Analog-to-digital converter
AssigneeSanyo Electric Co., Ltd.
InventorShigeto Kobayashi
Life of this patent
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Abstract
An A-D converter includes a group of resistors, a group of comparators, an encoder and an output unit. The output unit includes a correction circuit. An inverter constitutes the correction circuit. The encoder is shared in a case where the A-D converter converts an inputted analog signal to a two-bit binary code and a case where the A-D converter converts the inputted analog signal to a 4-bit binary code. The correction circuit corrects the output of the encoder when the A-D converter is to convert the inputted analog signal to the 2-bit binary code.
Claims5
An analog-to-digital converter, which converts an input analog signal to a digital value of a predetermined number of bits, the analog-to-digital converter comprising:
- a plurality of comparators which each compares the input analog signal with a predetermined reference voltage;
- an encoder which converts outputs of the plurality of comparators to digital values;
- and
- a correction circuit which corrects an output of said encoder, if necessary, according to a condition under which said analog-to-digital converter is used.
An analog-to-digital converter, which converts an input analog signal to a digital value of a first number of bits, the analog-to-digital converter comprising:
- a plurality of comparators, arranged in parallel, which each compares the input analog signal with a predetermined reference voltage wherein the number of comparators is determined based on the first number of bits;
- an encoder which converts outputs of the plurality of comparators to digital values of the first number of bits;
- and
- an output unit which outputs the digital values converted by said encoder,
- wherein when said analog-to-digital converter is to convert the input analog signal to a digital value of a second number of bits which is less than the first number of bits, said output unit corrects the digital value converted by said encoder to the digital value of the second number of bits that said analog-to-digital converter is to generate.
An analog-to-digital converter, comprising:
- a plurality of comparators which each compares an input analog signal with a predetermined reference voltage;
- an encoder which converts outputs of the plurality of comparators to digital values wherein said encoder is configured in response to a case where the analog signal and the predetermined reference voltage are inputted to the plurality of comparators, respectively, under a first scheme;
- and
- a correction circuit which corrects the digital values converted by said encoder, in a case where the analog signal and the predetermined reference voltage are inputted to the plurality of comparators, respectively, under a second scheme that differs from the first scheme.
Dependencies are inferred from the claim text.