| 摘要 |
<p>PURPOSE:To make the titled circuit lightweight, to reduce its power consumption and to simplify integrated circuit formation by connecting one output terminal of the circuit to a two output DC/DC converter and the other output terminal to an input terminal of an adder and setting a switching element which performs opening/closing control in accordance with an output from an comparator. CONSTITUTION:A positive terminal of a battery 200 is connected to ground. In a transformer 204, a winding 201 is connected to the negative terminal of the battery, a winding 202 is wound around the same winding core as that of the winding 201 and one end of a winding 203 is connected to the ground. The transformer 204 is sufficiently miniaturized by increasing the switching frequency of a transistor TR 205. If the gain of a current output circuit 211 is selected so as to be reduced, power consumption can be reduced, improving transition characteristics due to the change of load by the operation of a switching element 230 and generating fine dial pulse receiving characteristics.</p> |
