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Add your own external resistors to set the cut off frequency anywhere within
a 1000:1 range. The filter modules require a noise free stable +/- 15 Volt
supply. Signal levels are +/- 10 V.
We can supply filter modules pre-set to a fixed frequency, contact us for
details.
Circuit and Connection Details
For more detailed circuit information, and data to
enable you to fit 1200 series filter modules to your products use the link here.
Stock
The following types are available from stock:-
| Filter Type |
Frequency |
Pass |
Size |
Kemo Type |
| Butterworth 24 dB/ Octave |
1 - 1000 Hz |
Low |
25x50x15mm |
1204/2/05
LP |
| Butterworth 24 dB/ Octave |
1 - 1000 Hz |
High |
25x50x15mm |
1204/2/05 HP |
| Butterworth 48 dB/ Octave |
1 - 1000 Hz |
Low |
50x50x15mm |
1208/2/03
LP |
| Butterworth 48 dB/ Octave |
1 - 1000 Hz |
High |
50x50x15mm |
1208/2/03 HP |
| Butterworth 24 dB/ Octave |
100 -100 kHz |
Low |
25x50x15mm |
1204/200/05
LP |
| Butterworth 24 dB/ Octave |
100 - 100 kHz |
High |
25x50x15mm |
1204/200/05 HP |
| Butterworth 48 dB/ Octave |
100 - 100 kHz |
Low |
50x50x15mm |
1208/200/03
LP |
| Butterworth 48 dB/ Octave |
100 - 100 kHz |
High |
50x50x15mm |
1208/200/05 HP |
| Bessel 24 dB/ Octave |
1 - 1000 Hz |
Low |
25x50x15mm |
1204/2/09
LP |
| Bessel 48 dB/ Octave |
1 - 1000 Hz |
Low |
50x50x15mm |
1204/2/07
LP |
| Bessel 24 dB/ Octave |
100 - 100 kHz |
Low |
25x50x15mm |
1204/200/09
LP |
| Bessel 48 dB/ Octave |
100 - 100 kHz |
Low |
50x50x15mm |
1204/200/07
LP |
| Bessel 48 dB/ Octave |
1 - 1000 Hz |
High |
50x50x15mm |
1204/2/07 HP |
| Bessel 48 dB/ Octave |
100 - 100 kHz |
High |
50x50x15mm |
1204/200/07 HP |
| Anti-aliasing |
1 - 1000 Hz |
Low |
50x50x15mm |
1208/2/01
LP |
| Anti-aliasing |
1 - 1000 Hz |
High |
50x50x15mm |
1208/2/01 HP |
| Anti-aliasing |
100 - 100 kHz |
Low |
50x50x15mm |
1208/200/01
LP |
| Anti-aliasing |
100 - 100 kHz |
High |
50x50x15mm |
1208/200/01 HP |
| General Purpose |
1 - 1000 Hz |
Low |
50x50x15mm |
1208/2/41
LP |
|
General Purpose |
1 - 1000 Hz |
High |
50x50x15mm |
1208/2/41 HP |
|
General Purpose |
100 - 100 kHz |
Low |
50x50x15mm |
1208/200/41
LP |
|
General Purpose |
100 - 100 kHz |
High |
50x50x15mm |
1208/200/41 HP |
| Notch Q=10 |
10 - 10 kHz |
Notch |
50x50x15 |
1208/20/NQ10 |
Filter Module Response Curves
Download
the pdf version of the standard
filter response curve sheet, OR click on the filter type number for the
specific pdf filter response data sheet.
Full pdf 1200 Module
data sheet with specification.
BandPass Filter Modules
We do not hold a stock range of bandpass electronic filters, each
requirement is different. In some cases the AC coupling on the Kemo carrier
cards reduces the need for low frequency highpass filtering.
The usual solution for band pass is to use a combination of two filter
modules, one highpass and one lowpass. This is a very flexible method; sharp
bands can be made from high and lowpass Response 01 filters, or more gentle
bands from response 41 or 03.
Not sure of the frequencies required? or think they may need to be changed.
Then a pair of 1600 programmable modules fitted to a Kemo carrier card with
easy to change dip switches are a good solution.
Click here to go to the filter module carrier card
section.
Contact us to discuss your requirements.
Notch Filter Modules
Notches are easier than bandpass electronic filter modules, in most cases a
notch is required to eliminate one frequency, usually 50 or 60 Hz.
We have
several notch filters available, the sharpest with a Q of around 10. The
response curve for this electronic filter module set to 50 Hz is shown below.
Click here for
the pdf Notch Filter Response curve.
Support for older Filter Modules
A note for long-standing users of our modules: we try to provide the highest level of support for all our customers and for service needs we can recreate many of the modular products we have produced in the last three decades. Also contact us for advice on replacing products from defunct suppliers.
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