AbstractsEngineering

A particular application requires a voltage pulse of l/100th microsec. duration, 30 volts amplitude and 100 kc/sec. recurrence frequency. Methods usually employed for low-frequency, microsecond duration impulses are found inadequate. The author analyzes, using the La Place transform theory, the transient response of two circuits. The differentiating circuit is found impractical. Class C operation of a pentode, having sinusoidal input, with a parallel LC plate circuit can give the desired pulse. For analysis an idealized plate current-grid bias characteristic is used. The transient response of a 6 mc/sec. circuit to a 700 kc/sec. input was measured. Definite values of Gm and Eco can be obtained from measured Ip - Eg curves which give correlation between calculated and experimental transient response. The calculated pulse output at 33 mc/sec. based on the ideal Ip - Eg curve is verified by experiment.