Questions tagged [low-pass]
A low-pass filter lets lower frequencies through and blocks or reduces higher frequencies.
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Second order low pass filter cut off frequency calculation
I found this circuit which filters an incoming pwm pulse train from a Delta-Sigma ADC to an analog value.
The PWM pulse has an amplitude from 0 to 5 V and duty cycle varies from 10% to 88%. And the ...
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Switching voltage divider and low pass filter combined
I have an input signal which I want to switch from 12V-5V and a low pass filter directly after that, the issue is, if there wasn't a switch I can calculate the cut-off frequency easily.
In my case, ...
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How to calculate a differential + common mode LPF circuit?
I'm trying to validate my understanding of a differential + common mode LPF circuit using the AK4499EX datasheet (019001308-E-00 2022/07 version, p. 47). It presents the following circuit:
and its ...
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Non-ideal active low pass filter for LV25P output
Hello everyone I need some help understanding the active low-pass filter below.
I was told to use this circuit to filter the measurements of the output voltage of an inverter, but there is no ...
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Equalizer circuit using low pass filter
I'm working on my circuit theory project. My goal is to make a simple 3-channel equalizer using 1 low pass filter and 2 band pass filter.
Here is my circuit. Problem is, the 8kHz passive low pass ...
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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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How to design a 2nd order low pass filter [closed]
I have a question about second order low pass filters.
I have a DC/DC power supply at 3.3 V and I would like to filter this signal to address any disturbance from 50 Hz (ideally only keep the DC ...
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Why does my integrator slowly saturate to negative rail in the following configuration?
So I have the following basic integrator circuit:
The input signal is a 100mVp-p square wave of 50k frequency. In this case I get a stable triangle wave output.
However, when I make the amplitude ...
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How can I select a common mode choke for DC/DC power conversion stages
I want to attenuate 15 MHz noise signal using a common mode choke at 5 V power lines stage of a circuit that generate digital signals with less than 100Mhz.
When you use a common mode choke for a ...
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3-pole LC filter design
When designing a 3-pole LC filter with a ferrite bead as inductor L, using capacitor values intended for a LC filter with an inductor (not a ferrite) produces a large 'dip' or 'bounce' in its ...
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Is it possible to achieve a square root analog filter?
I am attempting to create a (3/2)th-order active low-pass filter circuit, with a zero[es] at ω=10000 and pole[s] at ω=100. The only way I can think to do this is to simply cascade three simple first-...
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Capacitor "blocking DC" in a low pass filter [duplicate]
If we imagine a basic lowpass filter, the AC components from the non perfect DC from VIN passes the capacitor and down to ground, meanwhile "pure" DC flows to VIN.
If we take a basic closed ...
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How can I calculate filter parameters between RF switch and antenna?
In the schematics en.MB1389-WL55JC-highband-E02_Schematic,
there's a Pi filter following the RF switch before it links to the SMA connector for the antenna.
Upon calculation, I found that the cutoff ...
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Raspberry Pi DAQHAT: Overvoltage issue
I am working on development for a piece of HV test equipment, where I need to monitor the voltage output for a circuit that is actively arcing.
I am measuring the voltage off of a Raspberry Pi DAQHAT (...
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