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close this bookAmplifier Teaching Aid (GTZ, DED; 86 pages)
View the documentPreface
View the documentIntroduction
Open this folder and view contentsLesson 1 - Semiconductor Review
Open this folder and view contentsLesson 2 - Bipolar Transistor
Open this folder and view contentsBipolar Transistor II
View the documentFirst Evaluation
Open this folder and view contentsLesson 4 - Transistor Fundamentals
Open this folder and view contentsLesson 5 - Transistor Biasing
Open this folder and view contentsLesson 6 - Transistor Biasing II
View the documentSecond Evaluation
close this folderLesson 7 - Small Signal Amplifier
close this folderLesson Plan
View the documentSmall signal amplifier
View the documentCoupling capacitor
View the documentBypass capacitor
View the documentAmplifier analyzing method
View the documentWorksheet No. 7
View the documentExperiment No. 4
Open this folder and view contentsLesson 8 - Small Signal Amplifier II
Open this folder and view contentsLesson 9 - Small Signal Amplifier III
Open this folder and view contentsLesson 10 - Large Signal Amplifier
View the documentThird Evaluation
 

Small signal amplifier

AC Signals

After the transistor has been biased with the Q-point near the middle of the load line, we can put a small ac-voltage on the base (Vin). That procedures a large ac voltage at the collector (Vout). This increase is called amplification. For two reasons we have to use capacitors. First, to couple or transmit ac signals (coupling). Second, to short ac signals to ground (bypass).

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