| 摘要 |
956,266. Transistor pulse generating circuits. WESTERN ELECTRIC CO. Inc. Dec. 7. 1961 [Dec. 27, 1960], No. 43804/61. Heading H3T. An energy storage device 11 is charged through a Zener diode 19 and inductor 18 and discharged through a switching device 10 so as to produce output pulses 11. The capacitor charges at a rate determined by a resistor 21 until its voltage reaches a value at which the Zener diode 19 becomes substantially non-conductive, whereupon the charging is completed by the collapse of the field of an inductor 18. A bleed resistor 17 maintains the working point of transistor 10 at such a value that a positive pulse 1 at the base will cause avalanche breakdown to occur and the capacitor to discharge. The trailing edge of the triggering pulse causes a diode 3 to conduct and returns the transistor to its initial lightly conducting state so that the capacitor recharges. The inductor prevents a heavy current flow through the transistor from the Zener diode when the transistor is rendered conductive. |
