12.2 EXPONENTIAL SWEEP GENERATORS
In a simple voltage sweep generator, a capacitor (C) is allowed to charge to a voltage (V) through a resistance (R) with the time constant, RC, deciding the rate of charge of the condenser. However, as the capacitor charges exponentially, the resultant sweep voltage so generated may tend to be exponential or in other words, not necessarily linear. Thus, there is a need make arrangements to linearize an exponential sweep. In such arrangements, a constant current is used to charge the capacitor.
The three types of voltage sweep generators considered in this chapter include exponential sweep generators, Miller’s sweep generators, and bootstrap sweep generators.
A simple exponential sweep generator and its output ...