70009 Parallax Inc, 70009 Datasheet - Page 118
70009
Manufacturer Part Number
70009
Description
BOOK UNDERSTANDING SIGNALS
Manufacturer
Parallax Inc
Type
Signal Analysisr
Datasheet
1.70009.pdf
(137 pages)
Specifications of 70009
Style
Book
Title
Understanding Signals
Contents
Guide to Generate, View and Measure Wave Forms
Product
Microcontroller Accessories
Lead Free Status / RoHS Status
Not applicable / Not applicable
Other names
70009PAR
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You will repeat this exercise using different resistor values for Ri and Rf to create a
gain of 2 and a gain of 3. When you repeat this exercise for a gain of 2, where Ri = 1
kΩ and Rf = 1 kΩ, your signal may or may not be clipped. This will depend on your
supply voltage, which determines the dynamic range of the amplifier. Whenever the
op-amp tries to send a voltage that is beyond its dynamic range, the actual output will
stop at the limit of its dynamic range. If you are using a fresh 9 V battery, your signal
might not be clipped, but if it is close to worn out, your signal might be clipped.
Figure 8-12 shows what the signal with a gain of 2 might look like if it is clipped or
not clipped.
√
√
√
Repeat this exercise using a 1 kΩ resistor for Ri and a 1 kΩ resistor for Rf in
your circuit.
Set your Cursor Settings switches to Horizontal Bars and Floating .
Measure the amplitude of the new output signal, noting the ∆ V value. If your
signal is clipped, you may have to visually estimate the placement of the upper
cursor as shown in the bottom picture of Figure 8-12.
Figure 8-11:
Input and output
signals for a
non-inverting
amplifier with a
gain of 2