Answered: 15 V LF411 Vout 20 kΩ 15 V Vin 5 V Fig.…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Question

It is understood that the voltage comparators can utilise either a no-feedback
(open-loop) operation or a positive-feedback operation. The op-amp LF411 is a
high-speed comparator and for a circuit utilising it (shown in Fig. A2c), assume
that an input (Vin) with 10 V peak amplitude at 1 Hz frequency is being applied.
Please describe and draw the comparator output (Vo) by clearly labelling axes,
threshold voltages and the saturation voltages in your sketch. Also show any
supporting calculations including the calculation of Vref at the non-inverting
terminal.

15 V
LF411
Vout
20 kn
15 V
_5 V
Fig. A2c: Open-loop comparator circuit
10 kn

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