Pulse and Digital Circuits

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, V_po is the quiescent breakdown voltage of the UJT and V_p is the breakdown voltage in the presence of the sync signal. It ...