| 摘要 |
<p>PROBLEM TO BE SOLVED: To enhance the accuracy of a polygonal line circuit in conventional scale circuit. SOLUTION: The control circuit is so constituted as to be equipped with a F-V conversion circuit 40 converting the pulse input of a frequency proportional to the vehicle speed into a signal (af) proportional to the frequency, a polygonal line circuit 44 which inputs the output signal of the F-V conversion circuit 40, has arbitrary (m) number of break points fm (m-1, 2,..., n-1, n, n+1,...), and outputs a signal (-abnf+dn) where the inclination of the F-V conversion circuit 40 is multiplied by negative number (-bn=-Cnbn+1) in a range of arbitrary frequencies (fn-1) to (fn), and with a voltage current exchanging means outputting output current proportional to be output voltage of the polygonal line circuit 44. In this case, the output of the F-V conversion circuit 40 is inputted to (m) number of inversion amplifying circuits 43 connected in series where the aforesaid output is multiplied by (bn/bn+1) in response to a range of arbitrary frequencies (fn-1) to (fn), so that the above-mentioned output is thereby multiplied by (-cn) by means of the inversion amplifying circuit 43.</p> |
