ECE 312 Experiment # 8 Phase Shift Oscillator/ Astable Multivibrator
This experiment is taken from Hambleys Experiment #19. Hambleys sections 9.11 & 12.2
describe the principles involved.
1. Find the transfer function, Va()/ Vb(), of
Example: The Input
Consider an inverting amp constructed with an op-amp
exhibiting an input offset voltage of Vos:
Applying the concept o
ILLINOIS INSTITUTE OF TECHNOLOGY
Department of Electrical and Computer Engineering
ECE 312 Electronic Circuits
Total. Vcc Vac, flsv
f": 1. An npn transistor has its base current biased
' at 10 uA as shown.
The device paramet
An amplifier w/o compensation has a gain of 100dB and single poles at 100 kHz,
1 MHz, and 10 MHz. The Bode plot is on the back side of this page.
1. What gain w/fb will result in a phase margin of 45o? Show the closed-loop gain (inclu
ECE 312 Electronic Circuits
1. Analysis and design of the gain blocks in integrated-circuit amplifiers as well as
using laboratory equipment to measure their performance.
2. Acquire techniques of device biasing in integrated circuits usi
ECE 312 Experiment #1 Current Mirrors and Active Loads
We will be using 2N3904 (an NPN transistor) and 2N3906 (a PNP transistor) both in a TO-92 package. Data
sheets for these transistors will be needed.
One of the easiest methods to obtain a
ECE 312 Experiment #2 Design/Characterization of Emitter Coupled Amplifiers
The two emitter-coupled transistors used in this experiment need to be matched. As you found out in the first
experiment, it was difficult (if not impossible) to search thru our s
ECE 312 Experiment #4 Frequency Response I
This experiment will investigate the high frequency response of the CE, CC (emitter follower), and CB circuits.
The capacitance between collector and emitter, C, when multiplied by the Miller effect, pla
ECE 312 Experiment # 8 Phase Shift Oscillator
This experiment is taken from Hambleys Experiment #19. Hambleys sections 9.11 describe
the principles involved.
1. Find the transfer function, Va()/ Vb(), of the ladder network.
ECE 312 Lab #7 Feedback II
This circuit models an amplifier w/fb or
wo/fb . The open-loop gain is 60dB and
there are 3 poles. If C1 = C2 = 0, it is a
single pole amplifier. If C3 = 0 and C1 =
C2, it has a double pole. If C1 = C2 = C3,
it has a tri
ECE 312 Experiment Lab #6 Feedback
The 50 resistor is the internal resistance of the
function generator. Use 2N3409 transistors. Assume
that hFE = hfe = 200 and that VT = 26mV.
If a short circuit replaces the dotted line labeled fb, the
ECE 312 Experiment #5 Frequency Response II
Figure 1 is a demonstration circuit, i.e., it was designed to have a mid-frequency gain and low & high breakfrequencies that are easily calculated and measured.
Figure 2 is a CE amplifier taken from Ham
ECE 312 Experiment # 8 Wien-Bridge Oscillator w/ and w/o Push-Pull Output
Read: Hambley pp 562-566, 641-645
1. The circuit on the left is a Wien Bridge Oscillator.
Identify the A network and the network. Determine
A and in terms of R
ECE 312 Experiment #3 Differential Amplifier with Emitter Degeneration
In this experiment we will use the transistor array CA 3086. Refer to the spec sheet downloaded for the previous
experiment. Pin 13 is the emitter of Q5 and is also the substr
ECE 312 Experiment # 10 Active Filters
The circuits shown are both
low-pass filters. The switch
represents a jumper (when
you breadboard the circuits
in the lab). If the switch is
open, you can measure the
Bode plot and pulse
response of each circuit. If
This problem has 5 amplifiers, all with A=100060dB.
A1 has a single pole at 10k.
A2 has a double pole at 10k.
A3 has two poles, one at 10k and the second pole at 1k.
A4 has a triple pole at 10k.
A5 has three poles, a single pole at 10 and a double po