
481
triggering pulse has died away. As soon as C
x
has charged
sufficiently to make v
b2
positive, the switch-over from TRj to TR
2
takes place in the same manner as in the astable multivibrator.
There are many uses for this kind of circuit, such as generating
pulses of controllable length, reshaping pulses that have deteriorated
in transmission, and creating adjustable time delays.
25.8 Clampers and Clippers
Fig. 25.17 shows a simple multi-purpose device that we have already
met more than once. It goes by various names according to the
purpose. One of these, known as clamping, is shifting a wave-train
as a whole, lining up either positive or