Which system control converts stored numbers into voltages to control brightness on the display?

Which system control converts stored numbers into voltages to control brightness on the display?

• A. Digital to analog converter
• B. Analog to digital converter
• C. Cathode ray tube
• D. Receiver

Answer: (A)

Converting stored digital brightness values into an analog voltage that drives the display brightness is the job of a digital-to-analog converter. The system keeps brightness levels as digital numbers; to produce the actual brightness, those numbers must become a voltage that changes smoothly with the input code. The DAC reads the digital word and generates a corresponding analog output voltage (or current), which the display driver uses to set pixel intensity. In contrast, an analog-to-digital converter would take an analog voltage and turn it into a digital value, not the other way around. The cathode ray tube is the display device itself, and a receiver isn’t involved in this brightness control. So the digital-to-analog converter is the component that turns stored numbers into voltages to control brightness.

Converting stored digital brightness values into an analog voltage that drives the display brightness is the job of a digital-to-analog converter. The system keeps brightness levels as digital numbers; to produce the actual brightness, those numbers must become a voltage that changes smoothly with the input code. The DAC reads the digital word and generates a corresponding analog output voltage (or current), which the display driver uses to set pixel intensity. In contrast, an analog-to-digital converter would take an analog voltage and turn it into a digital value, not the other way around. The cathode ray tube is the display device itself, and a receiver isn’t involved in this brightness control. So the digital-to-analog converter is the component that turns stored numbers into voltages to control brightness.