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Q&A Low-pass filter after the output DAC in CD players

[Disclaimer. This is not for an academic class. I'm self-studying.] I’m reading an introductory book on DSP for audio and computer music [Steiglitz 1996, ISBN 0-8053-1684-1 p. 287]. One of the ...

3 answers  ·  posted 2mo ago by Nick Alexeev‭  ·  last activity 1mo ago by Olin Lathrop‭

Question filter audio dac
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Q&A Effect of adding stages to a filter

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 wild...

2 answers  ·  posted 5mo ago by MissMulan‭  ·  last activity 2mo ago by a concerned citizen‭

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Q&A Ceramic filter vs ceramic resonator

I have a design of a power line communication using the following IC. https://www.yamar.com/datasheet/DS-SIG60.pdf My design is the same as the example circuit in the datasheet of the chip. Th...

2 answers  ·  posted 2mo ago by DeadMouse‭  ·  last activity 2mo ago by TonyStewart‭

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Q&A Design high -pass filter with 2 points of the bode plot

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. In the bode plot of that filter we have 2 points:...

3 answers  ·  posted 5mo ago by MissMulan‭  ·  last activity 3mo ago by LvW‭

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Q&A Band pass filter given cutoff frequency and bandwidth

I have decided to try design a band-pass filter with a cut-off frequency of 10kHz and bandwidth of 2 Hz. $$ \frac{1}{\sqrt{LC}} = 10001 \rightarrow LC = 1/100020001 sec^{2}$$ $$ \frac{R}{L} = 2...

2 answers  ·  posted 5mo ago by MissMulan‭  ·  edited 5mo ago by MissMulan‭

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Q&A Complex frequency of a pole

If we have the transfer function of a LC high pass filter: $H(s) = \frac{sL}{sL+\frac{1}{sC}}$ If we want to find the pole of that filter in the end we get: $s = \frac{j}{\sqrt{LC}}$ and for a ...

3 answers  ·  posted 5mo ago by MissMulan‭  ·  last activity 5mo ago by Andy aka‭

Question filter pole resonance
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Q&A Why are two identical filters required for each signal, if the signals can be multiplexed into a single filter?

In the block diagram of this pulse oximeter design guide , in page 6, I see that the system utilizes two analog filters, one for filtering the PPG signal generated while the RED light/wavelength is...

1 answer  ·  posted 2y ago by Georgian‭  ·  edited 2y ago by Georgian‭

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Q&A High pass filter design

Despite there are many filter calculators available on the web, I still have difficulties to translate what I need into calculator design parameters. For my application, I need ideally a high pass ...

3 answers  ·  posted 2y ago by coquelicot‭  ·  last activity 2y ago by a concerned citizen‭

Question filter
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Q&A Filter Impedance Consideration

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 impedance(i...

2 answers  ·  posted 2y ago by jm567‭  ·  last activity 2y ago by Olin Lathrop‭