| 摘要 |
<p>The electronic device includes a high frequency oscillating circuit for supplying high frequency current in the range of from 1 to 2 megacycles per second. The high frequency oscillating circuit automatically reduces the supply power when the load impedance of the person is lowered. The high-frequency oscillating circuit includes an oscillating circuit producing an oscillation signal, a preamplifier boosting the oscillating circuit and an amplifier receiving the boosted oscillating circuit and outputting an amplified oscillating signal. Resonance circuits are provided receiving the amplified oscillating signal and outputs an oscillating signal with resonance at an operating frequency. An output amplifier is preferably connected to the resonance circuit receiving a signal output by the resonant circuit and outputting an amplified at an operating frequency. A high-frequency transformer is provided having a first and second winding and a center housing adjacent the second transformer winding having an aluminum cylinder for dissipating heat and reducing the load inductance of the first and second winding so as to increase the resonance frequency.</p> |
