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RB 1 kN Vcc Vo M2 15 V 10 V D3 50 Figure 4.164

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter30: Dc Motors

Section: Chapter Questions

Problem 6RQ: What is CEMF?

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Concept explainers

Operational Amplifier

An operational amplifier also called op amp is an integrated circuit or analog circuit that takes input as a differential voltage and produces output as a single-ended voltage. It is an IC that can amplify weak electric signals.An op amp has one output pin and two input pins. The basic role of an opamp is to amplify the voltage difference between the two input voltages. It is also used in filtering or to perform mathematical operations or in signal conditioning.

Question

The circuit is a current regulator utilizing an ideal op amp. (a) Find the current in the
Zener diode and the drain current in the NMOS
transistor if the Zener voltage is 6.8 V. (b) What
is the op amp output voltage if the MOSFET has
V_TN = 1.25 V and K_n = 75 mA/V²?

RB 1 kN
Vcc
Vo
M2
15 V
10 V
D3
50
Figure 4.164

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