| 摘要 |
PURPOSE:To correct a drift without exerting influence on an input signal whose pulse width is small, by feeding back an amplification output signal through the integrator whose time constant is large, and subtracting it from the input signal. CONSTITUTION:In case when a positive drift has been generated in the output V0, the comparator 6 generates a positive saturation output V, an output v0 of the inverse integrator 7 decreases gradually, and the inverted input voltage of the comparator 3 is decreased by the subtraction resistance circuit 8, by which the output V0 is lowered to the reference voltage. Since the time constant of the inverse integrator 7 is large, the signal V1 is also increased or decreased to some extent by correcting a drift, but its influence is a little since the pulse width is small. |
