BB Troubleshooting and Tuning Guide
The earpiece is driven directly by a built-in linear power amplifier included in the EM ASIC N2200 ASIC. The
output has a differential output configuration. Signal lines are biased by the EM ASIC N2200.
The vibra is driven directly by a built-in digital pulse modulated amplifier included in the EM ASIC N2200 ASIC.
The output has a differential output configuration.
Nokia AV stereo output is driven by a discrete stereo headphone amplifier that is connected to the single-
ended outputs of the EM ASIC N2200 ASIC (shared output with the discrete stereo speaker amplifier). The
discrete stereo headphone output has a single-ended ground reference output. It's controlled gain change
via I2C IF.
Page 3 –63
Copyright © 2007 Nokia. All rights reserved.