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1.Binary Coded Decimal (BCD)[Original Blog]
When discussing binary numbers, it is important to explore its different applications and variations. One such variation is the Binary Coded Decimal (BCD), which is a system that represents decimal numbers with four bits per digit. It is a widely used format in electronic systems, especially in devices that display numbers, such as calculators, clocks, and digital watches.
Here are some key features of BCD to help you understand it better:
1. Each decimal digit is represented by a four-bit binary code. For example, the decimal number 123 is represented as 0001 0010 0011 in BCD.
2. BCD is a weighted code, which means that each digit has a specific weight based on its position. The first digit has a weight of 8, the second a weight of 4, the third a weight of 2, and the fourth a weight of 1.
3. BCD is a self-correcting code. This means that if an error occurs during transmission or processing, the error can be detected and corrected.
4. BCD is not as efficient as other binary codes, as it requires more bits to represent a number. For example, the decimal number 99 would require only 7 bits in pure binary, but it requires 8 bits in BCD.
Overall, BCD is a useful system for representing decimal numbers in electronic devices. While it may not be the most efficient system, its self-correcting feature makes it a reliable choice for applications that require high accuracy.
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