| 摘要 |
<p>PURPOSE:To reduce the cost of configuration to be required when timer operation is executed by providing a charging circuit in the side of a remote controller and using a power source, which is built in a recording equipment, for a charging voltage to the charging circuit. CONSTITUTION:The charging circuit is provided to be composed of a variable resistor VR (resistor for setting recording operation time) to charge power supply +B for recording operation of a VTR to the remote controller with the turning ON of a start/stop switch SW and a charging/discharging capacitor CC. A transistor TR 3 for stop signal output is provided as a means for recording operation stop to be driven by the charging voltage, to be turned ON and to output the change of a collector optential as a stop signal as a result after the lapse of a fixed time, in which the value (time constant) of the charging voltage achieves a prescribed value to be deter mined by product between the resistance value of the variable resistor VR and the capacity value of the charging/discharging capacitor CC after charging operation is started by the charging/discharging capacitor CC in this charging circuit. Thus, when the remote controller is operated, the power source in the side of the recording equipment can be used for driving the timer in the side of the remote controller and the cost is reduced.</p> |
