PCM Encoder

PCM Encoder

PCM Encoder
An audio frequency analog-to-digital converter which outputs the digitised data in serial TTL-level PCM format. Both linear and non-linear (logarithmic) digitising schemes are provided.
Frame synchronisation is implemented by both separate output synchronisation signal and also an embedded code within the serial data stream.
A variable frequency sinuous-type message is provided, which is always synchronised to the input bit clock.
Two PCM ENCODER modules may be connected in parallel, with the appropriate control signal, to establish a two input channel, single data line, Time Division Multiplex system.

Technical Data:
Input Vin: +/-2Vpk, DC coupled
Bit Clock Input: <10kHz, TTL-level
Output Signal serial: TTL-level data stream in offset binary format
Output Format: 8 bits data, including frame synchronization bit as LSB
Digitizing Formats: 7-bits linear; 4-bits linear, and 4-bits companded

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