| 摘要 |
A tone burst generator that produces a tone burst at predetermined intervals and operates at low voltage and current levels is described. The tone burst generator comprises a transistorized feedback oscillator circuit that includes a transformer having it's primary and secondary windings connected in series in the feedback path. The frequency of the tone burst is determined by the inductance value of the transformer and the capacitance value of a first capacitor connected in parallel with the secondary winding of the transformer. The tone burst interval is determined by the capacitance value of a second capacitor connected in series with the transformer windings.
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