You can design some digital filters on this site.
The filters you can design are as follows.
- Moving average filter
- The gain types of low and high pass can be specified. Although the phase character of lowpass filter can keep linear phase, the it of highpass cannot.
- FIR filter
- The gain characters of the filter are 5 types, low,high,bandpass,bandeliminate, and allpass. These filters are designed as linear phase.
- IIR filter
- The gain characters of the filter are 4 types, low,high,band-pass, and band-eliminate. You can't designed them as linear phase but can specify a cutoff gain by a decibel unit.
You can take results showed as follows.
- *Gain character (magnification and decibel)
- *Phase character
- *Coefficient and Difference equations
- *Group Delay character
You can include the filters in some applications if you substitude the coefficent for difference equations. However, in case of 3 dimentions or more, the equation is resolved into factors as some pieces of 1 and 2 dimentional equations. For example, in case 3 dimentional equation is resolved into factors as 1 and 2 dimentional equations. In case 4 dimentional equation is resolved into factors as two pieces of 2 dimentional equations. In that case, you will be able to take the characters you wish, if you connect them by cascaded connection.
What's New
- 2014/02/02
- Added Differencial Filter on designing page.
- 2013/08/11
- Added Hirbert Filter on designing page.
- 2013/08/04
- Added Group Delay Characteristic on AVE/FIR/IIR designing pages.
- 2013/07/21
- Added pass and stop band gains on FIR designing page.(-40 to 40 [dB])
- 2013/07/15
- Added specific lists(freq,gain,phase) on AVE/FIR/IIR designing pages.Users can take specification of the filter as text lists.
- The max of tap number is changed from 99 to 199 on AVE and FIR Filter.
- The significant digit of AVE/FIR/IIR filter's coefficients are improved.
- 2013/07/07
- Added Kaiser window on FIR designing page. Users can specify the gain level between 22 to 200.
- 2012/12/22
- The digit of FIR/IIR filter's coefficients are improved from 6 to 8 after the decimal point.