| 摘要 |
<p>A transistor-based oscillator, comprising two transistors configured as amplifier stages and coupled by a common emitter resistor, by offering an inductive coupling between the output circuits and the input circuits, permits the generation of sawtooth pulses, of increasing amplitude and higher and higher frequency, giving characteristic audible signals and luminous flashes, used ideally in an appliance intended to signal persons in distress. <IMAGE></p> |
