
Principles of Analog Electronics
492
increased input capacitance increases the lower cutoff frequency and so reduces
the bandwidth.
Curiosity
The Miller effect is cited for the rst time in John M. Miller’s paper, “Dependence
of the input impedance of a three-electrode vacuum tube upon the load in the
plate circuit,” Scientic Papers of the Bureau of Standards, vol. 15, no. 351,
pages 367–385, 1920.
The cascode conguration combines a C.E. and a C.B. to reduce the problems
coming from the Miller effect. In fact, C.E. provides a relatively low voltage gain
because it is reduced by the low input impedance of C.B., which acts as a load for
C.E. (see ...