Title :
Beta Cutoff Frequencies of Junction Transistors
Author :
Lindmayer, J. ; Wrigley, C.Y.
Author_Institution :
Research Labs., Sprague Electric Co., North Adams, Mass.
Abstract :
The 3-db cutoff frequency and the gain-bandwidth product are calculated for the common-emitter current gain. The calculation is made in a simple manner and in general form so as to apply to all transistors. The gain-bandwidth product is shown to be determined by the transit time across the base and the space-charge capacitances. The gain-bandwidth product reaches a maximum for drift transistors at a critical current. This current is given.
Keywords :
Admittance; Capacitance; Character generation; Critical current; Cutoff frequency; Equivalent circuits; Helium; Impedance; Impurities; Voltage;
Journal_Title :
Proceedings of the IRE
DOI :
10.1109/JRPROC.1962.288027
