https://electrical.codidact.com/categories/26/tags/3895.rssNew Posts Tagged 'filter' - Electrical EngineeringElectrical Engineering - Codidact2024-03-16T16:31:19Zhttps://electrical.codidact.com/posts/291080MAX485 transceivers breaking, Pi filter generating spikes?Lundinhttps://electrical.codidact.com/users/81762024-03-15T12:22:18Z2024-03-16T16:31:19Z<p><strong>Problem description & speculation about causes</strong><br>
I've having a problem with MAX485 transceivers breaking intermittently, passing our production tests but later failing. T...https://electrical.codidact.com/posts/286698Complex frequency of a poleMissMulanhttps://electrical.codidact.com/users/541072022-07-10T18:51:42Z2023-08-13T19:17:45Z<p>If we have the transfer function of a LC high pass filter:</p>
<p>$H(s) = \frac{sL}{sL+\frac{1}{sC}}$</p>
<p>If we want to find the pole of that filter in the end we get:</p>
<p>$s = \frac{j}...https://electrical.codidact.com/posts/285687How to calculate the RC filter of a TCXO for a RFIC reference?Lundinhttps://electrical.codidact.com/users/81762022-01-25T14:24:59Z2023-08-13T11:16:59Z<p>I have a 30MHz TCXO circuit (<a href="https://www.jauch.com/downloadfile/57ff72aa49d66_dc1704d8fa28afa2ca8a/jt53l.pdf">TCXO datasheet</a>) like this serving as local oscillator to a RFIC:</p>
<...https://electrical.codidact.com/posts/287262Ceramic filter vs ceramic resonatorDeadMousehttps://electrical.codidact.com/users/541412022-10-15T09:55:36Z2023-08-12T12:06:43Z<p>I have a design of a power line communication using the following IC.<br>
<a href="https://www.yamar.com/datasheet/DS-SIG60.pdf">https://www.yamar.com/datasheet/DS-SIG60.pdf</a></p>
<p>My desi...https://electrical.codidact.com/posts/279580The capacitance multiplier revisitedMichaël Bensimhounhttps://electrical.codidact.com/users/536122020-11-26T14:14:24Z2023-08-10T17:08:26Z<h1>Introduction</h1>
<p>A capacitance multiplier is an electronics technique that allows reducing the voltage ripple at some point in a circuit. It is often used in power supplies, after the rect...https://electrical.codidact.com/posts/276257Chokes, Beads and Inductors in Pi-filterszekehttps://electrical.codidact.com/users/530092020-06-23T19:36:22Z2023-08-09T21:24:09Z<p>I have seen pi-filters using chokes, ferrite-beads, and plain inductors as the L-element
What are the main differences between them? when use one or other?</p>
<!-- g: js, mdit -->https://electrical.codidact.com/posts/286721Band pass filter given cutoff frequency and bandwidthMissMulanhttps://electrical.codidact.com/users/541072022-07-14T23:15:22Z2023-08-08T20:04:58Z<p>I have decided to try design a band-pass filter with a cut-off frequency of 10kHz and bandwidth of 2 Hz.</p>
<p><img alt="Image alt text" src="https://electrical.codidact.com/uploads/EeXwmhPNCD...https://electrical.codidact.com/posts/286179When do I need to put anti-aliasing filter in front of SAR ADC?2kindhttps://electrical.codidact.com/users/534692022-04-01T13:56:04Z2023-07-31T22:24:39Z<p>Signal characteristics are:</p>
<ul>
<li>0 to 3.3V span</li>
<li>0 to 100Hz range( there will be noise superposed on top with unknown characteristics)</li>
<li>Output resistance Rout=4700 oh...https://electrical.codidact.com/posts/287203Low-pass filter after the output DAC in CD playersNick Alexeevhttps://electrical.codidact.com/users/529352022-10-09T22:32:21Z2023-07-27T18:00:06Z<p><em>[Disclaimer. This is not for an academic class. I'm self-studying.]</em></p>
<p>I’m reading an introductory book on DSP for audio and computer music [Steiglitz 1996, ISBN 0-8053-1684-1 p....https://electrical.codidact.com/posts/288751How to convert dv/dt of noise into frequency for filter capacitor selection?Elleanor Lopezhttps://electrical.codidact.com/users/566562023-06-28T09:59:26Z2023-06-28T12:26:33Z<p>Noise can be coupled between signal lines through parasitic capacitance formed between these signal lines, as</p>
