| 摘要 |
1512136 Analogue-digital coder-decoder COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCATEL SA 5 Oct 1976 [17 Oct 1975] 41336/76 Heading H3H In an analogue-digital coder-decoder, coding of an analogue input sampled at 7 is performed by the successive approximation method by a loop comprising a comparator 4, register 2 and D-to-A converter 1, and the coding loop is interruptible at any time by a multiplexer 5 to allow a digital input Ed to be decoded by the D-to-A converter 1, any partially completed coding being retained in the register 2 ready for resumption of coding upon completion of decoding. Coding and decoding are at the same sample rate, but asynchronous. |
