8
KX-TG8011MES/KX-TGA800MES
4.2.
Circuit Operation (Base Unit)
4.2.1.
Outline
Base Unit consists of the following ICs as shown in
Block Diagram (Base Unit)
(P.7).
• DECT BBIC (
B
ase
B
and IC): IC7
- Handling all the audio, signal and data processing needed in a DECT base unit
- Controlling the DECT specific physical layer and radio section (
B
urst
M
odule
C
ontroller section)
- ADPCM code filter for speech encoding and speech decoding (DSP section)
- Echo-cancellation and Echo-suppression (DSP section)
- Any tones (tone, sidetone, ringing tone, etc.) generation (DSP section)
- DTMF receiver (DSP section)
- Clock Generation for RF Module
- ADC, DAC, timer, and power control circuitry
- All interfaces (ex: RF Power Amp., EEPROM, LED, Analog Front End, etc.)
- PLL Oscillator
- Detector
- Compress/Expander
- First Mixer
• RF Power Amp.: IC801
- Amplifier for transmission and reception
• EEPROM: IC401
- Temporary operating parameters (for RF, etc.)
• Additionally,
- Power Supply Circuit (+3.0 V, +2.4 V, +1.8 V output)
- Crystal Circuit (10.368 MHz)
- Charge Circuit
- Telephone Line Interface Circuit
Содержание KX-TG8011MES
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Страница 34: ...34 KX TG8011MES KX TGA800MES Cross Reference Check Point Handset P 44 ...
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Страница 50: ...50 KX TG8011MES KX TGA800MES 10 2 How to Replace the Handset LCD ...
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