Glossary of Mobile Phone Circuit Abbreviations
This glossary provides clear definitions of commonly used abbreviations found in mobile phone circuits, schematics, service manuals, and repair documentation. Understanding these terms is essential for mobile phone technicians, electronics students, and repair enthusiasts.
Numeric Generations
- 2G – Second Generation mobile network technology
- 3G – Third Generation mobile network technology
- 3GS – Third Generation Speed (enhanced 3G performance)
- 4G – Fourth Generation mobile network technology
A
- A/D Converter (ADC) – Converts analog signals into digital data
- ACI – Accessory Control Interface
- ADSP – Application Digital Signal Processor for high-level tasks
- AGC – Automatic Gain Control, regulates signal volume
- ALS – Ambient Light Sensor
- ARM – Advanced RISC Machines processor architecture
- ARPU – Average Revenue Per User
- ASIC – Application-Specific Integrated Circuit
B
- B2B – Board-to-Board connector
- BB – Baseband processor
- BSI – Battery Size Indicator
- BT – Bluetooth
C
- CPU – Central Processing Unit
- CDSP – Cellular Digital Signal Processor
- CMOS – Low-power semiconductor technology
- COF – Chip on Foil
- COG – Chip on Glass
- CW – Continuous Wave signal
D
- D/A Converter (DAC) – Converts digital data into analog signals
- DCT-4 – Digital Core Technology generation 4
- DMA – Direct Memory Access
- DSP – Digital Signal Processor
- DPLL – Digital Phase-Locked Loop
E
- EDGE – Enhanced Data Rates for GSM Evolution
- EMI – Electromagnetic Interference
- ESD – Electrostatic Discharge
F
- FR – Full Rate audio codec
- FPS – Flash Programming System
G
- GND – Ground connection
- GPRS – General Packet Radio Service
- GSM – Global System for Mobile Communication
H
- HF – Hands-Free
- HW – Hardware
I
- IC – Integrated Circuit
- IHF – Integrated Hands-Free speaker
- IMEI – International Mobile Equipment Identity
- IR – Infrared
L
- LCD – Liquid Crystal Display
- LDO – Low Dropout Voltage Regulator
- LED – Light Emitting Diode
M
- MCU – Microcontroller Unit
- MIC – Microphone
- MMS – Multimedia Messaging Service
P
- PA – Power Amplifier
- PLL – Phase-Locked Loop
- PWB – Printed Wiring Board
- PWM – Pulse Width Modulation
R
- RF – Radio Frequency
- RX – Radio Receiver
- RSSI – Received Signal Strength Indicator
S
- SAW Filter – Surface Acoustic Wave Filter
- SIM – Subscriber Identity Module
- SMPS – Switched Mode Power Supply
- SW – Software
T
- TCXO – Temperature Controlled Crystal Oscillator
- TX – Radio Transmitter
U
- UART – Universal Asynchronous Receiver/Transmitter
- USB – Universal Serial Bus
- UPP – Universal Phone Processor
V
- VBAT – Battery Voltage
- VCO – Voltage Controlled Oscillator
- VCTCXO – Voltage Controlled Temperature Compensated Crystal Oscillator
W
- WAP – Wireless Application Protocol
- WD – Watchdog Timer
X
- XHTML – Extensible HyperText Markup Language
Z
- Zocus – Current sensing circuit used for battery monitoring
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