# Questions tagged [passive-networks]

Use this tag for circuits that only contain passive components, such as resistors, capacitors, and inductors. This includes RC, RL, LC, and RLC circuits.

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### Understanding USB Inrush Current Requirements

In relation to a previous question, I'm trying to understand the USB 2.0 requirements for inrush current. I understand the basic idea, but a few details are still unclear to me. The specification ...
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### How do you determine the effective resistance of a finite grid of resistors?

Disclaimer: I am a geophysicist with limited electrical engineering background. I am not sure if this problem is incredibly easy, incredibly complex, or completely nonsensical. My goal: Determine the ...
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### RC differentiator circuit explaination

This is the circuit of a basic RC differentiator, with the input/output voltage waveforms. First of all, I don't understand why there is decrease in the output voltage (discharging of charge from ...
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### The Intuition for RLC circuits

I'm reading through Hayt's Engineering Circuit Analysis 9e and it does a fairly good job of giving the intuition for "where" the energy is going in a damped RLC circuit, but I'm hoping that someone ...
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### RC circuit understandings

I am trying to understand the principles of a RC charging / discharging circuit however I'm at loss regarding certain aspects of its operation. I have a square wave generator giving 0v to 5V levels ...
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### What does the value of reactive power represent physically?

In my power engineering course, we were introduced to reactive power. I believe I understand what reactive power is in essence: there is energy transfer between the source and inductor/capacitor. This ...
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### Intuitive explanation for filters

Can anyone provide an intuitive explanation for the filtering action of RC or LC circuits? I know the mathematical treatment involving reactances but I was wondering if that could be explained ...
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### PIC 16F84A RC oscillator problems

I'm trying to use an RC oscillator on a PIC 16F84A-20 that I have on a breadboard. The code is supposed to (at this point) simply flip an output back and forth every so often. I don't need it to run ...
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### Equicalent circuit - RC // RC

I am doing a filter analysis of a simple network filter, requiring drawing some equivalent circuit to simplify the expression and analysis of the transfer function. The issue I've got is regarding a ...
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### What are state space equations?

I'm in a Linear Circuits semester II class, and we're going over 2 port networks. State space equations show up on the practice exams but not the lecture slides or book. I was wondering if they were ...
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### Oscillator for High Voltage Transformer: RLC or Blocking Oscillator

What type of oscillator is being used in the schematic? How is that particular oscillator working in this circuit? I'm less than confident with oscillator theory, and I can't tell if this is RLC or a ...
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### Series RLC circuit problem

I have attached my attempt and the solution provided by my instructor. I am confused on 2 things what it means by "the circuit is in quiescent state" ? why is he getting sqrt(8) in the current ...
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### RLC - Understanding Phase Shifts

I'm having trouble understanding intuitively phase shift for RLC circuits. For example, I have seen the following: In the low-frequency regime, which element is the dominating element (highest gain)...
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### Is the output of this LC circuit a DC current?

On the left of the circuit shown below is a 120V AC current. I know that the diode (D1) rectifies the signal so that only the positive half of the AC signal goes through. I have seen circuits with a ...