| 摘要 |
PURPOSE:To set easily an optional waveform with simple constitution by adding the 1st 3rd reference voltages with weighting. CONSTITUTION:An operational amplifier A1 amplifies a voltage difference between the 2nd reference voltage V1 and the 1st and 3rd reference voltages W (V0, V2) subject to weighting and the result is fed to each voltage dividing point of a voltage divider D1 via distribution resistors R1h-R1j. Thus, the voltage of each voltage dividing point of the voltage divider D1 changes from the state that it is distributed at an equal interval (linearly) between the 1st and 2nd reference voltages V0 and V1 to the state that it is distributed at an unequal interval (nonlinearly) by addition with weighting. A nonlinear waveform by a step wave approximation appears at an output terminal OUT as shown in solid lines through the sequential closing of step switches St-S14. A linear step wave shown in broken lines in the figure is obtained by making the distribution resistors R1hR1j infinite. |
