Environmental Engineering Reference
In-Depth Information
2.6 COMMON Z (COLLECTOR/DRAIN)
The
common Z
amplifier, shown in Fig. 2.9a, is used as voltage follower
(or as level shifter). Its input is located at the Y terminal and the output is at
the X terminal. The usual topology of the common Z amplifier is
implemented without resistance but to develop general relationships we
include this resistance and only in the final step do we simplify the equations
by eventually setting its value to zero.
Except for the different designation of resistances at terminals X and Z,
the calculation of the input resistance leads to exactly the same relationship
