Cross-track distributor for video signals

Claim 2

A cross-track distributor for television signals, comprising, in combination, a group of input conductors receiving the input signals to said distributor; a group of output conductors for furnishing the output signals of said distributor; and a plurality of electronic switching means each connecting an associated one of said input conductors to an associated one of said output conductors when in a conductive state, each of said electronic switching means comprising a T network having a first, second and third diode, said first and second diodes constituting the longitudinal branch of said T network, said electronic switching means further comprising a first and second transistor decoupling stage connected, respectively, before said first and second diode in the direction of signal flow from said associated input to said associated output conductor.

Claim 3

The cross-track distributor as defined in claim 1 including voltage dividing means with tap connected to the center point of said T network.

Claim 4

The cross-track distributor as defined in claim 2 wherein one branch of said voltage dividing means comprises a first resistor, and the other branch of said voltage dividing means comprises a second resistor connected in series with a transistor.

Claim 5

The cross-track distributor as defined in claim 1 including a first transistor; a first terminal connected to one of said first group of conductors; a first transistor; a first resistor connected between said first terminal and the base of said first transistor; a first diode connected to the emitter of said first transistor; a second transistor; a second resistor connected between the base of said second transistor and said first diode; a second diode connected to the emitter of said second transistor; a second terminal connected to said second diode and to one of said second group of conductors; a third diode connected to the junction of said first diode and said second resistor; a third resistor connected between the collector of said first transistor and the junction of said first diode and said second resistor; a third transistor; a fourth resistor connected between the collector of said third transistor and the junction of said first diode and said second resistor; a third terminal for applying a control signal thereto; a fifth resistor connected between the base of said third transistor and said third terminal; an emitter-resistor connected to the emitter of said first transistor; and an emitter-resistor connected to the emitter of said second transistor.

Claim 6

A cross-track distributor as defined in claim 1, wherein said electronic switching means comprise integrated circuits.

Claim 7

A cross-track distributor as defined in claim 1, wherein said transistor decoupling stage and said additional transistor decoupling stage each comprise an emitter follower stage.

Claim 8

A cross-track distributor as defined in claim 1 including strip-shaped plates for carrying said group of input conductors and said group of output conductors; a base plate arranged perpendicular to the longitudinal edges of said strip-shaped plates, said strip-shaped plates for carrying said group of input conductors being arranged on one side of said base plate and said strip-shaped plate for carrying said group of output conductors being arranged on the other side of said base plate and perpendicular to the dIrections of said strip-shaped plates for carrying said group of input conductors, one of said strip-shaped plates carrying said switching means.

Claim 9

The cross-track distributor as defined in claim 7 wherein said first group of input conductors and said group of output conductors are in printed circuit form on said strip-shaped plates.

Claim 10

The cross-track distributor as defined in claim 8 including a further plate perpendicular to said base plate at oppositely lying edges of said base plate for carrying input amplifiers in printed circuit form.

Claim 11

The cross-track distributor as defined in claim 9 including output stages in said input amplifiers for impedance conversion, said output stages being arranged substantially at the center of said strip-shaped plate for carrying said group of input conductors.

Claim 12

The cross-track distributor as defined in claim 8 including strip-shaped plates for carrying the control lines for said switch means in printed cable harness form, said strip-shaped plates for said control lines being mounted perpendicular to said base plate and at the longitudinal edges of said base plate.

Claim 13

The cross-track distributor as defined in claim 8 including output amplifying means in printed circuit form and carried by said base plate on the side at which said plates for carrying said first group of conductors are arranged.

Claim 14

The cross-track distributor as defined in claim 1 wherein said group of input conductors and said second group of conductors comprises each twenty conductors within an enclosure of predetermined dimensions.