Canon S230 manual Abbreviation in Block Diagrams

2.6 Abbreviation in Block Diagrams

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