<p>$i = C\frac{dv}{dt}$</p>
<p>where C is the capacitance between the signal l...https://electrical.codidact.com/posts/286688Effect of adding stages to a filterMissMulanhttps://electrical.codidact.com/users/541072022-07-06T18:44:34Z2022-10-17T18:50:06Z<p>Suppose we have a RC low pass filter of 1st order. If we add multiple stages every time we add a RC stage identical to our original does the slope of the curve in the bode plot db/Hz becomes w...https://electrical.codidact.com/posts/286730Design high -pass filter with 2 points of the bode plotMissMulanhttps://electrical.codidact.com/users/541072022-07-16T18:15:54Z2022-08-26T14:33:26Z<p>Im designing a high-pass filter which has a gain of -8dB at half of the roll-off frequency and I am stuck ,I dont know how to continue the design.</p>
<p>In the bode plot of that filter we have...https://electrical.codidact.com/posts/286679How to design a low-pass filter when certain conditions must be metMissMulanhttps://electrical.codidact.com/users/541072022-07-05T06:06:59Z2022-07-06T15:25:00Z<p>I am designing a low-pass filter with cut-off frequency = 100Hz and after the cutoff frequency from -3dB to -10dB the average decrease in db/Hz = -0.1 db/Hz.I know how to design a low-pass filt...https://electrical.codidact.com/posts/280594Why are two identical filters required for each signal, if the signals can be multiplexed into a single filter?Georgianhttps://electrical.codidact.com/users/536272021-01-28T18:22:44Z2021-01-30T13:48:30Z<p>In the block diagram of <a href="https://www.nxp.com/docs/en/application-note/AN4327.pdf">this pulse oximeter design guide</a> , in page 6, I see that the system utilizes two analog filters, one...https://electrical.codidact.com/posts/276216Moving average that uses less memory?Olin Lathrophttps://electrical.codidact.com/users/363962020-06-20T19:49:31Z2020-12-16T05:09:54Z<p>My control system gets a signal representing the plant output, but that
signal has a lot of noise on it. The control system goes nuts trying to
react to the noise. I need to filter out the noi...https://electrical.codidact.com/posts/278192High pass filter designcoquelicothttps://electrical.codidact.com/users/531102020-09-24T10:37:36Z2020-10-20T10:06:29Z<p>Despite there are many filter calculators available on the web, I still have difficulties to translate what I need into calculator design parameters.</p>
<p>For my application, I need ideally a ...https://electrical.codidact.com/posts/278445Filter Impedance Considerationjm567https://electrical.codidact.com/users/532992020-10-09T22:53:02Z2020-10-10T16:05:36Z<p>In a lot of textbooks, filters seem to be designed around a matching source and load impedance. However, If I have a filter stage between an antenna and an LNA, wouldn't I want the load impedanc...https://electrical.codidact.com/posts/276256Pi-Filter for EMCzekehttps://electrical.codidact.com/users/530092020-06-23T19:31:56Z2020-09-03T01:31:06Z<p>What would be the main considerations to use <em>Pi-filters</em> for EMC?</p>
https://electrical.codidact.com/posts/277845LC Filter and Capacitor Considerationsjm567https://electrical.codidact.com/users/532992020-09-01T00:15:34Z2020-09-02T18:44:25Z<p>I've been experimenting with LC filter circuits on the output of a SMPS I recently bought because it was too high for the circuit I'm making. After hooking up many different combinations, I foun...https://electrical.codidact.com/posts/276197Relationship between bode plot and pole zero diagramAndy akahttps://electrical.codidact.com/users/529872020-06-19T10:45:53Z2020-06-20T11:47:35Z<p>What is the relationship between the pole zero diagram and bode plot?</p>
<p>Case example: a 2nd order RLC low pass filter: -</p>
<p><img src="https://electrical.codidact.com/uploads/uXVdDX5xEQT...