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Phase synchronous oscillation circuit

阅读:939发布:2021-08-30

专利汇可以提供Phase synchronous oscillation circuit专利检索,专利查询,专利分析的服务。并且PURPOSE:To shorten the synchronization time and to stabilize an oscillation frequency by using a phase comparator circuit, an up-down counter, a D/A converter, an oscillation circuit, a N-scale counter, and a setting circuit. CONSTITUTION:Once synchronization start signal B is applied to terminal Y, setting circuit 6 generates signal by input signal A applied to terminal X, up-down counter IC0 is set according to states of input terminals D0 to D3, and N-scale counter 5 is reset. Corresponding to input clocks, counter IC0 outputs output states of 2 , 2 , 2 , and 2 from output terminals Q to Q3. According to the number of input clocks, D/A converter circuit 3 develops analog voltage F, and resistances R0 to R10 are set so as to make voltage-control crystal oscillation circuit 4 oscillate at a fixed frequency, thereby shortening the synchronization time. The oscillation output is counted down by counter 5 and compared by phase comparator 1 with input signal A and signals D and E are generated depending upon the value of the frequency to let counter IC0 cout down or up, thereby controlling the frequency by the corresponding output voltage of circuit 3.,下面是Phase synchronous oscillation circuit专利的具体信息内容。

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