A 4 BCD code is a 4 decimal-digit BCD code, thus a 16 digit binary-code.
You take the decimal number 3545. It's BCD code is 0011 0101 0100 0101 where every 4 bits represent a decimal digit.
BCD code isn't valid for these integers , 10 , 11 , 12 , 13 , 14 i.e if these integers ae converted to binary code they 'd be called wrong BCD
0100 0111 4 7
i dont know 1001+1001 - Constructing a BCD-to-excess-3-code converter with a 4-bitt adder we know that the excess-3 code digit is obtained by adding three to the corresponding BCD digit. To change the circuit to an excess-3-to-BCD-code converter we feed BCD-code to the 4-bit adder as the first operand. Then feed constant 3 as the second operand. The output is the corresponding excess-3 code. To make it a BCD to excess-3 converter, we feed the 2's complement of 3 as the second operand. - Constructing a BCD-to-excess-3-code converter with a 4-bitt adder we know that the excess-3 code digit is obtained by adding three to the corresponding BCD digit. To change the circuit to an excess-3-to-BCD-code converter we feed BCD-code to the 4-bit adder as the first operand. Then feed constant 3 as the second operand. The output is the corresponding excess-3 code. To make it a BCD to excess-3 converter, we feed the 2's complement of 3 as the second operand.
I will answer this by example: BCD is unweighted code, XS3 is weighted by 3 code. 0 in BCD 0000, XS3 0011 1 in BCD 0001, XS3 0100 2 in BCD 0010, XS3 0101 3 in BCD 0011, XS3 0110 4 in BCD 0100, XS3 0111 5 in BCD 0101, XS3 1000 6 in BCD 0110, XS3 1001 7 in BCD 0111, XS3 1010 8 in BCD 1000, XS3 1011 9 in BCD 1001, XS3 1100
Design a BCD to Excess-5 code coverter
4 full adders will be used BCD is a 4 bit code. Each bit of the BCD number will be an input of each full adder. input 1 in first FA. 1 in second and 0 in the last to FA's
we converter BCD to EXCeSS-3 is first rule 2 4 2 1 and other third number of BCD add other BCd as 0 to 15 Type your answer here...
tryeytryey
detects the invalid portion of the bcd number codes (1010-1111)
BCD-BinaryCodedDecimal->Binary equivalent of each decimalexpressed using 4 bits->For single digit decimal BCD is same as its binary.In BCD only first 10 binary numbers are valid.The remaining 5 are invalid. Gray code is an unweighed code. ex: G3=B3 G2=G3 XOR B2 G1=G2 XOR B1 G0=G1 XOR B0
Either buy a 4 bit BCD counter chip, or strap a 4 bit ripple counter chip into BCD mode, or build 4 Eccles-Jordan flipflops, hook them up as a ripple counter, and strap it into BCD mode.
Exam paper question.