| 摘要 |
<p>PURPOSE:To exactly operate a signal source by constituting a driving signal generating part so that the generation of a driving signal is continued until a reproducing switch of the signal source to be operated is closed, and it is detected that this signal source is operated actually. CONSTITUTION:When some signal source 30 ends its operation, an operation end signal is supplied to a selecting part 60, and the selecting part 60 connects a signal source 32 to be operated in the next time and a driving signal generating part 50. Simultaneously, the operation end signal is supplied to an energizing signal generating part 42, as well, and the driving signal generating part 50 to which an energizing signal is supplied supplies a driving signal to the signal source 32 to be operated in the next time through the selecting part 60, by which an operating switch of the signal source 32 is closed, and the signal source 32 starts its operation. By such operation, an operation confirming signal is supplied to the driving signal generating part 50, and the generation of a driving signal is stopped. That is to say, the driving generating part 50 continues the generation of the driving signal until it can be confirmed that the signal source to be operated has started its operation.</p> |
