| 摘要 |
An operating parameter such as temperature or pressure is digitally quantized into a plurality of constant-duration first pulses of corresponding amplitude. The first pulses are employed, over the duration of the first pulses, to continually charge a capacitor, which in turn is coupled across an oscillatory discharge path including a diac or other threshold-operated, negative resistance electronic element. The diac is triggered on when the voltage across the capacitor exceeds a predetermined value, and is triggered off again when the voltage thereacross during discharge corresponds to a second predetermined diminished value across the capacitor, thereby effecting the capacitor discharge as a series of constant amplitude relatively short duration pulses whose number is proportional to the amplitude of the first pulse. Advantageously, the second pulses are coupled via a pulse transformer to a full-wave rectifier, and are then routed to a suitable processor for further utilization.
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