Impulse Current Source
Original Publication Date: 1988-Jul-01
Included in the Prior Art Database: 2005-Feb-15
Circuitry has been proposed for generating an impulse of current which could be used to discharge highly capacitive lines in semiconductor devices. In a conventional circuit for generating a current pulse (Fig. 1) VR provides the DC bias to transistor T1 through the resistor divider network, R1 and R2. The coupling capacitor, C1, couples an input pulse to the base of the transistor resulting in a current spike at node C. In order to provide the maximum voltage transfer from node A to node B, the capacitive impedance must be low and the parallel combination R1/R2 must have a high impedance.