> 4.8 | Sample Circuit for a PDA Application Using an AC97 Codec

> Figure 23: Block circuit of a complex application using WM9713 or WM9714 codec
> The complex codec from Wolfson incorporates already many of the commonly needed audio functions. If a complex functionality is requested, it is recommended to use the capabilities of these especially designed chips.
> One of the benefits of the Wolfson solution is the possibility of substracting signal EPP2 and EPN2 before it is fed into the internal switch matrix. This saves the conversion circuit from the balanced signal into unbalanced.