Title :
A note on dc crowding effects in the small-signal distributed transistor model
Abstract :
A distributed transistor model including linear dc crowding is analyzed. An expression for the short-circuit input impedance is derived for the cases of "very small" crowding and "large" crowding. It is found that in both cases the impedance is approximately equal to that of a transistor with no dc crowding and a shorter active base region. The effective length of the base region depends on the degree of crowding.
Keywords :
Admittance; Capacitance; Current distribution; Current supplies; Differential equations; Distributed parameter circuits; Impedance; Linear approximation; Transmission lines; Voltage;
Journal_Title :
Proceedings of the IEEE
DOI :
10.1109/PROC.1968.6593
