Differentiator having digital integrating function |
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| 申请号 | JP18035480 | 申请日 | 1980-12-22 | 公开(公告)号 | JPS57105081A | 公开(公告)日 | 1982-06-30 |
| 申请人 | Toyo Electric Mfg Co Ltd; | 发明人 | NAGAI HIDENORI; | ||||
| 摘要 | PURPOSE:To ensure the even accuracy regardless of the level of a input voltage, by providing a digital integrating function by an up-down counter and applying negative feedback to an operational amplifying circuit. CONSTITUTION:Receiving a voltage input signal Vi, an operational amplifying circuit part 2 delivers a voltage output signal Vo'. This voltage Vo' is applied to an absolute value amplifier 3a and a voltage comparator 3d of an integral arithmetic circuit part 3. Thus an output ¦Vo'¦ is obtained from the amplifier 3a and then applied to a voltage frequency converter 3b to obtain an output SF having a pulse frequency proportional to the voltage ¦Vo'¦ through the comparator 3b. On the other hand, the comparator 3d discriminates the plus or minus of the voltage Vo' and applies a control input signal to a counter 3c. The counter 3c performs the up-counting and down-counting for the output SF when the voltage Vo' is plus and minus respectively. The output of the counter 3c is fed back to the circuit part 2 via a D/A converter 3f. As a result, no error is produced although the input voltage is particularly high. | ||||||
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