SHAPING*MIXING CIRCUIT FOR ERASION OF TELEVISION GHOST

摘要

PURPOSE:To secure elimination of the ghost by applying the local oscillation output featuring the phase differences to plural number of mixture circuits and then controlling one mixture circuit with the other mixture circuit. CONSTITUTION:The high-frequency output is divided to be applied to capacitors 1 and 2 each, and at the same time the local oscillation output is divided to be applied to capacitor 4 via the phase-shift circuit as well as to capacitor 3. Voltage waveform 7 is supplied to the base of transistor 5. And with supply of base waveform 8 of transistor 6, the voltage of waveform 9 emerges at the collector of transistor 5. Thus the high-frequency input waveform received the duplicate deformation has the partial amplification and attenuation. As a result, the waveform shaping is carried out to eliminate the ghost.