Wiki

Analog Devices Wiki

English
English
简体中文
简体中文
日本語
日本語
Руccкий
Руccкий

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Next revision		Previous revision
resources:tools-software:sigmastudio:toolbox:filters:general2ndorderlookup [21 Jun 2012 21:54] – created Brett Gildersleeveresources:tools-software:sigmastudio:toolbox:filters:general2ndorderlookup [09 Jan 2021 00:57] (current) – user interwiki links Robin Getz
Line 1: Line 1:
-<WRAP center round todo 60%> +======General (2nd-Order / Lookup)====== 
-Under Construction + 
-</WRAP>+[[resources:tools-software:sigmastudio:toolbox:filters|Click here to return to the Filters page]]\\ 
 +--------------------------------------------------------------------------------------------------------- 
 + 
 +{{ general2ndlookpic1.png}} 
 +The General (2nd-Order / Lookup) block gives access to a wide variety of 2nd-order IIR (infinite impulse response) filter algorithms. See [[resources/tools-software/sigmastudio/toolbox/algorithminformation/general2ndorderfilters|General 2nd-Order Filters]] (in Algorithm Information) for details about the algorithms driving these blocks.  
 + 
 +The filters available are: 
 +  * Tone 
 +  * Peaking  
 +  * General LP/HP  
 +  * Butterworth LP/HP  
 +  * Bessel LP/HP  
 +  * Chebyshev LP/HP 
 + 
 +This  block is implemented by a [[ez>message/73876|double-precision]] biquad filter that has multiple sets of coefficients in tables on the DSP. To select curves (lookup), use an [[resources:tools-software:sigmastudio:toolbox:leveldetectorslookuptables:indexlookuptable|Index Lookup Table]], a [[resources:tools-software:sigmastudio:toolbox:counters:counter|Counter]] block, or a [[resources:tools-software:sigmastudio:toolbox:sources:dcinputentry|DC Input block]] in your design and connect it to the red pin. Using the GPIO blocks you could control the selected responses with a knob, rotary encoder or button. 
 + 
 +**To open the Filter Control Window:** 
 + 
 +Click the icon button:{{general2ndlookpic2.png}}. The curve is defined using the Tone Control window (shown below). 
 + 
 +Enter the number of curves desired in the # Curves field. 
 +Enter Boosts, (overall) Gain, and Q in their fields. 
 +Enter the desired cutoff or center (peaking filters) frequency in the Frequency fields. 
 +Other parameters to enter will vary with filter type. 
 + 
 +The variety and range of filters are remarkable, as can be seen from the following examples:\\ 
 +\\ 
 +{{general2ndlookpic3.png}}\\ 
 +{{general2ndlookpic4.png}}\\ 
 +{{general2ndlookpic5.png}}\\ 
 +{{general2ndlookpic6.png}}\\ 
 +{{general2ndlookpic7.png}}\\  
 + 
 +<WRAP round help>Note: For n curves, the selected index should not exceed n - 1, i.e., the index range is 0 to n - 1. If you select an n th curve, misbehavior or errors may result.</WRAP>
  
resources/tools-software/sigmastudio/toolbox/filters/general2ndorderlookup.1340308497.txt.gz · Last modified: 21 Jun 2012 21:54 by Brett Gildersleeve

Page Tools