| 摘要 |
A bumpless transfer process control having three states of operation, namely a digital control state, an analog control state and a manual control state. The control includes an operational amplifier which produces an analog control signal of the process and includes a first and a second feedback capacitor. A switch operates so that the first capacitor is used as storage for the first and third states of operation and the second capacitor is used as an integrator in the second state. In each state of operation the unused capacitor constantly receives a voltage which charges it to a vlaue which enables it to be used abruptly at any time without producing a surge in the amplifier output signal.
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