Question

Which among the following is preferred to display device in digital application?

(a) Matched zener diode

(b) Matched LEDs

(c) Matched rectifier diode

(d) All of the mentioned

This question was posed to me by my school principal while I was bunking the class.

The above asked question is from Voltage to Current Converter with Floating and Grounded Load in chapter Operational Amplifier Applications of Linear Integrated Circuits

Answer 1

The correct answer is:

(b) Matched LEDs

Explanation:

In digital applications, matched LEDs are preferred as display devices for the following reasons:

1. Brightness Consistency: Matched LEDs ensure uniform brightness, which is essential for clear and accurate digital displays.
2. Low Power Consumption: LEDs are efficient and consume less power, making them ideal for digital circuits.
3. Fast Response Time: LEDs have quick switching characteristics, which are beneficial for real-time digital displays.
4. Reliability and Longevity: LEDs are durable and have a long operational life.

Other options:

• Matched zener diodes and rectifier diodes are not typically used for display purposes in digital applications as they are designed for voltage regulation or rectification rather than visual representation.