Electronic Definitions (O)

[O] Presenting a list of electronic terms starting with letter o that are available for more detailed lookup for their definitions or abbreviation explanation. All terms are listed in alphabetical order for easy browsing.


Electronic Acronyms and Terms For [O] Description

Other Electronic Terms Somewhat Related;


"Office Automation"



"Over Air Addressing"  

Object Program

- Is the translated version of a program that has been assembled or compiled  


"Optical Character Recognition"
- Is machine recognition of stylised characters by light sensing methods


"Officer Candidate School"  

Octal Notation

- Is the system using base eight and the digits 0 1 2 7  


- A factor of 2. Often used with frequency ratios of 2, as in an octave of frequency referring to a 2:1 change in frequency.  

Odd Parity

- Is present in any binary representation in which the number of Is in the representation is odd

parity bit, parity check


"Original Equipment Manufacturer"  

Off Hook

- The condition which nowadays indicates the active state of the local loop  

Off Line Processing

- Is processing carried out by devices not under the control of the central processor  

Offset Fed Antenna

- An antenna with a reflector that forms only part of a paraboloid of revolution usually excluding the pole or apex such that a front feed causes no aperture blockage  

Offset Stepping

- Staggering of circuit traces or via hole pads  


"On Hook Dialing"

- Allows numbers to be dialled without lifting the handset


Ohmic Region

- The part of the drain curves that starts at the origin and ends at the proportional pinchoff voltage

pinchoff voltage, proportional pinchof voltage, proportional pinchoff voltage

Ohm`s Law

- Mathematical relationship between current, voltage and resistance stating that when a voltage is applied to a metal conductor, the current moving through the conductor is proportional to the applied voltage.  


"Organisation International de Radiodiffusion et Television"  


- Oki Electric Industry Co., Ltd., commonly referred to as OKI, OKI Electric or the OKI Group, is a Japanese company manufacturing and selling info-telecom and printer products.  


"OrthogonalMode Transducer"

head unit

On Hook

- The condition which indicates the inactive state of the local loop

on hook dialing

On Line Processing

- Is processing performed on equipment directly under the control of the central processor whilst the user remains in communication with the computer.  


"OnOff Keying"  

Op Amp

- A high gain dc amplifier that provides usable voltage gain for frequencies from 0 to over 1 MHz

linear op amp circuit


- Refers to a component or connecting wire that has an open circuit, equivalent to a high resistance approaching infinity

open subroutine

Open Subroutine

- Is one that is part of the main program and is copied into the program where required  

Operation Code

- Is the part specifying the operation to be performed  

Operator`s Console

- Is an input/output device that consists of a keyboard and a VDU (or in some cases switches and display lamps). It is used by the operator to control the computer.)  


"Organiser Programming Language"

- Used in the Symbian platform for rapid application development


Optical Mark Reader

- Is an input device that reads marks made in predetermined positions on special forms (or cards) by a light sensing method  

Optimum Q Point

- The point where the ac load line has equal maximum signal swings on both half-cycles  


- A combination of a LED and a photodiode. An input signal to the LED is converted to varying light which is detected by the photodiode. The advantage is very high isolation resistance between the input and output.  


- An OPL extension DLL providing language extension procedures



- Mutually at right angles

802.11a, cofdm, polarisation, polarisation rotor/rotator x/y


"Operating System"

- Is a program or suite of programs that controls the entire operation of the computer handling I/O operations interrupts user requests etc.

oscillations, osi


- The death of an amplifier. When an amplifier has positive feedback, it may break into oscillations, which is unwanted high-frequency signal.

compensating capacitor, ground loop


"Open Systems Interconnection"



"One Time Programmable"  


"Orbital Test Satellite"  


"Ovonics Unified Memory"  

Outboard Transistor

- A transistor placed in parallel with a regulating circuit to increase the amount of load current that the overall circuit can regulate. The outboard transistor kicks in at a predetermined current level and supplies the extra current needed by the load.  

Outgoing Message

- Message played to caller on a TAM

digital ogm

Output Device

- Is a peripheral unit that translates signals from the computer into a human readable form or into a form suitable for reprocessing by the computer at a later stage

graphical display unit, interrupt, music synthesiser, paper tape punch, plotter, printer, speech synthesiser

Output Impedance

- Another term used for the Thevenin impedance of an amplifier

closed loop quantity

Output Offset Voltage

- Any deviation or difference of the output voltage from the ideal output voltage  

Oval Extension

- Material added to hole land patterns for added strength or to prevent drilled hole break-out on small via interconnections  


- Occurs when arithmetic operations produce results which are too large to store

overflow flag

Overflow Flag

- Is a single bit that is set to 1 when overflow occurs during an arithmetic 36 Key operation  


- Is the process by which convenient subdivisions (segments) of a large program are brought from backing store for processing  


- Using a load resistance so small that it increases the voltage gain of an amplifier by a noticeable amount

buffer amplifier


- Is the erasing of a data item from store by writing another in its place  


"Optimum Working Frequency"  


- An OPL header file for inclusion in OPL source code, specifying the public interface to an OPX. Published by the OPX provider.  


- A reaction where something loses electrons. Given that oxygen will strip electrons from most elements, this has historically meant a reaction involving oxygen. A cathode (electron emitter) is constantly oxidized as it looses electrons.



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