15 CIRCUIT OPERATION (BASE UNIT)
15.1. Outline
Base Unit consists ofthe following ICs as shown in
BLOCK DIAGRAM (BASE UNIT)
(P.45).
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DECT BBIC (
B
ase
B
and IC): IC8
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Handling all the audio, signal and data processing needed in a DECT base unit
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Controlling the DECT specific physical layer and radio section (
B
urst
M
odule
C
ontroller section)
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ADPCM code filter for speech encoding and speech decoding (DSP section)
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Echo-cancellation and Echo-suppression (DSP section)
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Any tones (tone, sidetone, ringing tone, etc.) generation (DSP section)
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DTMF receiver (DSP section)
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Clock Generation for RF Module
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ADC, DAC, timer, and power control circuitry
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All interfaces (ex: RF module, EEPROM, LED, Analog Front End, etc.)
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RF Module: IC2
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PLL Oscillator
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Detector
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Compress/Expander
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First Mixer
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Amplifier for transmission and reception
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EEPROM: IC3
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Temporary operating parameters (for RF, etc.)
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Additionally,
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Power Supply Circuit (+3.3V, +2.5V, +1.8V output)
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Crystal Circuit (10.368MHz)
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Charge Circuit
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Telephone Line Interface Circuit
46
KX-TCD816UAS / KX-TCD816U AT / KX-TCA181UAS / KX-TCA181UAT
Summary of Contents for KX-TCD816UAS
Page 11: ...4 5 For Service Hint 11 KX TCD816UAS KX TCD816UAT KX TCA181UAS KX TCA181UAT ...
Page 53: ...19 SIGNAL ROUTE 53 KX TCD816UAS KX TCD816UAT KX TCA181UAS KX TCA181UAT ...
Page 59: ...22 ENGINEERING MODE 22 1 Base Unit 59 KX TCD816UAS KX TCD816UAT KX TCA181UAS KX TCA181UAT ...
Page 62: ...22 2 Handset 62 KX TCD816UAS KX TCD816UAT KX TCA181UAS KX TCA181UAT ...
Page 78: ...29 2 KX TCA181UAS UAT 78 KX TCD816UAS KX TCD816UAT KX TCA181UAS KX TCA181UAT ...
Page 80: ...30 3 Charger Unit 80 KX TCD816UAS KX TCD816UAT KX TCA181UAS KX TCA181UAT ...
Page 94: ...Memo 94 KX TCD816UAS KX TCD816UAT KX TCA181UAS KX TCA181UAT ...