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# ba4558 as low pass filter

• ## Novice question about low-pass filterMarch 15

I am trying to construct a simple low-pass filter for the following scenario: A high-voltage DC signal with lots of noise. I looked at Wikipedia's article on a simple passive low-pass filter. I understand how the capacitor "looks like a short" t

• ## What's the sharpest frequency response for a non-causal low-pass filter whose step response doesn't overshoot?May 8

Butterworth, Bessel, Chebychev, and sinc low-pass filters are used in various cases where there are different tradeoffs between having a uniformly-decreasing frequency response, a uniform phase response, a steep cutoff, or "brick-wall" response.

• ## LF Low-pass filter for RFJuly 15

I need to measure the RMS power in a DC-10KHz range of a signal that contains RF frequencies (up to 1GHz). My idea was to design a low-pass filter with 10KHz cut-off frequency, and then measure the RMS power by sampling with a MCU or using some trueR

• ## Designing a low-pass filterOctober 4

I want to design a low pass filter with common-mode choke that has a cutoff frequency of 100 Hz. This is going to be used in a bus 24V DC power system that will deliver 10A to the load. I want to use it to clear EMI, RF interference and noises. Since

• ## 100W Low Pass FilterFebruary 17

Currently I have a 60W amplifier for the 400-500MHZ band with a 50Ω impedance. In order to prevent jamming other frequencies I will need a low pass filter to block any frequencies above 500MHZ. I just made a full Internet search and haven't found any

• ## how determine the RC time constant in PWM digital to analog low-pass filter?July 1

I 'm looking for the best RC time constant and its reason in a PWM to convert digital signal to analog based on duty-cycle and frequency and other parameters. PWM frequency is 10 kHz. --------------Solutions------------- The best RC is infinite, then

• ## Low Pass Filter Design July 5

Possible Duplicate: Injecting a communication signal over DC power supply lines I have a pretty simple circuit, but I need to send an output PWM signal through the same place I'm getting my voltage. The voltage is DC, so I figure since my PWM is an A

• ## Recommended placement and routing of an RC Low pass filterJuly 16

What are the recommended placement and routing techniques for the following RC low pass filter circuit: I made an initial placement and routing that's shown below: Actually it's randomly placed and routed because I don't have any recommendations. Tha

• ## Understanding the AVCC pin wiring on ArduinoLeonardo (low-pass filter?)July 20

The Arduino Leonardo has an interesting difference with previous boards: the AVCC pin of the ATMEGA32U4 is connected to +5V through a MH2029-300Y ferrite beads and to GND through a 1uF capacitor. In ArduinoUno and ArduinoMega2560, this pin was simply

• ## Audio to Low-Pass Filter to Comparator to LED = Fading LED based on the Frequency?November 14

If I were to pass an audio signal through a Low-Pass filter with a cutoff frequency of 200 Hz (bass), and then send that signal to a comparator, then use this signal to drive an LED, would the LED be able to change its brightness based on the frequen

• ## Canon 1Ds Mk II's scratched Low Pass filter. Now what?January 25

Besides our workhorses (Canon 5D3 and 60D), we have an old camera - Canon 1Ds Mk II which has its OLPF scratched. That is, the camera works (ok, more or less because the signs of time are present on it - however is usable) without any problem for ape

• ## How to clean an actual CMOS sensor? (Not the IR low pass filter)February 5

All of the "sensor cleaning" instructions I've found are actually for cleaning the IR low pass filter in front of it. Unfortunately, I've got a tiny bit of tape residue on the actual CMOS sensor of the camera. (Not to worry, this is a \$40 camera

• ## Q value of a passive single stage RC low pass filterFebruary 12

I'm a student trying to understand filters. I would like to know what the Q value of a series RC low pass filter is. As far as I'm aware, one can't design for it, but I'd still like to know what it is! Surely it must have a Q value! Also, is it possi

• ## When to use buffer/ low-pass filter on ADC input?February 17

Sorry if this is a bit of a sophomoric question, but when should you buffer an ADC input, specifically from a potentiometer. I've seen circuits add a low-pass to the wiper/ ADC input.. is this only necessary if you have switching noise on the referen

• ## Is a low load resistor a big problem in low pass filter and amplifier circuitMarch 2

I am going to use AVR's PWM output signal to pass through a low pass filter (maybe plus an amplifier). I found the speaker has a quite low resistance (8 ohms). I tried to simulate my schematic on Orcad, obtaining very a low voltage signal on speaker

• ## low pass filter design for accelerometerMarch 13

I find the following code for a simple implementation of a low pass filter. #define alpha 0.1 accelX = (acceleration.x * alpha) + (accelX * (1.0 - alpha)); I have been experimenting with the value for alpha. But I want to know how exactly we can find

• ## estimate SNR improvement due to filter bandwidth of low pass filterMay 22

I facing a problem in GSM simulation. I am having a perfect GMSK modulated (I can assume that GMSK filter is 200kHz or 270 kHz band limited) signal in Tx path adding AWGN of 6dB SNR (Noise 6dB below Signal). I am passing this through a baseband filte

• ## Low Pass Filter that can quickly turn on or off?June 19

I may be pushing physics here so please tell me if I am. I have a signal I'm trying to anti-alias at 50Hz (sampling at 100Hz). The problem is my input signal is essentially an Amplitude Modified square wave that matches the sampling frequency with a

• ## Using sox low pass filter with jackAugust 10

How do I run sox with jack so that sox takes the input from jack, does something (in my case, a low pass filter) and outputs the processed stream to jack. sox foo.wav bar.wav lowp 1000.0 Will take an input wav and output to another wav, however I nee

• ## LC Low Pass FIlter in Buck ConverterSeptember 7

Hi In this circuit below: What role is the LC Low Pass filter playing? The switch is switching ON-OFF alternatively, at a frequency which determines the Duty cycle, and we get an average output at the point before L. Now why do we need to hook up an