Transistor clamp circuit for altering the direct current component of a television signal
阅读：494发布：2023-07-21
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1. APPARATUS FOR ALTERING THE DIRECT CURRENT COMPONENT OF A TELEVISION SIGNAL BEING COMPOSED OF PICTURE SIGNAL COMPONENTS AND FURTHER SIGNAL COMPONENTS, THE PEAK LEVELS OF SAID FURTHER SIGNAL COMPONENTS NOT EXCEEDING THE PEAK LEVELS OF SAID PICTURE SIGNAL COMPONENTS, IN SUCH A WAY THAT THE SIGNAL POTENTIALS CORRESPONDING TO THE PEAK LEVELS OF SAID TELEVISION SIGNAL ARE HELD APPROXIMATELY AT A PREDETERMINED POTENTIAL, SAID TELEVISION SIGNAL BEING CONDUCTED WITHIN A FIRST SIGNAL CHANNEL, COMPRISING IN COMBINATION, A CAPACITOR; A TRANSISTOR; CONNECTION MEANS CONNECTING ONE FIRST POINT OF SAID FIRST SIGNAL CHANNEL WITHIN A SECOND SIGNAL CHANNEL VIA SAID CAPACITOR TO THE BASE OF SAID TRANSISTOR; CONNECTION MEANS CONNECTING THE EMITTER COLLECTOR PATH OF SAID TRANSISTOR WITH A SECOND POINT OF SAID FIRST SIGNAL CHANNEL AND TO A POINT HELD AT SAID PREDETERMINED POTENTIAL; A RESISTOR; AND FURTHER CONNECTION MEANS CONNECTING THE BASE OF SAID TRANSISTOR VIA SAID RESISTOR TO ITS EMITTER.
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