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Detailed Lecture Slides covering Op-Amps. Illustrates various types of Op-Amps. Has examples and worked out solutions
Typology: Slides
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LMP2012WGLQMLV dual-precision op amp from National Semiconductor (Santa Clara, CA) is ideal for satellite applications such as attitude and orbital controls, sun and inertial sensors, gyroscopes, pressure sensors, static earth sensing, bolometers and earth observation systems
What is an operational amplifier
(op-amp)?
Are we ready to understand how
this works?
No โ but we can create a simple and successful model that enables us to create uses for the above circuit
All Op-Amps have the same input and output connections
out
Op-amps combine the signal input voltage signals to determine the output signal voltage
Non- Inverting Input
Inverting Input
+Power Terminal
Vs+
Signal output
Vs-
+Power Terminal
Single Rail and Dual-Rail Power
Connection variations for Op-Amps
All signals are referenced to ground
A is the gain. The gain is a very large number
Difference between inputs must remain small or
the output saturates
If A=100,
Vout = A ( V (^) + โ V โ )
Rule 1: For output to not saturate: V+ โV-
1
0
To Solve for Relationship between
input voltages and output voltage
apply KCL to the inputs and keep in
mind:
Rule 1: For output to not saturate: V+ โV-
Rule 2: i + โ0 and i - โ
As V (^) +=0 therefore V (^) - =0 also
in
f
in
out
f
out in
in A
R
R
V
V Gain
R
V R
V i
โด = = โ
โ
โ
0 0
How Negative feedback works to fix the output to
what it should be
-.
