LG GX300 Service Manual page 60

Digital-to-analog converters
The multi-bit oversampling DACs of the X-GOLD™213 audio front-end convert the 16-bit data words
coming from the digital interpolation filters to analogue signals.
Output Amplifier
The different output buffers in X-GOLD™213 are driven by the outputs of the selection block. The
differential earpiece driver can be used to drive a 16
ended headset drivers can be used to drive a 16
coupling of the headset might be needed, or can work also in bipolor mode. The differential loudspeaker
driver can be used to drive a 8
higher harmonics of the switching signals
has to be achieved by the external circuitry. The buffers are designed to be short circuit protected.
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headset. They can work unipolar mode, where an AC
loudspeaker. As it is a class-D amplifier the needed suppression of the
Figure 3.13.3 Switching for R/L DACs onto Buffers
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earpiece and works in differential. The two single
3. TECHNICAL BRIEF
3. TECHNICAL BRIEF
LGE Internal Use Only