Flash type analog-to-digital converter

A flash type analog-to-digital converter for generating a plurality of reference voltages different in increments of predetermined voltage steps, comparing the related plurality of reference voltages and an analog input signal in voltage in parallel to detect the voltage level of the analog input signal, and converting the same to a digital code of predetermined bits, comprising:

• a first encoder for encoding most significant n bits of the predetermined bits N and outputting a Gray code;
• a second encoder for encoding the remaining bit among the predetermined bits N and outputting the same;
• a first output circuit for converting the Gray code output from the first encoder to a binary code and creating n bit of digital code;
• and
• a second output circuit for generating the remaining bit of the digital code except the n bits from the predetermined bits N by using the digital code generated by the related first output circuit and the output of the second encoder.

A flash type analog-to-digital converter comprising:

• a plurality of comparators and a resistor string, said plurality of comparators being (2N−1) comparators, “N” being the number of predetermined bits for said flash type analog-to-digital converter, said plurality of comparators generating at least one most significant bit,
• a comparator of said plurality of comparators having a comparator input, said comparator input being electrically connected to said resistor string,
• said resistor string generating a plurality of reference voltages, a reference voltage of said plurality of reference voltages being applied to said comparator input,
• said total number of bits having at least one most significant bit, said resistor string being folded a number of times, said number of times corresponding to a number n of most significant bits of said at least one most significant bit.

A flash type analog-to-digital converter comprising:

• a first encoder, a second encoder, a first output circuit and a second output circuit,
• said first encoder outputting at least one most significant bit predetermined bits N, “N” being the number of predetermined bits for said flash type analog-to-digital converter,
• said second encoder outputting at least one least significant bit of said predetermined bits,
• said first output circuit converting said at least one most significant bit into one code,
• said second output circuit converting said at least one least significant bit into another code, said another code different from said one code.