| 摘要 |
<p>The oscillation generator includes an oscillator circuit, a pushpull amplifier with inductive positive feedback connected in the circuit, a piezoceramic atomizer vibrator element, and a loaddependent regenerative feedback coupling connected to the circuit. The coupling is in the form of a tuneable frequency-selective sensor, such as a parallel resonance circuit, having outputs connected to the inputs of the amplifier. A positive feedback transformer may be connected to the output of the amplifier and to a selective circuit which includes the vibrator element and a resonance circuit and which is connected in series with the parallel resonance circuit. The amplifier may be a differential, transistor amplifier. The oscillation generator is used in inhalators, fuel atomizers, humidifiers and ink atomizers, etc. As compared to prior art devices, the invention uses fewer parts, and is less affected by load changes, so that it will start reliably and will only operate at the atomizer resonance.</p> |
