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19 CIRCUIT OPERATION
19.1. 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.34).
•
• •
• 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.34).
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KX-TC2000NZB / KX-TC2000NZW / KX-TC2000NZF