Which circuit is commonly used to drive a seven-segment display?a.Decoderb.Parity generatorc.Multiplexerd.Encoder

The circuit commonly used to drive a seven-segment display is a Decoder.

Here's a step-by-step explanation:

1. A seven-segment display is a form of electronic display device for displaying decimal numerals. It is an integration of 8 LEDs (7 segment + 1 dot) that are connected in such a way that it can display any number between 0-9 and some characters like A, b, C, d, E, F, etc.

2. Each LED is controlled by a single pin - so to control all the seven segments, it requires 7 pins and to control the dot, it requires another pin.

3. To reduce the number of pins, we use a Decoder circuit. A Decoder is a combinational circuit that converts binary information from n input lines to a maximum of 2^n unique output lines.

4. In the case of a seven-segment display, a BCD to 7-segment decoder circuit is typically used. BCD stands for Binary-Coded Decimal. This type of decoder takes the BCD code as input and outputs the relevant control signals for the seven-segment display.

5. The BCD to 7-segment decoder takes 4 input lines and has 7 output lines (one for each LED segment). The decoder turns on the LEDs corresponding to the correct number upon receiving a binary number input.

6. Therefore, a Decoder is the circuit commonly used to drive a seven-segment display.