| 摘要 |
<p>SYNCHRONOUS ENCODER A synchronous encoder includes a 3-stage shift register, polarity control circuits, output gates, and unipolar-to-bipolar converter for producing a B3ZS bipolar signal from a binary input data signal. A detector detects occurrences of three consecutive zeros in the data signal, and upon each such detection modifies the data passing through the shift register to produce a desired bipolar code violation pulse and clears a parity circuit. The parity circuit controls the output gates to maintain an odd number of pulses between successive violation pulses of the bipolar signal.</p> |
