Glossary

Volt-second(s)

Voltage-to-frequency

Volt ampere(s)

A varistor is an electronic component with an electrical resistance that varies with the applied voltage. Also known as a voltage-dependent resistor (VDR), it has a nonlinear, non-ohmic current–voltage characteristic that is similar to that of a diode.

The supply voltage for a circuit is often given as V plus a double-letter suffix. The double letter is usually related to the lead of the transistors that are commonly connected to that supply or to a resistor that connects to that supply.

Voltage-Controlled Oscillator: An oscillator device in which output frequency is proportional to its input voltage.

Voltage Controlled, Temperature Compensated Crystal Oscillator: A TCXO which offers the ability to control the oscillation frequency with an analog voltage

Voltage Controlled Crystal Oscillator: An oscillator that uses a crystal to establish its frequency but will vary its frequency as an analog control voltage varies.

Very High Data-Rate Digital Subscriber Line: A method for delivering high-speed digital services on the standard twisted pair used for voice phone lines. VDSH operates at data rates from 12.9Mbps to 52.8Mbps.

Variable-frequency oscillator

Variable-gain amplifier

Very-low frequency

Very-low intermediate frequency

Very large-scale integration (VLSI) refers to an IC or technology with many devices on one chip. The question, of course, is how one defines "many."

VERSAmodule Eurocard, or VMEBus, a microcomputer bus. Standardized in IEC 821, IEEE 1014-1987 and ANSI/VITA 1-1994.

Voice over Internet Protocol: Method for transmission of voice (or fax) calls over the Internet.

Volt (or Volts): Unit of measure for electromotive force (EMF), the electrical potential between two points. An electrical potential of 1 volt will push 1 ampere of current through a 1-ohm resistive load.

A volt-ampere (VA) is the voltage times the current feeding an electrical load. A kilovolt-ampere (kVA) is 1000 volt-amperes.

Voltage, electric potential difference, electric pressure or electric tension (formally denoted ?V or ?U, but more often simply as V or U, for instance in the context of Ohm's or Kirchhoff's circuit laws) is the difference in electric potential between tw

A capacitor charge pump circuit which produces an output voltage which is twice the input voltage.

Voltage Identification Digital, or VID, is a circuit concept developed to provide the central processing unit (CPU) of a computer with the appropriate supply voltage. Instead of having a power supply unit generate some fixed voltage, the CPU uses a small

A circuit which is connected between the power source and a load, which provides a constant voltage despite variations in input voltage or output load.

A voltage regulator is an electronic circuit that provides a stable DC voltage independent of the load current, temperature and AC line voltage variations. 

Volt-Ohm meter

Peak-to-peak voltage

VPU is a symbol for the pull-up voltage specification (or "Pullup Supply Voltage").

Voltage Regulator Down, an Intel standard for voltage regulators which are "down" on the mother board.

Voltage Regulator Module: An Intel Standard for switching regulator modules.

VCO_SEL (control bit)

Virtual Socket Interface Alliance

VSWR (Voltage Standing Wave Ratio), is a measure of how efficiently radio-frequency power is transmitted from a power source, through a transmission line, into a load (for example, from a power amplifier through a transmission line, to an antenna).