H - Electricity – 04 – N
Patent
H - Electricity
04
N
330/37, 350/67
H04N 9/72 (2006.01)
Patent
CA 1061890
Abstract of the Disclosure An amplifier for driving a color image reproducing device includes a first transistor the base of which is capacitively coupled to a source of color difference signals. The emitter of the first transistor is direct current coupled to the base of a second transistor. The collector of the second transistor is direct current coupled to the base of the first transistor. The emitter of the second transistor is coupled to a source of a predetemined voltage. The emitter of the first transistor is direct current coupled to the emitter of a third transistor of opposite conductivity type which serves as a luminance signal ampli- fier. The first and third transistors form a matrix amplifier operative to generate a color signal at the collector of the first transistor. The capacitive coupling device and the second transistor form a clamping circuit for maintaining the voltage developed at the emitter of the first transistor substantially independent of direct current conditions of the source of color difference signals and base-to-emitter voltage variations of the first transistor. -1-
733386
Na
Rca Corporation
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