O'Reilly logo

Pulse and Digital Circuits by Manmadha Rao G., Rama Sudha K., Venkata Rao K.

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

12.3 IMPROVING SWEEP LINEARITY

A simple exponential sweep generator shown in Fig. 12.9(a) essentially produces a non-linear sweep voltage, unless τ >> TS or V >>Vs. In an exponential sweep generator, since the capacitor charges exponentially, the resultant sweep so generated is non-linear. To get a linear sweep, the capacitor is required to charge with a constant current. Let us consider the methods of linearizing an exponential sweep. Introduce an auxiliary generator, v, as shown in Fig. 12.9(b). If v is always kept equal to the voltage across C(i.e.,v = vC), as the polarities of v and vC are opposite, the net voltage in the loop is V. Then i = V /R which is a constant. That means, the capacitor charging current is constant and perfect linearity ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required