Micro-sized-amplifier


Posted on Sep 30, 2012

Sound detected by electret microphone MIC1 is fed to IC1`s input through resistor R2, and capacitors Cl and C2. Resistors R2 and R5 determine the overall stage gain, while C2 partially determines the amplifier`s frequency response. To ensure proper operation, use a single-ended power supply. R3 and R4 simulate a null condition equalto half the power supply`s voltage at IC1`s noninverting input. The output of IC1 is transferred to emitter-follower amplifier Ql via volume control R6.


Micro-sized-amplifier
Click here to download the full size of the above Circuit.

The high-Z-in/low-Z-out characteristic of the emitter-follower matches the moderately high-impedance output of IC1 to a low-impedance headphone load.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

EAGLE PCB Layout Editor
LED Hat Display with Pong using an Arduino
pic micro multiple servo motor
Simple Hybrid Audio Amplifier
1.25 ~ 37V LM317 adjustable power supply configuration
Homemade wireless remote control circuit diagram



Top