Circuit Simulator - Log Amplifier
Why should I learn to use the circuit simulator to design Log Amplifier circuits?
Learn how to use circuit simulator software to design your own Log Amplifier circuits.
Where can I get a Log Amplifier circuit diagram with an explanation?
IndiaBIX provides numerous Log Amplifier circuit diagrams with detailed explanations and working principles.
How do I design a Log Amplifier circuit with this circuit simulator?
You can easily design Log Amplifier circuit diagrams by practising with the given circuit simulator. With this online circuit simulator, you can design and simulate your own electronic circuits.
Log Amplifier
Circuit Description:
This circuit outputs the negative log of the input. The first op-amp attempts to keep its – input at ground, which means the current across the 1k resistor must be proportional to the input voltage. This current goes across a transistor, so the op-amp must keep its output voltage at a level which satisfies the Ebers-Moll equations, which means that eVout is proportional to the input current. This means that output voltage must be proportional to the log of the input current (and thus the input voltage).
The combination of the second transistor and the current source adjusts the output voltage upward by a fixed amount, and the second op-amp amplifies it 16x.
The combination of the second transistor and the current source adjusts the output voltage upward by a fixed amount, and the second op-amp amplifies it 16x.
Discussion:
1 comments Page 1 of 1.
Vinay said:
1 decade ago
Hi,
Please mention the op-amp used here.
Thank you.
Please mention the op-amp used here.
Thank you.
(2)
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