| 摘要 |
1,221,364. Transistor pulse amplifier. IWASAKI TSUSHINKI K.K. 19 July, 1968 [21 July, 1967], No. 34618/68. Heading H3T. A pulse amplifier contains two transistors 1, 2 of complementary type having their collectors connected through a diode 3, the transistor 1 operating to amplify a pulse received at 8 without saturating or switching off, and the transistor 2 being switched on, from its normally off state, at the end of the pulse in order to steepen the falling edge of the output pulse. The input pulse is differentiated before being applied to transistor 2 to provide a positive spike to turn on the transistor at the appropriate time. The diode 3 is normally reverse biased, but when transistor 2 turns on, its collector potential falls more rapidly than that of transistor 1, which is turning off, due to the collector capacity of transistor 1; the diode then conducts for a brief period (13, Fig. 3, not shown) to steepen the fall edge of the output pulse (12). |
