| 摘要 |
PURPOSE:To miniaturize and simplify the circuit constitution by switching a phase locked loop for continuous wave and a reference carrier regenerated circuit. CONSTITUTION:A branch circuit 1 divides a 2-phase PSK signal, the result is detected by phase detectors 2a, 2b, discriminated by discriminators 3a, 3b and converted into a binary digital signal. The signals are synthesized by an EX- NOR4 via a logical circuit 14, filtered by a low pass filter 5, a voltage controlled oscillator is controlled and the result is branched by a 0-pi/2 branch circuit 7. When an external control signal A is at ''HI'' level, a phase locked loop is constituted and when ''LO'', a carrier regenerating circuit is constituted. |
