Below shown circuit diagram is the simplest pulse position modulation circuit using IC-555. With this type of circuit, the position of each pulse changes. Both width and period of the pulses vary with ...

1: NRZ signal (top) and eye diagram (bottom). Pulse amplitude modulation builds ... by increasing the modulation level of the signal (M). C = 2*B*log2(M) The PHY circuit of a chip encodes serial data ...