G
gaz250587
Guest
Hi there,
For my university project I am designing something that needs an audio out via headphones.
I have a DAC that will take PCM data from a microprocessor that will give 0-5V. The DAC output goes into a headphone amplifier.
This is where I get confused. Does the signal need to be around 0V so it can swing positively and negatively? The headphone amplifier has a bias pin but i'm really not sure whether the signal needs to be biased?
Someone told me to bias it at 2.5V and then stick a cap in series from the output of the headphone amplifier to the headphone socket itself to negate any DC.
Any ideas on what I should do?
Thanks!!
For my university project I am designing something that needs an audio out via headphones.
I have a DAC that will take PCM data from a microprocessor that will give 0-5V. The DAC output goes into a headphone amplifier.
This is where I get confused. Does the signal need to be around 0V so it can swing positively and negatively? The headphone amplifier has a bias pin but i'm really not sure whether the signal needs to be biased?
Someone told me to bias it at 2.5V and then stick a cap in series from the output of the headphone amplifier to the headphone socket itself to negate any DC.
Any ideas on what I should do?
Thanks!!