Patent ID: 8466822

Claim:
An analog-to-digital conversion apparatus comprising: a first analog-to-digital converter configured to convert an input analog signal into a first digital signal; a second analog-to-digital converter configured to convert an analog signal obtained as a result of multiplying said input analog signal by a coefficient α into a second digital signal; a first computing unit configured to multiply said first digital signal output by said first analog-to-digital converter by α 2 obtained as a result of squaring said coefficient α; a second computing unit configured to multiply said second digital signal output by said second analog-to-digital converter by α −1 which is the reciprocal of said coefficient α; and a third computing unit configured to compute a difference between a first computation result output by said first computing unit and a second computation result output by said second computing unit and to output said difference as a result of analog-to-digital conversion carried out on said input analog signal.