Bandpass Filter | Electronic Project Circuits

Posts Tagged ‘Bandpass Filter’

Voice Bandwidth Filter

This circuit passes frequencies in the 300Hz – 3.1kHz range, as present in human speech. The circuit consists of cascaded high-pass and low-pass filters, which together form a complete band-pass filter. One half of a TL072 dual op amp (IC1a) together with two capacitors and two resistors make up a second-order Sallen-Key high-pass filter. With the values shown, the cut-off frequency (3dB point) is around 300Hz. As the op amp is powered from a single supply rail, two 10kO resistors and a 10µF decoupling capacitor are used to bias the input (pin 5) to one-half supply rail voltage.
The output of IC1a is fed into the second half of the op amp (IC1b), also configured as a Sallen-Key filter. However, this time a low-pass function is performed, with a cut-off frequency of about 3.1kHz. The filter component values were chosen for Butterworth response characteristics, providing maximum pass-band flatness. Overall voltage gain in the pass-band is unity (0dB), with maximum input signal level before clipping being approximately 3.5V RMS. The 560O resistor at IC1b’s output provides short-circuit protection.
Author: M. Sharp – Copyright: Silicon Chip Electronics
Source: http://www.extremecircuits.net/

Be the first to comment - What do you think? Posted by admin - September 8, 2010 at 4:03 am

Categories: Oscillator generator, RF-Radio Frequency Tags: active bandpass filter, Bandpass Filter, high pass filter, Low Pass Filter

1khz bandpass filter by ic lm324

When you want band pass Filter Frequency circuit 1KHz size in model easiness. I begs for to advise this circuit , because it uses , IC LM324 OP-amp highly popular the one number. By this circuit Filter frequency 1kHZ especial can change only. By we can can fix with R1,C1,C2 , and R2. Lay vacate other see in circuit picture.or not view other images in Filter circuits using op amp

Be the first to comment - What do you think? Posted by admin - July 7, 2010 at 10:09 am

Categories: Op-amp circuit, Oscillator generator Tags: Bandpass Filter, Filter circuits using op amp, LM324

Noise Filter Signal using FET 2N3819

This be Noise Filter Circuit for filter the frequency disturbs all well. By use base type equipment the FET transistor number 2N3819 and Electronic part The other a little again. It can be usable economize with. By the circuit will decrease frequency tall signal more 20KHz well. Then can apply in side sound circuit well , and still have still can fine decorate filter noise level has as well yes.