Questions tagged [passive-filter]
For questions about passive filters. Consider also using the "filter" tag, and use the "active-filter" tag if an active filter is part of the question.
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Where should I take the measurement from to find the correct attenuation level of a resistive pi attenuator?
I am currently designing a resistive attenuator for an RF project I'm working on. I wanted to have several resistance combinations to obtain various attenuation levels (1-8 dBs). When I calculate the ...
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Butterworth Filter for SMPS
If the performance of a Butterworth filter is dependent on the load impedance how do high voltage high power 1kW+ SMPSs manage to achieve smooth output ~100mV peak to peak across wide ranges of load ...
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Bessel Filter to separate AC and DC at Supply Level
I have a Supply Source composed of 150 VAC @ 400 Hz + 48 VDC. It is used to supply a big relay (~ 4 H, 1820 Ohm).
I need to extract the 48 VDC, filtering out the 150 VAC. I designed the following 5th ...
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Help needed with RC Phase Shift Oscillator Analysis
I simulated the following circuit from page 439 of “The Art of Electronics, fig.7.23”. It works fine and outputs \$\approx 1\ \rm{kHz}\$ as expected. My question is around the theory, I expected the 3 ...
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RC filter cutoff and impedance
I wanted to create RC lowpass filter with cutoff frequency 15 kHz and output impedance 50 ohm. What should be R and C values? I'm a little confused how to interpret 50 ohm output impedance to ...
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What happens if a low-pass filter and a high-pass filter are interchanged in a band-pass filter?
what happens in this circuit if I interchange the highpass filter and lowpass filter how does it affects the gain and phase shift
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Why is my band pass filter giving a gain of 0.5 in the -3 dB gain region?
I designed a band pass circuit but it gives me a gain of 0.5 in the band region. Shouldn't it be 0.707?
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How do I calculate how to change the cut off frequencies of this bandpass filter? [closed]
I am trying to find the transfer function of this filter to change the cut off frequencies later.
When I do the calculations the traditional way the equation is very long and messy.
Maybe there is ...
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Is this the correct way to make a bandpass filter?
I'm trying to make a bandpass filter for a low voltage noisy electrical signal coming from a K-Type thermocouple
To identify the frequencies I would need to filter out, I make a spectrum diagram using ...
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Passive filter design from transfer function
I would like to implement a passive RIAA filter circuit. This is the bode plot of a RIAA equalizer.
The transfer function of this:
H(jw) = (jwT1 + 1)/[(jwT2 + 1)(jwT3 + 1)] where time constants are ...
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How to determine band-pass frequency and bandwidth in photodiode TIA circuit
I'm trying to figure out how a photodiode amplifier circuit works. It is used in my university plasma physics lab to measure plasma density through laser interferometry.
This circuit was designed 20 ...
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How to determine the transfer function of this pi filter?
I have this pi filter, I wonder how do i determine the dynamic model and the transfer function of this filter?
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Derivation for capacitance and inductance formulas for Linkwitz Riley and Butterworth crossovers
I'm only a high school student but was looking into some aspects of crossover design. In particular, I was learning about this crossover:
I understand the derivation of the crossover/cutoff frequency ...
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Power over Coax (PoC) filter design calculations
I need to design a PoC filter for one of my project. I am referring this document for the same. Below is the PoC filter given in page in 13. I am using only TI parts. This document is from TI.
This ...
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Questions about eliminating oscillation and noise in a load cell system
I'd like to ask you for your expertise on a challenge I'm facing as part of an electronics project.
A crucial part of this project is the integration of a force sensor, whose variation in resistance (...
