| 摘要 |
<p>PURPOSE:To generate a constant high-frequency pulse in a cycle irrespective of the surface conditions of a user's body, by providing a counter circuit which counts a high-frequency magnetic pulse and, when counting a preset number of the pulses, stops the generation of a high-frequency generation circuit. CONSTITUTION:A high-frequency generation circuit 2 has a reset input R1. A low-frequency pulse circuit 3 is connected to a reset input R2 of a counter circuit 4 for counting a high-frequency pulse outputted from the high-frequency generation circuit 2. The counter circuit 4 generates an H-level signal from its output Q in reset conditions and, when counting a preset number of the high-frequency pulse in non-reset condition, generates an L-level signal from the output Q. Even if a resonant frequency of the high-frequency generation circuit 2 varies due to the surface conditions of a user's body, only the duration time t1' of the high-frequency pulse varies in the range of a time t1 but the number of the high-frequency pulses in a cycle (intermittent cycle) of the low-frequency pulse circuit 3 remains constant.</p> |
