# 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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### Calculating maximum power of a unknown resistor

I need to calculate for what value of Rpot, will I get the biggest value of power. This is the electric scheme: The values are: 𝑅1=1kΩ, 𝑅2=250Ω, 𝑈=5V. I have idea how to do it, but I don't know ...
5k views

### 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 ...
741 views

### 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 ...
3k views

### Steady State RLC Circuit With Dependent Current source

I'm trying to figure out the reason why in the following circuit, at steady state, the current ix is zero. My best guess is that because there is a parallel branch which by KCL should equal 100ix and ...
1k views

### Calculating internal resistance of a voltage source? [closed]

I am trying to do some assignment for my homework. This is the assignment. The voltage at voltage source is calculated with measuring device that has has 2 resistance. The voltage measured is 10V. ...
135 views

### Trying to get v(t) for discharging RLC battery

I'm having trouble with the following problem. I want to find $V(t)$ (part (d)) and have been working for quite a long time on it. My first question is, if I do the following, are all the voltages ...
3k views

### How to use input/output termination resistors in filters?

NOTICE: I have added another question here that a solution for each one may help for solving the other one. Please look at Fig-1 below. It is a common usage of termination resistors. R1 , R2 work ...
655 views

### Calculating voltage in RLC circuit

Well I think the prof has made a mistake in one of his exercises, though asking here to be sure, The question is to calculate the supply voltage in the system below. simulate this circuit – ...
599 views

### Getting the total impedance (and voltage from it)

Well considering below schematic, how can the voltage over the capicator be calculated? I've tried first to solve it by mesh analysis (replacing the supplied voltage + resistor by thevenin's ...
150 views

### Shape current through coil

Suppose I have a simple RL-circuit with known resistance R and, inductance L with a voltage source where I can apply any input voltage (via an arbitrary waveform generator). What I want now is a ...
120 views

### LC-Circuits and Feedback into power supply

I am a medical researcher and I found an effect that I think I understand half way, but not completely and I hope someone more skilled in electrical engineering can clear this up for me. I am a novice ...
3k views

140 views

### R L CIRCUIT DESIGN [closed]

IN inductor current lag voltage by 90 if resistance and inductor is series .if laging current goes to resistor what happen .please explain about current from inductor to resistor
939 views

### Hybrid two port network models

Hybrid two port network modelling, as described by the texts, is a topic which enables one to reduce a complicated network into a simple two port network. I guess this is something which must have ...
26k views

### 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 ...
7k views

### 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 ...
2k views

### Thevenin equivalent circuit with current and voltage source

I have the circuit below and I have to calculate complex current i1using thevenin equivalent circuit method: I tried to follow the rules and open the terminal <...
1k views

### Change capacitance or resistance in RC circuit

When tuning an RC circuit you can choose either to tweak the resistance or the capacitance. I was wondering if there are any benefits for choosing one over the other depending on what you are trying ...
3k views

### 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 ...
596 views

### Capacitors and filtering

I noticed that in many audio op-amps, RC constant is designed so that the cutoff frequency is about 16 Hz. I think that's because the human ear responses to frequencies higher than 22 Hz. But I am a ...
7k views

### Finding Resonant Frequency in LC circuit using oscilloscope data

I designed a RLC circuit. I chose L and C such that resonant frequency become 2KHz. L=100mH, C=0.25*10^-6F and I took R to be 100 ohms. Then I generated Bode plot for range 100Hz to 10KHz. Ideally I ...
503 views

### Why does my transistor circuit produce a wave?

Could some one explain to me how my circuit works? I accidentally hooked this up while trying to work out an amplifier. I'm thinking there's something like RC resonance going on, but I'm not sure. ...
2k views

### Hall effect sensor output type - open collector vs RC

I am about to select a hall effect sensor. Two types are available: one has an open collector (OC) output, the other an RC output. The datasheet states that both are current sinking. But because I ...
1k views

### LC filter for Vref and Vadc

I'm reading an Atmel Data-sheet and it mentions using an LC filter for the Vref and Vadc pins, when simulating a simple small AC voltage with a 5V offset and using an LC filter with 10uH and 10uF the ...
12k views

### Circuit to remove noise from digital communication line

Carrying on further from my previous post and drilling down to specifics, I am trying to figure out the right way to implement "glitch remover", or "noise remover", using electronics (i.e. not in ...
8k views

### Calculate the value of an inductor using an RL or LC circuit

Given an inductor of an unknown (though magnitude-estimatable) value, and a resistor of precisely known resistance, how can one calculate the inductance of the inductor? Tools I have at my disposal: ...