| 摘要 |
In an controller for effecting bumpless switching between the manual control operation and the automatic control operation there are provided an input impedance connected to receive a measured signal from a processing system, an operational amplifier to provide an output signal to a load, a transfer switch connected between the input impedance circuit and the operation amplifier, a feedback capacitor for the operational amplifier to store a voltage related to the output signal, and a manual setter including means to modify the voltage stored in the feedback capacitor by an external signal. During the automatic adjusting operation the transfer switch is operated to connect the input impedance circuit to the input terminal of the operation amplifier whereas during the control operation by the external signal the transfer switch is operated to disconnect the input impedance circuit from the operational amplifier thus modifying the voltage stored in the feedback capacitor by the signal supplied by the manual controller. |
