| 摘要 |
PURPOSE:To omit any auto-offset cancel circuit and any inverter circuit, simplify the circuit configuration, and shorten the distance measuring time due elimination of the auto-offset motions. CONSTITUTION:An integrating circuit for a distance measuring device includes switch means 1, 2, 3, 4, which are to connect an integrating amplifier 6 with an integrating capacitor 10, and a control means 9 which controls these switch means in accordance with positive/negative of the AC signal fed synchronously and changes over the connecting direction of the integrating capacitor 10 to the integrating amplifier 6. The connecting direction of the capacitor 10 to the amplifier 6 is changed over from the time, when the AC signal fed synchronously is positive, to the time it is negative, and vice versa, and thereby auto- offset cancel takes place, and at the same time, integration in the (-)-direction is conducted whether the input signal is positive or negative. |
