have a good day.
could anyone help me please, i would like to design a low pass filter, but i dont know how should implement this in psoc creator,
the imput and output pins i cant find.
Note that PsoC 3 has a digital filter. We move in data to the staging register(input) and read the output from the holding register(output) of Digital filter block(DFB) using CPU/DMA. Refer the following example project for details:
Hi to everyone! I would use some help about one assigment, and I'll be grateful if you could help me. The assigment is on two input signal, I need to calculate the efective value and I need to let the signal who has bigger effective value on the gate. My solution on this problem is the following:
Yes it is possible to implement the algorithm, the way you have explained. Please tell us a little more about the nature of the signals being compared.
I'd like to implement three bandpass filters with the CY8CKIT-001 PSOC DEVELOPMENT Kit. I read some information about PSoc filters into the forum and I read the AN2099 application note too, but I'm still not sure that they can be implemented and how would can I do it.
The filter's characteristics are:
Filter1: Fs=105Hz Fi=45Hz B=60Hz Fr=68,7Hz Q=1,14
Filter2: Fs=145Hz Fi=65Hz B=80Hz Fr=97Hz Q=1,21
Filter3: Fs=8Hz Fi=0,5Hz B=7,5Hz Fr=2Hz Q=0,26
If it is really possible to implement these kind of filters, what would be the best method, using DBF blocks, SC/CT o FIR filters?.
In PSoC3, filters can be implemented using the DFB component that is available with PSoC Creator. Please see the following thread, http://www.cypress.com/?app=forum&id=2232&rID=41747. It is not possible to implement these filters in SC/CT blocks, like in the case of PSoC1.
You may want to be more descriptive in what you need so that others can see what it is you need help with.
For example: What does the digital filter need to do? Have you already made one and it doesn't work, or are you looking for a place to start?
The choice to use an Analog or Switch Capacitor or Digital has a number of design
characteristics from each.
Simplest filters are 2 pole single stage MFB filters, Sallen Key for low sensitivity. Also exhibit
low noise. Dependent on external RC components. Not tunable easily.
SCT, SCF filters are good for minimizing externals, but a little more noisy. A little more
capability to tune. But not continuous as caps and ratio of capacitors finite.
Digital, you have finite length word effects from A/D thru MAC to D/A. Much more accurate
if the word length supports it.
There are many good texts on this topic with technology comparisons.
First you have to decide what filter response you want, passband ripple, and
stopband performance you are seeking, eg. how much out of passband rejection
you want. Generally this is a direct result of filter order and finite machine length
word size and taps.
Here is a cascade of Hilbert and LP to effect a basic BP to your partial specs.
Using Blackman window, each 64 taps.