Circuit for controlling resistance comprising two transistor pairs, for gain control, PIN diode, modulator etc. has emitter of one transistor connected to collector and base of other transistor

摘要

The two collectors of the first transistor pair (T1,T2) and the two bases of the first transistor pair (T1,T2) are connected to a connection point (D). The two emitters of the second transistor pair (T3,T4) are connected to a connection (A'). The emitter of the second transistor (T2) of the first transistor pair and the collector and the base of the second transistor (T4) of the second transistor pair are connected to a second connection (A). An Independent claim is also included for a method of controlling a resistance produced by transistors.