Wien-bridge-filter


Posted on Jun 14, 2012

Most audio tone controls affect midband gain, and !bey often create booming or hissing sounds when activated. You can avoid tbese problems by using a dual Wien-bridge filter to provide independent control of tbe treble and bass frequencies. Experiments witb equalizers indicate that tbe optimum center frequencies are about 100 Hz and 8 kHz.


Wien-bridge-filter
Click here to download the full size of the above Circuit.

Using the relation/= (21fRC)-1, set the Fig. 1 values accordingly: 100Hz: R1 = 15 KO; C1 0.1 p,F 8kHz: R2 = 16 KO; C2 1.3 nF R3 and C3 provide stability. You obtain a ±9 dB variation of treble and bass by adjusting potentiometers R4 and R5, respectively. The filter"s frequency response is shown in Fig. 2.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Transistor Sensor Temperature Measurer
Car Battery And Alternator Monitor Circuit
digitalVolume
Metal detector schematic circuit using CS209A
crystal oscillator circuits
Current Mirror for LEDs
DTMF Decoder Relay Driver
500A-6V single-phase power supply circuit Thyristor electroplating
Zero-power regulator circuit diagram



Top