LG C1150 Service Manual page 29

3. TECHNICAL BRIEF
• AD6537B is an ADI designed processor.
• AD6537B consists of
1. BB Transmit section
• This section generates in-phase and quadrature BB modulated GMSK signals.
• Digital GMSK modulator, 10-bit DACs, Reconstruction Filter
2. BB Receive section
• 2 identical ADC channels that process BB in-phase and quadrature input signals.
3. Auxiliary section
• 2 auxiliary DASs → AFC DAC, IDAC, AUX ADC
• AUX ADC : 6 channels 10 bits
AFC DAC : 13 bits
IDAC : 10 bits
4. Voiceband section
• Receive audio signal from MIC.
Send audio signal to Speaker
• It interconnect with external device like main microphone, main receiver, earmicrophone
and Hands-free kit.
5. Power Management section
• 8 LDOs Block in the AD6537B. VCORE, VMEM, VEXT, VSIM, VRTC, VABB, VMIC,
VVCXO
• Battery Charging Block
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