Canon PowerShot G5 Service Manual - Page 144

2.8 Abbreviation in Block Diagrams Abbreviation Nominal name ADC Analog-to-Digital (A/D) Converter AE Automatic Exposure control AF Automatic Focussing control AND Logic AND circuit R-Y/B-Y BPF Band-Pass Filter BUFFER Buffer circuit C Chrominance signal CCD Charge-Coupled Device CDS Correlated Double Sampling system COMP.VIDEO Composite video signal COMPARATOR Voltage comparator CPU Central Processing Unit DAC Digital-to-Analog (D/A) Converter DRAM Dynamic Random Access Memory DSP Digital Signal Processing EEPROM Electrically Erasable PROM EVF Electronic View Finder FET Field Effect Transistor FLASH MEMORY HPF I/F IGBT INV. IR IRIS LCD LED LPF NTSC OP Amp OR OSC PAL PLL PROM PWM REG. RTC SDRAM SECAM SW REG TG USB VCO VCXO XE Y High-Pass Filter InterFace Insulated Gate Bipolar Transistor Logic Inverter circuit InfraRed ray Iris Liquid Crystal Device Light Emitting Diode Low-Pass Filter National Television System Committees OPerational Amplifier Logic OR circuit OSCillator Phase Alternating by Line Phase Locked Loop Programmable Read Only Memory Pulse Width Modulation REGulated power supply Real Time Clock Synchronous Dynamic RAM SEquential Colour À Mémoire SWitching REGulator Timing Generator Universal Serial Bus Voltage Controlled Oscillator Voltage Controlled X'tal Oscillator Xenon Tube Y-signal Description Color difference signals of TV system Color component signal of TV system CCD imager Memory with which read and write are freely possible. Typically DSP device PROM that is electrically erasable. Non-volatile memory with which write and read are freely possible. The circuit that interconnects 2 devices or circuits. Conductivity-modulation type FET transistor Typically LCD display Typically LED display NTSC color TV system developed in USA PAL color TV system developed in Germany Non-volatile memory in which program can be written. Reference clock oscillator DRAM whose bus interface is synchronous. SECAM color TV system developed in France Switching type regulated power supply device USB type serial data communication system Luminance component signal of TV system