JPS57201390A - Character pattern information receiver - Google Patents

Abstract

PURPOSE:To generate an output which has a constant phase relation with a horizontal synchronizing signal invariably, to generate a control signal for the reception of a character pattern multiplex signal and control signal for a memory, and to stabilize a reception state invariably, by providing the 2nd AFC and oscillating circuit in addition to circuits for horizontal deflection. CONSTITUTION:In addition to horizontal AFC and horizontal oscillating circuits 6A and 60 for deflection, horizontal AFC and horizontal oscillating circuits 15A and 150 are provided on the output side of the synchronous separating circuit 5 of a color TV receiver. Those circuits 15A and 150 supply outputs, which have constant phase relations with a horizontal synchronizing signal invariably, to a write clock generating circuit 9. This circuit 9 applies a clock for sampling a received character pattern information signal to a memory control processing circuit 10, and also applies the signal obtained by converting a received detected waveform from a slicing circuit 8 into a binary signal. The circuit 10 generates a control signal for character pattern reception and that for the writing of a memory 12, and by the output of a readout clock generating circuit 11 which inputs the clock of the circuit 60, a readout control signal for the memory 12 is generated.