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Panasonic KX-TCD450 Series

Panasonic KX-TCD450 Series
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20 CIRCUIT OPERATION (BASE UNIT)
20.1. Outline
Base Unit consists of the following ICs as shown in BLOCK DIAGRAM (BASE UNIT) (P.57).
·
DECT BBIC (Base Band IC): IC2
Handling all the audio, signal and data processing needed in a DECT base unit
Controlling the DECT specific physical layer and radio section (Burst Module Controller section)
ADPCM codec 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 module, EEPROM, LED, Analog Front End, etc.)
·
RF Module: IC3
PLL Oscillator
Detector
Compress/Expander
First/Second Mixer
Amplifier for transmission and reception
·
EEPROM: IC1
Temporary operating parameters (for RF, etc.)
·
Flash Memory: IC4
Program Code
·
Additionally,
Power Supply Circuit (+4.0V, +2.65V output)
Crystal Circuit (10.368MHz)
Charge Circuit
Telephone Line Interface Circuit
58
KX-TCD450RUM / KX-A145RUM / KX-TCD450RUT / KX-A145RUT

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