Questions tagged [biquad]

Biquad is referred to either analog or digital second order filters

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biquad decomposition from given magnitude response

I have a adaptive FIR filter of length 84 with magnitude response , which is close to low pass. (Please see the attached figure). I need to design filter that has a magnitude response opposite of the ...
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Second-order sections from complex coefficients

I have an impulse response ir that I need to approximate with an iir because of realtime requirements. For stability I want to break down the 10th order IIR generated with Steiglitz-Mcbride to biquads ...
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MATLAB IIRs — extracting and scaling the coefficients of second order sections

suppose I generate the following filter: ...
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427 views

How can slope of low-pass biquad be configured?

I have a biquad filter, configuread as a low-pass filter (using Zolzer's formulas, similar to these). It does not overshoot and decays nicely in what I assume is -40dB/dec. How can I device a ...
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Biquad Filter Transfer Function Frequency Response

$H(z) = G\cdot\displaystyle\frac{2b_0\left(1-z^{-2}\right)}{1-2a_1z^{-1}-2a_2z^{-2}} + 1$ I have a data sheet with the above transfer function, I need to calculate its frequency response in code. I ...
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241 views

How is a realtime BiQuad/IIR possible?

I was thinking, if a realtime system is one in which the processing time is shorter than the sampling period, how does a feedback filter such as a biquad perform the computation without waiting for, ...
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372 views

IIR biquad coefficients for negative frequencies in IQ data?

Assume I have a (single real float channel) biquad IIR filter implemented in C, and some coefficients for a bandpass filter (right out of RBJ's cookbook). If I convert the input, output, data path, ...
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Digital Biquad filters

The only 'authoritative' web reference (=very often linked) for calculating the coefficients for digital biquad filters seems to be this: http://www.musicdsp.org/files/Audio-EQ-Cookbook.txt Does ...

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