Questions tagged [active-components]
Components which provide a gain in the circuit where they are applied. Typical examples are transistors and op-amps.
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Can I make active devices share voltage equally using ad hoc shunt resistors?
I have 3 active devices in series, SCRs in this case but I'm guessing that's not important. Each is rated for 2.4 kV. The total voltage I will actually apply is 6.6 kV.
Leakage current is guaranteed ...
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Active load and current source purpose on NE5532
I'm trying to do some reverse engineering on the NE5532 schematic, but I can't understand how is designed the current source for the first stage. What I want to analyze now is in yellow on the picture....
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Active load role on this circuit and possible uses
simulate this circuit – Schematic created using CircuitLab
I came with this circuit to know how an active load can improve it, I still can't finish to understand the role of active loads. The ...
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Capacitors and batteries as active/passive components
I'm trying to better understand the concept of active and passive components, mainly with respect to capacitors and batteries.
I found that - according to Wikipedia - there are two definitions of ...
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Mistake in using KVL and KCL in ideal opamp-circuit
I have the following circuit:
simulate this circuit – Schematic created using CircuitLab
And I used KCL and KVL to write the following sets of equations:
$$
\begin{cases}
\text{I}_0=\text{I}_1+\...
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Is a transistor truly an amplifier?
My understanding of transistor is that in it a tiny current controls a huge current. I get that concept. If that is the case, it is not amplifying anything in my opinion. Sure it does dictate when ...
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Is the Gate-Controlled Diode an instance of a trancitor?
I'm not sure it entirely counts. It certainly isn't useful in the way that the current-controlled voltage source is useful as the original transcitor paper describes, but more importantly, I am unsure ...
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PLCC4 footprint how to connect LED
I am confused as to how I should be connecting this design since this LED LTW-E670DS since it has 4 pins.
How do I connect it?
Pin 2 is Anode and 1 Cathode but 3 and 4?
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Why can you measure input and output impedance of a amplifier circuit with a resistance/potentiometer?
While running simulations for a circuit I measured the input and output impedance by simply adding a potentiometer, turn it up until the voltage peak to peak signal going out reached half and then ...
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Why does moving this ammeter change the polarity of the applied voltage?
Note: I'm not an electrical engineer, I'm a materials engineer. So maybe this question has an obvious answer, but I couldn't find one with a Google search. I also have no idea if I tagged this ...
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Darlington array: How to output desired voltage at uln2803a driver colectors?
Someone suggested this driver array to get the current I need:
datasheet
I also need a 12V signal and about a current of 100mA in order to control a relay coil. My 12V signal would come from a logic ...
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Why isn't this active rectifier circuit working?
I built the following active rectifier schematic on a breadboard, and inputted a 15 KHz 1V peak to peak sine wave from my signal generator.
The output looked like a sine wave and I have no idea why. ...
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Is MOSFET active device?
The V-I characteristics of MOSFET lies in the first and third quadrant. Therefore it should be passive device acc to me. But I have read that it is an active device. Can somebody tell what is wrong ...
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Simplest latching circuit with press-ON hold-OFF button that can cut power when Raspberry Pi halts
So I'm making a battery-powered Raspberry Pi project, and it would be ideal if it could cut off power to the Raspberry Pi after the Raspberry Pi shuts down. It would also be ideal if the power for ...
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Why are active loads used for transistor amplifiers?
I get it that voltage drop across active loads are less compared to passive loads and at the same time they offer high small signal impedance thereby increasing gain.
I cannot understand why DC ...
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