Two op-amp circuits are shown in Figure 2. One of them is an inverting amplifier and the other is a Schmitt trigger. Assume the op-amps used in both circuits are ideal op-amps. The output of the Schmitt trigger is switching between -12 V and +12 V (i.e., Vmax=+12V). a) b) c) Identify which is the inverting amplifier and which is the Schmitt trigger. Use the corresponding circuit diagram in Figure 2 to design an inverting amplifier that has a gain of -20 with the output offset voltage minimised. Determine the values of the resistors. Select the corresponding circuit diagram in Figure 2 to design a Schmitt trigger that has a lower trigger level of -1 V and an upper trigger level of +2 V. Determine the values of resistors. Sketch the transfer characteristics of this trigger.

Two op-amp circuits are shown in Figure 2. One of them is an inverting amplifier and the other is a Schmitt trigger. Assume the op-amps used in both circuits are ideal op-amps. The output of the Schmitt trigger is switching between -12 V and +12 V (i.e., Vmax=+12V). a) b) c) Identify which is the inverting amplifier and which is the Schmitt trigger. Use the corresponding circuit diagram in Figure 2 to design an inverting amplifier that has a gain of -20 with the output offset voltage minimised. Determine the values of the resistors. Select the corresponding circuit diagram in Figure 2 to design a Schmitt trigger that has a lower trigger level of -1 V and an upper trigger level of +2 V. Determine the values of resistors. Sketch the transfer characteristics of this trigger.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Concept explainers

Multistage Amplifier

The multistage amplifier is generally a voltage or power amplifier. The multistage amplifier has a number of single stage amplifier that are cascaded together. Since a single stage amplifier output is not useful, they are being replaced with multistage amplifiers or multistage transistor amplifiers. The multistage amplifier are used where the gain required is high or the input signal is very small such that only a single stage amplifier cannot amplify it.

Question

Vin
Two op-amp circuits are shown in Figure 2. One of them is an inverting
amplifier and the other is a Schmitt trigger. Assume the op-amps used
in both circuits are ideal op-amps. The output of the Schmitt trigger is
switching between -12 V and +12 V (i.e., Vmax = +12V).
a)
b)
R₁
Identify which is the inverting amplifier and which is the Schmitt
trigger.
Use the corresponding circuit diagram in Figure 2 to design an
inverting amplifier that has a gain of -20 with the output offset
voltage minimised. Determine the values of the resistors.
Select the corresponding circuit diagram in Figure 2 to design a
Schmitt trigger that has a lower trigger level of -1 V and an
upper trigger level of +2 V. Determine the values of resistors.
Sketch the transfer characteristics of this trigger.
+0.57 V
(a)
R₂
out
Figure 2
HI
60k12
R₂
(b)
Vout

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