专利汇可以提供Carrier recovery device专利检索,专利查询,专利分析的服务。并且PURPOSE: To improve traceability for input frequency fluctuation between bursts, by compressing the mean frequency fluctuation of an input signal at a carrier recovery circuit, and compressing phase shift generated by the frequency fluctuation between bursts by a phase-locked loop including a demodulation circuit, and a π/2 phase shift circuit.
CONSTITUTION: An error signal is inputted to a smoothing circuit 109, and the noise of which is compressed, and minimizes a phase error between a modulation wave and a recovered carrier that are inputs to the demodulation circuits 105 and 106 by controlling a phase shift circuit 110. The carrier recovery circuit 104 is reset before the arrival of a signal by a control signal from a terminal 115, to prevent the influence of response between the bursts of the carrier rerecovery circuit 104. Therefore, the common fluctuation of an input frequency is compressed by the carrier recovery circuit 104, and fluctuation between the bursts is compressed by the demodulation circuits 105 and 106, and the phase- locked loop including the π/2 phase shift circuit 107. In this way, it is possible to improve the traceability for the frequency fluctuation between the bursts.
COPYRIGHT: (C)1988,JPO&Japio,下面是Carrier recovery device专利的具体信息内容。
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