push-pull directional coupler responsive to said driving pulses to produce coupling pulses to set and reset said receiver causing emission of said push-pull signals, said directional coupler comprising at least five parallel conductors, at least one of said conductors connected to ground; a first pair of said conductors connected at first ends thereof to said transmitter with the conductors of said first pair equal distances from said grounded conductor, a second pair of said conductors connected at first ends thereof to said receiver with the conductors of said second pair equal distances from the grounded conductor, and first and second impedances, said first impedance connected across the second ends of said first pair of conductors, said second impedance connected across the second ends of said second pair of conductors, each of said impedances corresponding to the respective surge impedances of the pairs of conductors.

Claim 5

Apparatus according to claim 2, wherein all of said conductors lie in the same plane.

Claim 6

Apparatus according to claim 2, wherein said grounded conductor is a conductive layer having a width which is several times the width of the conductors of the pairs of conductors, and wherein the conductors of each pair are arranged symmetrically about the grounded conductor with one conductor of the first pair lying next to one conductor of the second pair on each side of the grounded conductor.

Claim 7

Appartus according to claim 2, wherein said coupler comprises an odd number of conductors arranged in the same plane, the central conductor being the grounded conductor and the pairs of conductors arranged symmetrically with respect to the grounded conductor with the conductors of the second pair arranged outermost in the plane.

Claim 8

Apparatus according to claim 5, comprising an additional pair of grounded conductors arranged outboard of the second pair of conductors and symmetrically with respect to the central grounded conductor to reduce the surge impedance of said second pair of conductors.