Combined kinescope grid and cathode video drive system

In a system for processing a color image representative video signal containing low and high frequency components, said system including a kinescope having an electron gun assembly comprising first and second intensity control electrodes for reproducing an image in response to video signals applied to said electrodes, a kinescope driver amplifier arrangement comprising:

• a first signal processing path including
• means for passing selected high frequency components of said video signal above a given frequency;
• and
• first amplifier means responsive to said selected high frequency components for supplying amplified, selected high frequency components from an output to said first kinescope electrode;
• a second signal processing path having an input coupled to said output of said first amplifier means, and an output;
• a third signal processing path including
• signal combining means having an input for receiving high frequency signals from said output of said second path and having an input for receiving said color representative video signal including said low and high frequency components, for combining said color representative video signal with high frequency output signals from said first path with a sense to significantly attenuate said high frequency components of said video signal at an output of said combining means;
• and
• second amplifier means responsive to output signals from said combining means for supplying amplified video signals to said second kinescope electrode;
• and wherein
• said second signal path exhibits a signal gain substantially equal to the reciprocal of the signal gain of said third signal path between said output of said combining means and said kinescope electrode.

In a system for processing a color image representative video signal containing low and high frequency components, said system including a kinescope having an electron gun assembly comprising first and second intensity control electrodes for reproducing an image in response to video signals applied to said electrodes, a kinescope driver amplifier arrangement comprising:

• a first signal processing path including
• means for passing selected high frequency components of said video signal above a given frequency;
• and
• first amplifier means responsive to said selected high frequency components for supplying amplified, a selected high frequency components from an output to said first kinescope electrode;
• a second siganl processing path having an input coupled to an intermediate point in said first path between said selected frequency passing means and said first amplifier means, and an output;
• a third signal processing path including
• signal combining means having an input for receiving high frequency signals from said output of said second path and having an input for receiving said color representative video signal including said low and high frequency components, for combining said color representative video signal with high frequency output signals from said first path with a sense to significantly attenuate said high frequency components of said video signal at an output of said combining means;
• and
• second amplifier means responsive to output signals from said combining means for supplying amplified video signals to said second kinescope electrode;
• and wherein
• said second signal path exhibits a signal gain substantially equal to the ratio of the signal gain between said intermediate point in said first path and said first kinescope electrode, to the signal gain between said output of said combining means and said second kinescope electrode.

In a color television receiver for processing a color image representative television signal containing low and high frequency components, said receiver including a kinescope having plural electron gun assemblies each comprising a cathode electrode and an associated grid electrode for reproducing an image in response to video signals applied to said electrodes;

• and means for deriving plural color image representative signals including said low and high frequency components from said television signal;
• a kinescope driver amplifier arrangement comprising:
• means for passing selected high frequency components of said television signal above a given frequency;
• amplifier means responsive to said selected high frequency components for supplying amplified, selected high frequency components to said grid electrode of said kinescope;
• plural means for combining said selected high frequency components with each of said plural color representative signals including low and high frequency components, with a sense to significantly attenuate said high frequency component of each of said plural color signals at outputs of said plural combining means;
• and
• plural amplifier means respectively responsive to output signals from said plural combining means, for supplying amplified color signals to said cathode electrodes of said kinescope, respectively.

In a color television receiver for processing a color image representative television signal containing low and high frequency components, said receiver including a kinescope having plural electron gun assemblies each comprising a cathode electrode and an associated grid electrode for reproducing an image in response to video signals applied to said electrodes;

• and means for deriving plural color image representative signals including said low and high frequency components from said television signal;
• a kinescope driver amplifier arrangement comprising:
• means for passing selected high frequency components of said television signal above a given frequency;
• means for coupling said selected high frequency components to said grid electrode with a given amplitude and phase;
• plural means for deriving high frequency signals from said coupling means, and for coupling said derived high frequency signal to said cathode electrodes, respectively, with an amplitude and phase corresponding to the amplitude and phase of said high frequency components coupled to said grid electrode;
• and
• plural means for coupling said color signals including said low and high frequency components to said cathode electrodes, respectively, with a phase such that said high frequency components of said color signals and said derived high frequency signals are in phase opposition at each of said cathode electrodes.