| 摘要 |
A phase modulator circuit for encoding successive serial binary digits at the zero crossing points of a sine wave carrier. A digital one is encoded as a brief phase deviation of the carrier and a digital zero as the normal wave form. The carrier frequency is one-half the clock frequency of the encoded data. A digital processing circuit operating at one-half the clock frequency of the data controls one shot multivibrators which control electronic switches to deviate the carrier.
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