Gray code generator

A gray code generator comprising:

• a counter configured to generate digital bits by performing a counting operation in response to a clock signal, the digital bits including a first digital bit, a second digital bit, a third digital bit and a fourth digital bit;
• and
• a converter configured to convert the digital bits to gray bits, the gray bits including a first gray bit, a second gray bit, a third gray bit and a fourth gray bit, the converter including,
• a plurality of converter flip-flops including a first converter flip-flop, a second converter flip-flop and a third converter flip-flop, the plurality of converter flip-flops configured to convert respective ones of the first digital bit, the second digital bit and the third digital bit to respective ones of the first gray bit, the second gray bit and the third gray bit;
• and
• a replica converter flip-flop configured to convert the fourth digital bit to the fourth gray bit.

A gray code generator comprising:

• a counter configured to generate digital bits by performing a counting operation in response to a clock signal, the digital bits including a first digital bit, a second digital bit, a third digital bit and a fourth digital bit;
• the counter including,
• a first counter flip-flop configured to generate the second digital bit, in response to the clock signal;
• a second counter flip-flop configured to output a high level as the third digital bit in response to the clock signal when a second inverted digital bit corresponding to an inverted version of the second digital bit is different from a third inverted digital bit corresponding to an inverted version of the third digital bit;
• and
• a third counter flip-flop configured to output the high level as the fourth digital bit in response to the clock signal when a result of performing a NOR operation on the second inverted digital bit and the third inverted digital bit is same as a fourth inverted digital bit, the fourth inverted digital bit corresponding to an inverted version of the fourth digital bit;
• and
• a converter configured to convert the digital bits to gray bits, the converter including a first converter flip-flop, a second converter flip-flop and a third converter flip-flop configured to convert respective ones of the first digital bit, the second digital bit and the third digital bit to respective ones of a first gray bit, a second gray bit and a third gray bit included in the gray bits.