Pulse and Digital Circuits

12.1 INTRODUCTION

When a time-varying signal, like a sinusoidal signal, is to be displayed on a CRT screen, the signal is applied to the Y -deflecting plates through an amplifier. However, when this time-varying signal is applied to the Y -deflecting plates, what we see on the CRT screen is only a vertical line, because the spot (electron beam) moves only vertically. Though this enables us to measure the peak-to-peak amplitude of the applied signal, this does not allow us to either see its shape or measure its frequency. Thus, to display a time-varying signal on the CRT screen, the spot needs to move linearly along the X -axis as a function of time. The sweep voltage (so called because it sweeps the spot linearly as a function of time along the ...