Discrete semiconductor devices key terms

MOSFET

MOSFET is a precise MOSFET term in AQA A-Level Physics electronics. A type of field-effect transistor used to control electrical power. When using this term, connect it to the input condition, the relevant component or circuit response, and the output signal, measurement, graph feature, or control effect. This makes the definition curriculum-specific and prevents it becoming a generic electronics phrase.

Gate terminal

The terminal of a MOSFET that receives the input signal to control the flow of current between the source and drain terminals.

MOSFET

A type of transistor used for switching or amplifying electronic signals in electronic devices.

Switching Behaviour

The characteristic response of a MOSFET to changes in gate voltage, allowing it to control the flow of current in a circuit.

transfer characteristics

The graphical representation showing the relationship between the output current and input voltage of a MOSFET, indicating its operational regions.

MOSFET

A type of field-effect transistor used to amplify or switch electronic signals, characterized by its three terminals: gate, drain, and source.

MOSFET

MOSFET is a precise MOSFET term in AQA A-Level Physics electronics. A type of transistor used to switch or amplify electronic signals in control circuits. When using this term, connect it to the input condition, the relevant component or circuit response, and the output signal, measurement, graph feature, or control effect. This makes the definition curriculum-specific and prevents it becoming a generic electronics phrase.

Zener diode

A diode that allows current to flow in the reverse direction when a specific reverse voltage is reached, used for voltage regulation.

Zener diode

A semiconductor device that allows current to flow in the reverse direction when a specific reverse voltage, known as the Zener breakdown voltage, is reached.

reverse breakdown

The condition in which a Zener diode conducts in reverse, allowing current to flow while maintaining a constant voltage across its terminals.

Zener diode

A semiconductor device that allows current to flow in the reverse direction when a specific reverse voltage, known as the Zener breakdown voltage, is reached.

voltage reference

A stable voltage output provided by a Zener diode used to maintain a constant voltage level in electronic circuits.

Zener diode

A semiconductor device that allows current to flow in the reverse direction when a specific reverse voltage is reached, used for voltage regulation.

voltage regulator

A circuit that maintains a constant output voltage despite variations in input voltage or load conditions, often utilizing Zener diodes.

Zener diode

A semiconductor device that allows current to flow in the forward direction like a regular diode, but also permits reverse current when the voltage exceeds a certain level, known as the Zener breakdown voltage.

Ordinary diode

A semiconductor device that allows current to flow in one direction only, blocking reverse current, and is used primarily for rectification in circuits.

Photodiode

A semiconductor device that converts light into an electrical current, operating by the principle of the photoelectric effect.

Photocurrent

The electric current generated in a photodiode when it is exposed to light, which is proportional to the intensity of the incident light.

Photocurrent

The electric current generated in a photodiode when it is exposed to light, which is proportional to the intensity of the incident light.

Light Intensity

The amount of light energy that strikes a surface per unit area, typically measured in watts per square meter (W/m²), affecting the photocurrent in photodiodes.

Photodiode I-V characteristics

The relationship between the current and voltage in a photodiode, showing how the current changes with varying voltage under light exposure.

Photocurrent

The electric current generated in a photodiode when it is exposed to light, which is proportional to the intensity of the incident light.

Photodiode

A semiconductor device that converts light into an electrical current, operating based on the photoelectric effect.

Sensing circuit

An electronic circuit designed to detect changes in physical phenomena and produce a corresponding output signal.

Hall effect

The Hall effect occurs when a magnetic field is applied perpendicular to the flow of current in a conductor, causing a voltage difference (Hall voltage) to develop across the conductor.

Hall voltage

Hall voltage is the voltage generated across a conductor when it carries current in the presence of a magnetic field, which is proportional to the strength of the magnetic field and the amount of current flowing.

Hall voltage

The voltage developed across a conductor when it is placed in a magnetic field, proportional to the magnetic field strength and the current flowing through the conductor.

Magnetic field strength

A measure of the intensity of a magnetic field, typically measured in teslas (T), which influences the Hall voltage in a current-carrying conductor.

Hall effect

The Hall effect occurs when a magnetic field is applied perpendicular to the flow of current in a conductor, causing a voltage difference (Hall voltage) to develop across the conductor.

Hall voltage

Hall voltage is the voltage generated across a conductor when it carries current in the presence of a magnetic field, which can be used to measure magnetic field strength.