Color television video signal processing apparatus

Claim 2

Signal-processing apparatus comprising: first and second signal translating means having respective first and second input circuits and first and second output circuits; means for coupling signals extending over a band of frequencies to said first input circuit; said first input circuit comprising a single resonant circuit for separating said signals such that a first portion of said band of frequencies is applied to said first output circuit; means for coupling said resonant circuit to said second input circuit such that a second portion of said band of frequencies is applied to said second output circuit; and means common to said first and second output circuits for developing each of and recombining said first and second portions of said band of frequencies.

Claim 3

Signal-processing apparatus according to claim 1 wherein said single resonant circuit is tuned to said second portion of said band of frequencies.

Claim 4

Signal-processing apparatus according to claim 2 wherein said first and second signal translators include means for controlling the gain of said signal translators relative to each other.

Claim 5

Signal-processing apparatus according to claim 2 wherein said first and second signal translators include means for inverting the phase of one of said portions of said band of frequencies with respect to the phase of said other portion.

Claim 6

Signal-processing apparatus comprising: a first stage including a transistor having input and output circuits; a second stage including a transistor having input and output circuits; means for coupling signals extending over a band of frequencies to said input circuit of said transistor of said first stage, said input circuit comprising a single resonant circuit for separating said signals on a frequency selective basis such that a first portion of said signals are applied to said output circuit of said transistor of said first stage; means for coupling said resonant circuit to said input circuit of said transistor of said second stage such that a second portion of said signals are applied to said output circuit of said transistor of said second stage; and means common to said output circuits of said first aNd second stages for developing each of and recombining said first and second portions of said signals.

Claim 7

Signal-processing apparatus comprising: a first stage including a transistor having input and output circuits; a second stage including a transistor having input and output circuits; means for coupling signals extending over a band of frequencies to said input circuit of said transistor of said first stage, said input circuit comprising a single resonant circuit for separating said signals on a frequency selective basis such that a first portion of said signals are applied to said output circuit of said transistor of said first stage; means for coupling said resonant circuit to said input circuit of said transistor of said second stage such that a second portion of said signals are applied to said output circuit of said transistor of said second stage; and means common to said output circuits of said first aNd second stages for developing each of and recombining said first and second portions of said signals.

Claim 8

Signal-processing apparatus according to claim 5 wherein said signals are coupled to the base electrode of said transistor of said first stage and said single resonant circuit is coupled between the emitter electrode of said transistor and a source of operating potential.

Claim 9

Signal-processing apparatus according to claim 6 wherein said means coupled to said output circuits of said first and second stages comprises a load resistor coupled at one end to the collector electrodes of said transistors in said first and second stages and at the other end to a source of operating potential.

Claim 10

Signal-processing apparatus according to claim 7 wherein there is a resistor coupled between said emitter electrode of said transistor of said first stage and said single resonant circuit.

Claim 11

Signal-processing apparatus according to claim 8 wherein said single resonant circuit comprises a capacitor in parallel with an inductor and wherein said resonant circuit is tuned to a frequency contained within said second portion of said signals.

Claim 12

Signal-processing apparatus according to claim 9 wherein said second portion of said signals is coupled to the base electrode of said transistor of said second stage, the emitter electrode of said transistor being coupled to a source of operating potential and to means including a resistor for controlling the gain of said transistor.

Claim 13

Apparatus for processing color television video signals comprising: a source of color television video signals; first and second gain controlled stages having input and output terminals for processing said video signals; means coupling said source of video signals to an input terminal of said first gain controlled stage; a single resonant circuit for separating said video signals into first and second frequency components without introducing differential phase errors; means coupling said resonant circuit to the input circuits of said gain controlled stages such that said first frequency components are coupled through said first gain controlled stage and said second frequency components are coupled through said second gain controlled stage; means common to said output terminals of said first and second gain controlled stages together for developing each of and recombining said first and second frequency components obtained from said gain controlled stages; and means coupling said common means to said output terminals of said first and second gain controlled stages.

Claim 14

Apparatus for processing color television video signals comprising: a source of color television video signals; first and second gain controlled stages having input and output terminals for processing said video signals; means coupling said source of video signals to an input terminal of said first gain controlled stage; a single resonant circuit for separating said video signals into first and second frequency components without introducing differential phase errors; means coupling said resonant circuit to the input circuits of said gain controlled stages such that said first frequency components are coupled through said first gain controlled stage and said second frequency components are coupled through said second gain controlled stage; means common to said output terminals of said first and second gain controlled stages together for developing each of and recombining said first and second frequency components obtained from said gain controlled stages; and means coupling said common means to said output terminals of said first and second gain controlled stages.

Claim 15

Apparatus for separating and recombining first and second frequency components of a composite signal, comprising: a first signal translating stage; means coupling said composite signal to an input circuit of said first signal translating stage; a single resonant circuit included in the input circuit of said first signal translating stage for providing degeneration for said second frequency components such that only components of said composite signal other than said second frequency components are translated through said first stage; a second signal translating stage having the input circuit thereof coupled to said single resonant circuit for passing said second frequency components through said second stage; and means common to the output circuits of said first and second signal translating stages for developing and recombining said first and second frequency components.

Claim 16

Apparatus for separating and recombining first and second frequency components of a composite signal, comprising: a first signal translating stage; means coupling said composite signal to an input circuit of said first signal translating stage; a single resonant circuit included in the input circuit of said first signal translating stage for providing degeneration for said second frequency components such that only components of said composite signal other than said second frequency components are translated through said first stage; a second signal translating stage having the input circuit thereof coupled to said single resonant circuit for passing said second frequency components through said second stage; and means common to the output circuits of said first and second signal translating stages for developing and recombining said first and second frequency components.

Claim 17

Apparatus according to claim 12 wherein said first signal translating stage includes a transistor operated in the common emitter mode and said single resonant circuit is coupled in the emitter circuit thereof for providing degeneration for said second frequency components.

Claim 18

Apparatus according to claim 13 wherein said second signal translating stage includes a transistor operated in the common emitter mode and having its base circuit coupled to said single resonant circuit and wherEin said means common to said first and second signal translating stages includes a common load resistor coupled to the collector electrodes of said transistors.

Claim 19

Apparatus according to claim 13 wherein said second signal translating stage includes the cascaded arrangement of first and second transistors operated in the common collector and common base modes, respectively, and wherein the base electrode of said first transistor is coupled to said single resonant circuit and the collector electrode of said second transistor is coupled to said means common to said output circuits of said first and second signal translating stages.