Tuesday, December 15, 2009
Rangkaian TL072 Audio Power Amplifier
This TL072 power amplifier circuit providing an ac voltage gain of 4, in order to drive less sensitive power amplifiers. As modern Hi-Fi home equipment is frequently fitted with small loudspeaker cabinets, the bass frequency range is rather sacrificed. This circuit features also a bass-boost, in order to overcome this problem. You can use a variable resistor to set the bass-boost from 0 to a maximum of +16dB @ 30Hz. If a fixed, maximum boost value is needed, the variable resistor can be omitted and substituted by a switch.
Note:
- A log type for P2 ensures a more linear regulation of bass-boost.
- Please note that, using SW1, the boost is on when the switch is open, and off when the switch is closed.
List Component:
P1_________________10K Log.Potentiometer
P2________________100K Log.Potentiometer
R1,R2_____________100K 1/4W Resistors
R3,R6______________15K 1/4W Resistors
R4_________________10K 1/4W Resistor
R5_________________22K 1/4W Resistor
R7__________________1K 1/4W Resistor
R8________________560R 1/4W Resistor
C1,C2,C5____________2µ2 63V Electrolytic Capacitors
C3________________470µF 35V Electrolytic Capacitor
C4__________________1µF 63V Polyester Capacitor
C6_________________47nF 63V Polyester Capacitor
C7_________________22µF 25V Electrolytic Capacitor
IC1_______________TL072 Dual BIFET Op-Amp
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