KX-TC1205RUB / KX-TC1205R UW / KX-TC1205R US / KX-TC1205RUF
16 CIRCUIT OPERATION
16.1. Outline
Base unit consists of the following ICs as shown in BLOCK DIAGRAM.
∙CPU:IC2
−Controlling the whole system
−Forming/analyzing all data signals (ACK, CMD signal etc.*)
−All interfaces (ex: LED, KEY, SP, Mic, LCD, Detector Circuit (Charge/ Power Down) *Refer to EXPLANATION OF CPU DATA COMMUNICATION (P.32).
∙RF IC:IC1
−PLL Oscillator
−Detection
−Compress/ Expander
−first/ second mixer
−Amplifier for transmission and reception
∙Additionally,
−Power Supply Circuit
−Reset Circuit
−Charge Circuit
−Telephone Line Interface Circuit
Handset consist of the following ICs as shown in BLOCK DIAGRAM.
∙CPU: IC2
−All data signals (forming/analyzing ACK or CMD signal*)
−All interfaces (ex; LED, Key, Buzzer, Detector Circuit, Charge, Battery Low)
−RAM for keeping the data (CH Number, ID Code, etc.)
∙RF IC:IC1
−PLL Oscillator
−Detector
−Compress/Expander
−first, second mixer
−Amplifier for transmission and reception
*Refer to EXPLANATION OF CPU DATA COMMUNICATION (P.32).
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