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3. TECHNICAL BRIEF
- SIM Card Supply
The SIM card supply is the VSIM regulator. This regulator has been designed to meet the power
supply standards established for SIM Cards.
- Microphone Power
The VMIC regulator is designed to act as a phantom bias supply for electret microphones used in
handsets and headset accessories. TDMA noise immunity is a design feature of the VMIC
regulator. VMIC features low output noise in the voice audio band and should be the only supply
used for microphone bias.
- Radio Reference Oscillator Power
The VRF regulator is a low out put noise supply with a specified TDMA ripple rejection. It is
designed to be the power supply for the system reference oscillator in the radio subsystem.
- DBB Real Time Clock Power
The VRTC regulator is included for the purpose of powering the DBB time of day clock (RTC). A
recommended backup circuit for use with VRTC is described in the section below.
- ABB Analog Supply
The ABB analog circuit supply VABB is for use by the AD6721 ABB only. The sole connection to
the VABB terminal should be the recommended bypass capacitor. The VABB regulator may not
be utilized by any devices other than the ABB IC.
3. MCP Memory PF38F4050L0ZBQ0 (INTEL )
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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