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

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15.5 SYNCHRONIZATION OF A SWEEP CIRCUIT WITH SYMMETRICAL SIGNALS

So far, we have considered the synchronization of relaxation circuits with external sync signals that are essentially pulses only. However, we can also synchronize a relaxation circuit such as a sweep generator with sync signals that could as well be gradually varying signals like sinusoidal signals. Let us consider the output of a UJT sweep generator that is to be synchronized with a slowly varying sinusoidal signal, as shown in Fig. 15.13(a).

Let it be assumed that the breakdown voltage of the UJT varies sinusoidally in the presence of the sync signal. Here, Vpo is the quiescent breakdown voltage of the UJT and Vp is the breakdown voltage in the presence of the sync signal. It ...

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