Augment the astable multivibrator circuit of Fig. 18.26(b) with an output limiter of the

Chapter 18, Problem 18.39

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Augment the astable multivibrator circuit of Fig. 18.26(b) with an output limiter of the type shown in Fig. 18.25(b). Design the circuit to obtain an output square wave with 5-V amplitude and 1-kHz frequency using a 10-nF capacitor C. Use = 0.462, and design for a current in the resistive divider approximately equal to the average current in the RC network over a half-cycle. Assuming 13-V op-amp saturation voltages, arrange for the zener to operate at a minimum current of 1 mA. Specify the values of all resistors and the zenor voltage.