Balanced Line Driver & Receiver

Posted on Mar 5, 2013

With this simple project, you can have balanced lines too, simply adapting the unbalanced inputs and outputs of your hi-fi gear to become balanced, and then back to unbalanced at the other end. You can even be extra cunning, and power the remote converter from the cables carrying the signal. Professionally, this is called `Phantom Feed`, and is used to power microphones and other low current equipment. The version I have shown is actually a differential feed. Whilst not as good as a true 48V phantom powering circuit, it does work, and makes an interesting experiment (if nothing else).

Balanced Line Driver & Receiver
Click here to download the full size of the above Circuit.

Before we start, a brief description of the standard (unbalanced) and balanced line is in order. An unbalanced line is the type you have on the hi-fi, typically using an RCA connector, and feeding the signal through a coaxial cable. The inner cable carrie

Leave Comment

characters left:

New Circuits



Popular Circuits

ASCII Programmer PIC16F84
Digital Sawtooth Generator
Ind Meter Adapter
Electronic Die
Protection Circuit For Electrical Appliances From Power Supply Variations PCB
Transistor Testers
Digital Slave Flash Trigger PIC 12F675
Wide-band high-frequency electric field strength meter schematic