Balanced microphone preamp project


Posted on May 6, 2012

Well, it's pretty much a PAiA preamp - usual input circuity followed by one half of dual op-amp rigged in fixed 20dB amplification circuity, followed by second stage which is adjustable for up to 40dB amplification, for up to 60dB total. The power supply is a simple affair, supplying +-12V using 7912 and 7812 regulators. As ECM8000 is happy with only 15 volts of phantom power, I added a 7805 which I referred to +12V instead of ground - resulting in 17V output which I used for phantom power.


Balanced microphone preamp project
Click here to download the full size of the above Circuit.

The schematics shows NE5532 op-amp which I was unable to get when I shopped for parts, so I used an ancient JRC4558D op-amp which I scavanged from PCB of old Yamaha synth (some people seem to be very fond of this chip, maybe some day someone will tell me




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Over-voltage protection circuit
Solar power related schematics
Design and simulation study of anti exciting type switching power supply of single-end
accelerometer Can internal PLL affect control logic in MEMS sensor
How to implement a soft power switch controllable by microcontroller
Combinational circuits Encoder Decoder
Digital frequency counter



Top