Principles of Synchronous Digital Hierarchy

106 Principles of Synchronous Digital Hierarchy

however are out of the scope of this text and not really important for the

present discussion.)

Figure 5.6 depicts schematic diagram of an astable multivibrator and its

waveform. The output waveform of multivibrator is not a true square wave

and therefore requires wave shaping to get a true square wave clock.

This clock is able to generate any frequency ranging from a few cycles to

many megacycles. The frequency depends upon the values of the resistor

and capacitor (R and C, respectively) components. The accuracy of this clock

depends upon the accuracy of the components, i.e., R and C. The frequenc ...