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Q&A

Posts tagged circuit-analysis

Anything about circuit analysis, that is the set of techniques that can be used to infer the operation of a circuit from its schematic, and their application to specific circuits.

Do not use this tag for reverse engineering questions, which have a different tag. Those usually involve, among other things, reconstructing a schematic from a physical circuit. This tag should be used when you already have a schematic to analyze.

Do not use this tag for circuit design questions either. For those use the circuit-design tag.

This tag doesn't have a detailed wiki yet.

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Q&A Deriving resistor values for a taper pad attenuator

A taper pad is a resistive attenuator that maintains impedances on both ports and provides a specific amount of gain-loss ($A_{12}$): - I have derived formulas for each resistor (that I know to ...

3 answers  ·  posted 1y ago by Andy aka‭  ·  last activity 8mo ago by Lorenzo Donati‭

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Q&A Electromagnetic induction

If I connect a battery to an LC tank and then to an antenna and then on the other side at a distance x, I connect an antenna to another LC tank and this to a diode and this to an LED, Do a I have a...

1 answer  ·  posted 2y ago by Voyager ll universe probe‭  ·  edited 8mo ago by Lorenzo Donati‭

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Q&A How Relay inrush current limiter works?

In this circuit below the relay circuit part is acting as an inrush current limiter, but I can't understand how it works since the current is flowing in both conditions where the relay is open or c...

1 answer  ·  posted 1y ago by deleted user  ·  edited 8mo ago by Lorenzo Donati‭

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Q&A Thévenins Theorem for Transistor Circuit

I am calculating the base current of transistor Q1. To simplify the circuit equations, I applied the Thévenin's theorem twice and converted V1, R1 and R2 into Vth and Rth, as shown in the image. ...

2 answers  ·  posted 2y ago by kadamrohan16‭  ·  edited 8mo ago by Lorenzo Donati‭

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Q&A PNP Darlington pair as a current limiter

I am trying to analyse what is controlling the load current in the below Darlington configuration. Is it the base current of transistor Q3 which is controlling current through R14 / emitter curr...

1 answer  ·  posted 2y ago by kadamrohan16‭  ·  edited 8mo ago by Lorenzo Donati‭

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Q&A Floating circuitry and diodes

In both cases, is the "X" point floating when there is no 12V applied ?

1 answer  ·  posted 10mo ago by kellogs‭  ·  edited 8mo ago by Lorenzo Donati‭