Arrangement for color television receiver

Claim 2

A video amplifier circuit arrangement for a color television receiver, comprising a video amplifier circuit including a highfrequency compensating peaking coil, a diode connected in parallel with said peaking coil, means connected to a DC power supply circuit of a color band signal amplifier controlled by a color killer signal for providing a first DC bias voltage during reception of black-and-white television broadcast and a second DC bias voltage different from the first bias voltage during reception of color television broadcast, and electrical conductor means supplying said first and second bias voltages to said diode, wherein said diode is rendered nonconductive by said first bias voltage during reception of black-and-white television broadcast while during reception of color television broadcast diode is rendered conductive by said second bias voltage so that said peaking coil is short-circuited therethrough.

Claim 3

A video amplifier circuit arrangement for a color television receiver, comprising a video amplifier circuit including a trap circuit constituted by a coil and a capacitor, a diode connected in parallel with said trap circuit, means connected to a DC power supply circuit of a color band signal amplifier controlled by a color killer signal for providing a first DC bias voltage during reception of black-and-white television broadcast and electrical conductor means supplying said first and second voltages to said diode, wherein said diode is rendered conductive by said first bias voltage during reception of black-and-white television broadcast so that said trap circuit is short-circuited therethrough, while during reception of color television broadcast said diode is rendered nonconductive by said second bias voltage.

Claim 4

A video amplifier circuit arrangement for a color television receiver, comprising a video amplifier circuit including a trap circuit constituted by a coil and a capacitor, a diode connected in parallel with said trap circuit, means connected to a DC power supply circuit of a color band signal amplifier controlled by a color killer signal for providing a first DC bias voltage during reception of black-and-white television broadcast and electrical conductor means supplying said first and second voltages to said diode, wherein said diode is rendered conductive by said first bias voltage during reception of black-and-white television broadcast so that said trap circuit is short-circuited therethrough, while during reception of color television broadcast said diode is rendered nonconductive by said second bias voltage.

Claim 5

A video amplifier circuit arrangement according to claim 1 wherein said peaking coil is a series-peaking coil.

Claim 6

A video amplifier circuit arrangement according to claim 1 wherein said peaking coil is a shunt-peaking coil.

Claim 7

A video amplifier circuit arrangement for a color television receiver, comprising a video amplifier circuit including a high-frequency compensating series-peaking coil, a high-frequency compensating shunt-peaking coil coupled or not coupled to said series-peaking coil, a pair of diodes respectively connected in parallel with said series-peaking coil and shunt-peaking coil respectively, means connected to a DC power supply circuit of a color band signal amplifier controlled by a color killer signal for providing a first DC bias voltage during reception of black-and-white television broadcast and a second DC bias voltage during reCeption of color television broadcast, and electrical conductor means connecting said first and second bias voltages to said diodes, wherein said diodes are rendered nonconductive by said first bias voltage during reception of black-and-white television broadcast while during reception of color television broadcast said diodes are rendered conductive by said second bias voltage so that said series-peaking coil and shunt-peaking coil are short-circuited therethrough respectively.

Claim 8

A video amplifier circuit arrangement for a color television receiver, comprising a video amplifier circuit including a high-frequency compensating series-peaking coil, a high-frequency compensating shunt-peaking coil coupled or not coupled to said series-peaking coil, a pair of diodes respectively connected in parallel with said series-peaking coil and shunt-peaking coil respectively, means connected to a DC power supply circuit of a color band signal amplifier controlled by a color killer signal for providing a first DC bias voltage during reception of black-and-white television broadcast and a second DC bias voltage during reCeption of color television broadcast, and electrical conductor means connecting said first and second bias voltages to said diodes, wherein said diodes are rendered nonconductive by said first bias voltage during reception of black-and-white television broadcast while during reception of color television broadcast said diodes are rendered conductive by said second bias voltage so that said series-peaking coil and shunt-peaking coil are short-circuited therethrough respectively.

Claim 9

A video amplifier circuit arrangement according to claim 1 wherein a capacitor is connected in parallel with said peaking coil to constitute a trap circuit with the coil.

Claim 10

A video amplifier circuit arrangement according to claim 2 wherein a series-peaking coil is connected to said trap circuit in series relationship thereto.

Claim 11

A video amplifier circuit arrangement according to claim 2 wherein a shunt-peaking coil is connected to said trap circuit in parallel relationship thereto.

Claim 12

A video amplifier circuit arrangement according to claim 2 wherein a series-peaking coil and a shunt-peaking coil are connected to said trap circuit in series and parallel relationship thereto respectively.

Claim 13

A video amplifier circuit arrangement according to claim 1 comprising a color signal band amplifier which is operative and inoperative during reception of color television broadcast and black-and-white television broadcast respectively, and including a resistor across which said first and second DC bias voltages are obtained during reception of black-and-white television broadcast and color television broadcast respectively.

Claim 14

A video amplifier circuit arrangement according to claim 1 including a pair of capacitors which connect said diode across the peaking coil so that a trap circuit is established by the peaking coil and the capacitors when said diode is rendered conductive.