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.
89 questions with no upvoted or accepted answers
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Appoximation of a transient response of a more complex circuit
I have a "complicated" circuit that I want to approximate as a simple harmonic oscillator. More info below.
I have a parallel LRC circuit, with some extra input and output load resistors and coupling ...
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Square vs Round Air-core Inductors for RF filters: When would you use one vs. the other?
The Kyocera AS-series Square Core Inductors boast that "the unique square cross section of the air core inductor provides better performance, and offers manufacturing advantages over toroidal ...
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Why is mass mapped to inductance in the Mass–Spring–Damper ↔ RLC analogy?
In the Mass–Spring–Damper ↔ RLC Circuit analogies, mass is mapped with inductance.
F=mdv/dt, V=LdI/dt
From a cause–effect point of view, I find this confusing:
In mechanics, a force causes ...
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Find v(s) in the circuit below(voltage through the capacitor)
Capacitor initial conditions = 10v, inductor = 2A. Input is the current font.Find voltage through the capacitor
I think i got it but i have no clue whether its right or not, would like to know what i ...
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How would you design a power divider with 50-Ohm unbalanced input and 4x 100-Ohm balanced output impedances to send RF down a CAT6 cable?
A CAT6 cable has 4 balanced pairs, each at 100 Ohm. I'm wondering if I can make a 50-Ohm coax unbalanced input and split the power to 4x 100-Ohm balanced output (and then merge it back together the ...
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Nonlinear circuit and RLC
I'm trying to solve the following question from "Communication Circuits: Analysis and Design"
by Donald T. Hess:
For the circuit shown in Fig. \$1.P1\$, determine an expression for \$v_o(t)\...
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My DIY passive Ethernet hub not working
I learning networks, and I want to build passive Ethernet hub. I picked scheme with resistor bridge. It works with two devices, but non with three. Every resistor is 30.4 Ohms.
Why is scheme not ...
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How to derive an ODE for a general n-th order LTI circuit?
I have seen in multiple books the following fact:
Suppose we have an n-th order \$RLC\$ LTI circuit with and independent volatage source \$x(t)\$. Then a voltage \$y(t)\$ of some node in the circuit ...
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Online motor inductance measurement at different rotor angle
I wanted to measure the inductance of PMSM at different rotor angles. I'm familiar with the offline methods of measuring motor inductance but would like to measure a motor's inductance while it's ...
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Resources for impedance matching networks
I am working on my first hobby PCB design project that includes RF components. On one hand, I have a 2.5GHz WiFi signal and an 868Mhz LoRa signal.
I copied the matching networks from the reference ...
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Calculating the current through a time-varying RLC series resonant circuit
As shown in the circuit below, an admittance \$Y\$ consists of a series resonant circuit \$Y_m\$ and an additional capacitance \$C_0\$ in parallel.
\$Y\$ is given by
\$Y = j \omega C_0 + Y_m = j \...
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RE46C180 -- disabling chamber checks
There are two types of things one can hook up to the interconnect wiring of a multiple station smoke detector: smoke alarms (with their own detection chamber, control chip, and horn) and auxiliary ...
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What is the equation relating Vin and Vout on a 2-Port Network?
I was reviewing a paper, and I got stuck while trying to understand the analysis of the two-port network.
This is the circuit below with the equation below it
This is my attempt below, my knowledge of ...
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229
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Transient buildup of capacitively coupled transistor amplifier
I'm trying to understand the following section from "Communication Circuits: Analysis and Design" by Donald T. Hess:
Here \$W(t)\$ is defined by $$W(t) = e^{\frac{q(v_i(t) - v_{imax})}{kT}}$...
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Electric noise filtering seems not to have any effect over voltage input noise
I have designed two PCBs with slave SPI nodes at both. One of the two PCBs is connected to a Raspberry SPI port, it became the master node. This PCB also has a 74HC51 (suggested for i2c and spi lines ...
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