Cosa (chi) è Random Access Memory Digital-to-Analog Converter - definizione

DEVICE THAT CONVERTS A DIGITAL SIGNAL INTO AN ANALOG SIGNAL

Analog decoding; Digital to analog convertor; Digital-to-analog convertor; Digital to analog converter; Digital to analogue converter; D/A; Digital-to-analogue converter; DA-converter; D/A-converter; Digital-to-Analog Converter; D/A converter; D-a-c; Digital to analogue convertor; Digital-to-analog; Digital to analog; Digital-to-analog conversion; DA conversion; Digital-to-analog converters; D to a; D2A; Digital to Analog; D-to-A; Digital-analog conversion

Random Access Memory Digital-to-Analog Converter

<hardware> (RAMDAC) A combination of three fast DACs with a small SRAM used in graphics display adapters to store the colour palette and to generate the analog signals to drive a colour monitor. The logical colour number from the display memory is fed into the address inputs of the SRAM to select a palette entry to appear on the output of the SRAM. This entry is composed of three separate values corresponding to the three components (red, green, and blue) of the desired physical colour. Each component value is fed to a separate DAC, whose analog output goes to the monitor, and ultimately to one of its three electron guns (or equivalent in non-CRT displays). DAC word lengths range usually from 6 to 10 bits. The SRAM's wordlength is three times the DAC's word length. The SRAM acts as a colour lookup table. It usually has 256 entries (and thus an 8-bit address). If the DAC's word length is also 8 bits, we have a 256 x 24-bit SRAM which allows a selection of 256 out of 16777216 possible colours for the display. The contents of the SRAM can be changed while the display is not active (during display blanking times). The SRAM can usually be bypassed and the DACs can be fed directly by display data (for true colour modes). (1996-03-24)

Analog-to-digital converter

SYSTEM THAT CONVERTS AN ANALOG SIGNAL, SUCH AS A SOUND PICKED UP BY A MICROPHONE OR LIGHT ENTERING A DIGITAL CAMERA, INTO A DIGITAL SIGNAL; DEVICE CONVERTING A PHYSICAL QUANTITY TO A DIGITAL NUMBER

Analog to digital convertor; Analog to Digital Convertors; Analogue to digital converter; Analog to Digital converter; Analog to digital converter; A-D converter; Analog-To-Digital Converter; Analog digital conversion; Analog to digital conversion; A/D; AD converters; Analog to digital converters; Analog-to-digital conversion; Analogue-to-digital converter; AD-converter; A/D-converter; A/D converter; Analogue-digital converter; Analog-to-digital; A to D; ICL7107; Analog-to-digital convertor; Icl 7107; A-to-D; Analog-to-Digital Converter; Analog-to-Digital Conversion; Analog-digital conversion; A2D; Testing SAR ADC; ADC DAN DAC; Analog digital converter; Analog to Digital; Wilkinson analog-to-digital converter; ADC channels; Analog/digital converter; A-to-D conversion; A-to-D converter; Wilkinson ADC; AD conversion; A/D conversion; Applications of analog-to-digital converters

In electronics, an analog-to-digital converter (ADC, A/D, or A-to-D) is a system that converts an analog signal, such as a sound picked up by a microphone or light entering a digital camera, into a digital signal. An ADC may also provide an isolated measurement such as an electronic device that converts an analog input voltage or current to a digital number representing the magnitude of the voltage or current.

https://en.wikipedia.org/wiki/Analog-to-digital_converter

A/D

SYSTEM THAT CONVERTS AN ANALOG SIGNAL, SUCH AS A SOUND PICKED UP BY A MICROPHONE OR LIGHT ENTERING A DIGITAL CAMERA, INTO A DIGITAL SIGNAL; DEVICE CONVERTING A PHYSICAL QUANTITY TO A DIGITAL NUMBER

¦ abbreviation Electronics analogue to digital.

Wikipedia

Digital-to-analog converter

In electronics, a digital-to-analog converter (DAC, D/A, D2A, or D-to-A) is a system that converts a digital signal into an analog signal. An analog-to-digital converter (ADC) performs the reverse function.

There are several DAC architectures; the suitability of a DAC for a particular application is determined by figures of merit including: resolution, maximum sampling frequency and others. Digital-to-analog conversion can degrade a signal, so a DAC should be specified that has insignificant errors in terms of the application.

DACs are commonly used in music players to convert digital data streams into analog audio signals. They are also used in televisions and mobile phones to convert digital video data into analog video signals. These two applications use DACs at opposite ends of the frequency/resolution trade-off. The audio DAC is a low-frequency, high-resolution type while the video DAC is a high-frequency low- to medium-resolution type.

Due to the complexity and the need for precisely matched components, all but the most specialized DACs are implemented as integrated circuits (ICs). These typically take the form of metal–oxide–semiconductor (MOS) mixed-signal integrated circuit chips that integrate both analog and digital circuits.

Discrete DACs (circuits constructed from multiple discrete electronic components instead of a packaged IC) would typically be extremely high-speed low-resolution power-hungry types, as used in military radar systems. Very high-speed test equipment, especially sampling oscilloscopes, may also use discrete DACs.

https://en.wikipedia.org/wiki/Digital-to-analog converter