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Material Detail

An Op-amp Amplifier with a Current Input

An Op-amp Amplifier with a Current Input

Animation of an op-amp amplifier with a current input. This is a "transimpedance amplifier"-- an amplifier with a current input and a voltage output, constructed using an op-amp. Since the input current to the op-amp is zero, the current in the feedback resistor has to be equal to the input current. The op-amp provides the output voltage necessary to equalize these currents with the inverting input voltage held equal to the non-inverting input voltage (which is zero since it's tied to ground). This type of amplifier is often used in optoelectronics, because photodetectors are typically operated so as to produce a current output that then must be amplified.
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More about this material

Material Type:
Animation
Date Added to MERLOT:
July 18, 2016
Date Modified in MERLOT:
July 18, 2016
Author:
Submitter:
Barbra Bied Sperling
Hispanic Serving Institution
Primary Audience:
Grade School, Middle School, High School, College General Ed, College Lower Division, College Upper Division, Graduate School, Professional
Technical Format:
Website
Mobile Compatibility:
Not specified at this time
Language:
English
Cost Involved:
No
Source Code Available:
No
Creative Commons:
No

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