Browse Definitions :
Definition

gallium arsenide field-effect transistor (GaAsFET)

Also see metal-oxide semiconductor field-effect transistor .

A gallium arsenide field-effect transistor (GaAsFET) is a specialized type of field-effect transistor ( FET ) that is used in amplifier circuits at very-high, ultra-high, and microwave radio frequencies. This spans the electromagnetic radiation spectrum from approximately 30 MHz up to the infrared band. The GaAsFET is known for its sensitivity, and especially for the fact that it generates very little internal noise. This is because gallium arsenide has exceptional carrier mobility. The electron s and hole s move through the semiconductor material easily and fast. The GaAsFET is a depletion-mode device. This means that it conducts when no voltage is applied to the control electrode (gate), and when a voltage appears at the gate, the channel conductivity decreases.

In weak-signal wireless communications and broadcast reception, GaAsFET devices perform better than most other types of FET. Some types of GaAsFET are used as radio-frequency ( RF ) power amplifiers. GaAsFETs are employed in space communications, in radio astronomy, and in experiments conducted by amateur radio operators.

This was last updated in March 2011
Networking
  • remote infrastructure management

    Remote infrastructure management, or RIM, is a comprehensive approach to handling and overseeing an organization's IT ...

  • port address translation (PAT)

    Port address translation (PAT) is a type of network address translation (NAT) that maps a network's private internal IPv4 ...

  • network fabric

    'Network fabric' is a general term used to describe underlying data network infrastructure as a whole.

Security
CIO
  • digital innovation

    Digital innovation is the adoption of modern digital technologies by a business.

  • business goals

    A business goal is an endpoint, accomplishment or target an organization wants to achieve in the short term or long term.

  • vertical SaaS (software as a service)

    Vertical SaaS describes a type of software as a service solution created for a specific industry, such as retail, financial ...

HRSoftware
  • employee onboarding and offboarding

    Employee onboarding involves all the steps needed to get a new employee successfully deployed and productive, while offboarding ...

  • skill-based learning

    Skill-based learning develops students through hands-on practice and real-world application.

  • gamification

    Gamification is a strategy that integrates entertaining and immersive gaming elements into nongame contexts to enhance engagement...

Customer Experience
  • Microsoft Dynamics 365

    Dynamics 365 is a cloud-based portfolio of business applications from Microsoft that are designed to help organizations improve ...

  • Salesforce Commerce Cloud

    Salesforce Commerce Cloud is a cloud-based suite of products that enable e-commerce businesses to set up e-commerce sites, drive ...

  • Salesforce DX

    Salesforce DX, or SFDX, is a set of software development tools that lets developers build, test and ship many kinds of ...

Close