12:45 14:00 PM February 24, 2009
Electronics: Midterm #1
Name & ID:
Question 1. 30 points.
Plot the magnitude and phase for the following transfer functions:
a) HS = - (IOpoints)
( ) (s +10)(s +100)
(s + 10)(s+ 1000)
(s +100)(s + 10000)
The calculated input impedance was 16K and the small signal gain was 4/10. When the capacitor
was omitted the gain of the amplifier decreased by half. The sweeping frequencies were 650
mHz @-3dB for the low frequency; for the high frequency 475khz.
The lower -3dB cutoff frequency is approximately 15.922 Hz
The upper -3dB cutoff frequency is approximately 5.1051 MHz
100 mV input distortion
100mV output distortion
150 mV input dis
Department of Electrical & Computer Engineering
Texas A&M University
Dr. Jose Silva-Martinez (firstname.lastname@example.org)
Rida Assaad (email@example.com)
Raghavendra Kulkarni (firstname.lastname@example.org)
.-."m"r_-Inm.J nan .c.
124 CHAPTER 2 OPERATIONAL AMPLIFIERS
2.000 V and that at the negative input to be 3.000 V. For the
amplier to be ideal, what would you expect the voltage a
ECEN 325 HOMEWORK 6
(Due date: Tuesday April 26, 2016, 8:00AM)
1. In the following circuit, Vi (t) = 102 sin(2103 t).
(a) Find the DC drain currents (ID ) and verify operating regions for all transistors.
(b) Find the small-signal transfer function Vo /Vi
ECEN 325 HOMEWORK 1
(Due date: Tuesday February 2, 2016, 8:00AM)
For the following circuits:
Find the complete solution (steady-state and step response) for Vo (t) for t > 0.
Sketch the magnitude Bode plot of the steady-state AC transfer function H(s) =
ECEN 325 HOMEWORK 5
(Due date: Tuesday March 29, 2016, 8:00AM)
1. For the following circuits, find the small-signal transfer function Vo /Vi and sketch its magnitude Bode plot. Assume
= 100 and VT = 25mV (you can use your results from homework #4 for the
ECEN 325 HOMEWORK 2
(Due date: Tuesday February 9, 2016, 8:00AM)
For the following circuits, assume that the opamps are ideal and they are used in negative-feedback configuration.
Find the complete solution (steady-state and step response) for Vo (t) for
Provide a brief introduction to basic capabilities of the NI Elvis prototype environment.
The purpose of this lab is to understand how to utilize NI Elvis prototype equipment.
Major functions of the NI Elvis instrument that we have dealt this ti
Introduction to NI Elvis Environment.
TA : Mohammad Mazen Al-Khaldi
1. For the circuit shown in Fig. 2A, derive the transfer function for vo/vin in terms of R and
C, and find the expressions for the magnitude and phase respon
Network Analysis and Bode plots
TA : Mohammad Mazen Al-Khaldi
1. For the circuit shown in Fig. 2, derive the transfer function for vo/vin in terms of R and
C, and find the expressions for the magnitude and phase responses
ECEN 325 HOMEWORK 3
(Due date: Tuesday February 16, 2016, 8:00AM)
1. In the following circuit, the opamp is non-ideal with the open-loop gain A(s) =
(a) Find the steady-state AC transfer function H(s) = Vo /Vi .
(b) Sketch the magnitude B
ECEN 325 HOMEWORK 4
(Due date: Thursday March 10, 2016, 8:00AM)
1. For the following circuits, find the DC collector currents (IC ) and verify operating regions of all transistors. Assume
= 100. Simulate the circuits using 2N3904 and 2N3906 transistors a
ECEN 325 HOMEWORK 1 SOLUTION
R = 10k
L = 500mH
C = 100nF
VDC = 4V
Vs (t) = 2 sin(21000t + /3)
IL (0) = 4mA
VC (0) = 3V
I AC sources 0
I L Short
I C Open
Vo,ssdc = 4
I DC source