PCB Glossary

Analog In-circuit Test

A system measuring component values on a populated PCB before power is applied.

Analog In-circuit Test

PCB Glossary

Analog Functional Test

At the board level, various analog test signals are applied to a PCB through a switch to point out curren...

Analog Functional Test

PCB Glossary

Analog Circuit

A circuit comprised primarily of individual (discrete) components, such as resistors, capacitors, diodes, transistors, etc. T...

Analog Circuit

PCB Glossary

Analog Circuit Simulator

A tool used to verify the design (or portions thereof) in the analog domain by applying virtual test signals&n...

Analog Circuit Simulator

PCB Glossary

Ambient

The surrounding environment coming into contact with the system or PCB in question.

Ambient

PCB Glossary

Alkyd

A thermosetting resin with good electrical properties used for moulding the bodies of components.

Alkyd

PCB Glossary

Algorithm

A procedure for solving a problem, usually mathematical.

Algorithm

PCB Glossary

Air Gap

The non-conductive air space between current carrying conductors such as traces, pads, ground planes, etc.

Air Gap

PCB Glossary

Aging

The change of a property, e.g. solderability, with time.

Aging

PCB Glossary

Adhesive

A substance such as glue or cement used to fasten objects together. In surface mounting, an epoxy adhesive is&...

Adhesive

PCB Glossary

Adhesion Layers

The metal layer that adheres a barrier metal to a metal land on the surface of an integrated circuit.

Adhesion Layers

PCB Glossary

Additive Process

A process for obtaining conductive patterns by the selective deposition of conductive material on a clad or unclad&...

Additive Process

PCB Glossary

Activating

A chemical treatment for conditioning the surface of non-conductive materials for improved adhesion.

Activating

PCB Glossary

Acrylic Resin

A thermosetting ,transparent resin.

Acrylic Resin

PCB Glossary

Accuracy

The deviation of the measured or observed value from the accepted reference.

Accuracy

PCB Glossary

Access Holes

A series of holes in successive layers. Each set has a common centre or axis. The holes of a multi-layer&...

Access Holes

PCB Glossary

Accepted Quality Level (AQL)

The maximum number of defects per 100 units that can be considered satisfactory as a process average.

Accepted Quality Level (AQL)

PCB Glossary

Acceptance Test

The tests that determine the acceptability of boards as agreed to by purchaser/vendor.

Acceptance Test

Basic Oscillatory Circuits

Basic Oscillator Circuit The oscillatory circuit, also called the L-C circuit or tank circuit, consists of an inductive coil of inductance L connected in parallel with a capacitor of...

Electronic circuit

90 W audio power amplifier based on transistor

Using only four transistors in the quasi-complementary amplifier configuration, this transistor power amplifier circuit can deliver 90W of power into 4 ohm loads and at low cost. As shown in ...

audio power amplifier

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