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4. 发明专利

JPH03135724A SYNCHRO/DIGITAL CONVERTER 失效
公开(公告)号：JPH03135724A
公开(公告)日：1991-06-10
申请号：JP19685989
申请日：1989-07-31
申请人： ANRITSU CORP
发明人： HIKIZAKI TAKESHI
IPC分类号： G01C19/32 , G01D5/245 , H03M1/64
摘要： PURPOSE:To quicken an action by simple constitution and to follow up high- speed synchro rotation by comparing the voltage of a synchro signal with a reference voltage so that the magnitude of the voltage may be decided, inputting a maximum signal which is taken as an REF signal and a next magnitude signal which is taken as an IN signal in an AD converter and outputting a synchro position. CONSTITUTION:Analog switches 2 and 3 are controlled in synchronism with a zerocross detector 8 so as to compare the voltage of the synchro signals S1-S3 with the reference voltage of a reference voltage generator 5, make the output of the analog switch 2 all positive, decide the magnitude of the voltage and add the maximum signal and the next magnitude signal to the AD converter 6 by taking the maximum signal as the REF signal and the next magnitude signal as the IN signal. A CPU 7 sets a previous selection signal as a high-order bit and the output of the CPU 7 as a low-order bit and corrects the data of the low-order bit to output the synchro position. In such a method, division or multiplication need not be performed in the CPU 7, thereby following up the high-speed synchro rotation.

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