biosensors lecture 7 - wheatstone bridge and op amp
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/13
There's no tags or description
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai |
|---|
No analytics yet
Send a link to your students to track their progress
14 Terms
Wheatstone bridge
an electrical circuit used to measure a very small change in resistance
4 resistors arranged in a diamond configuration ‘
bridge is balanced when Vout=0
use of a wheatstone bridge
small changes in R4 can be measured in two ways
after a small change in R4, measure Vout
using a variable R1, rebalance the bridge after a small change in R4. Use the newly adjusted R1 and calculate the new value of R4.
Op-Amps (operational amplifiers)
an electronic amplifier that can be used to perform mathematical operations on voltage signals
inversion, addition, subtraction, integration, differentiation, multiplication
Op Amps for sensors
used to condition AND/OR amplify the voltage signals generated from sensors.
Op-Amp properties
large input resistance
small output resistance