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ENE
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Hello,
What is this circuit working for?
What is this circuit working for?
ENE said:I have used op amp and comprator like 741 and L339.
I don't understand the circuit Q npn.
let the transistor be off so open circuit for feed back.In operation, either the transistor will be functioning as a transistor, or it won't be. If it is not functioning as a transistor then it is "off".
Now using the result that Vout = -15V does this confirm your premise that Q is "off"?ENE said:let the transistor be off so open circuit for feed back.
so, +ve pin to 0V
and -Ve pin to 5V
that mean it should be -15V?
We need a yes or no answer to the question: Is it possible in this circuit for Vout = -15V to be keeping the transistor off?ENE said:The BJT is npn it will get more -ve with respect to base for turing on it want 0.7V
This is not correct.lychette said:If a load is connected between Vout and -15V then the circuit acts as a constant current (5mA) source for resistive loads of up to 3kΩ.
Yes, but not a good one.Averagesupernova said:For you naysayers it is most likely a log amplifier.
A circuit is a closed loop of conductive material that allows electric current to flow through it. It is typically made up of various components such as resistors, capacitors, and transistors, connected by wires or traces.
Circuits are used to control the flow of electricity and perform specific functions such as amplifying signals, filtering out noise, and powering electronic devices. They are essential for the operation of most electronic devices, from simple household appliances to complex computer systems.
A circuit works by providing a path for electricity to flow from a power source (such as a battery) to the components that require electricity to function. The components in the circuit work together to modify the flow of electricity and perform specific tasks.
There are several types of circuits, including series circuits, parallel circuits, and combination circuits. Series circuits have all components connected in a single loop, while parallel circuits have multiple branches for the current to flow through. Combination circuits have a mix of series and parallel components.
Understanding circuits is crucial for developing and designing new electronic devices, troubleshooting and repairing existing ones, and ensuring the safe and efficient use of electricity. It also allows us to use technology in our daily lives and continue advancing scientific and technological progress.