Second Order Active Bandpass Filter Module Traffic filter Can Be Audio Filter

 Second Order Active Bandpass Filter Module Traffic Filter Can Be Audio Filter

Description:

1, two order active band pass filter module, analog filter, AC signal filter, can effectively improve the signal to noise ratio
2, plate load chip LED power indicator light

3, use: adjust the different frequency range can be used as a variety of different purposes; the frequency range of 300Hz-3KHz, can be used as a voice filter, audio filter, can effectively remove the noise, the effect is very good

4.Onboard op amp chip can be replaced, the default delivery plate carrier chip lm358, if the customer request custom frequency will replace the corresponding chip model according to the different actual cut-off frequency demand. Customers can also go back to replace the chip, to meet the requirements of the corresponding frequency.

5, the default delivery frequency range is 300Hz-3KHz, according to the customer needs to set up the required frequency. Custom free. Users can also be required to go back to change the value of the resistance capacitance, thereby changing the cutoff frequency and amplification.

6, the method of the general setting cut-off frequency is as follows:
C2=C3=C ,R9=R10=R,determines the low frequency cutoff frequency
C5=C6=C,R7=R8=R,determines the high frequency cutoff frequency
Cutoff frequency F=1/ (2*PI*R*C), PI is 3.14
The general resistance value is not less than 8.2K ohm

According to this formula, the resistance capacitance value of the cut-off frequency can be calculated and then replaced. Setting method is simple and easy to operate, but we will not take any responsibility if you go back to set up.

7, pin according to customer demand can be replaced in the row.

8, signal amplification ratio is about 2.5 times
9, the stop band attenuation rate is -40dB/10 frequency range

10, wiring is simple and easy to use, pinout, VCC and GND respectively for the power supply and the input port, IN port reception filter signal, OUT port output filtered signal
11, single power supply, the power supply voltage range is 3.3V-32V

12, if VCC exceeds 16V, self must change the by default onboard 100uF/16V SMD aluminum electrolytic capacitors to 100uF/35V SMD aluminum electrolytic capacitors;and LED current limiting resistor R1 originally 1K ohm default value must be replaced with a larger value, to prevent the LED lamp is burnt out.

13, with 4 fixed holes, easy to install
14, board size 38 (mm) X20 (mm)

15.2 active bandpass filters are connected in series to form a 4 order active bandpass filter.
     3 active bandpass filters are connected in series to form a 6 order active bandpass filter.
     4 active bandpass filters are connected in series to form a 8 order active bandpass filter.
     And so on, can be made with DuPont line series

The 2 order active band pass filter frequency response diagram as follows:

Package Included:

1 * traffic filter

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