Consequently, the time needed for single-time AD conversion corresponding to a resolution of J bits of an AD converter is obtained by voltage comparison (J=K+L) made as many as (2 raised to (K)th power plus 2) raised to (L)th power. この結果、AD変換器の分解能Jビットとしたときの1回のAD変換に要する時間は、2のK乗+2のL乗回の電圧比較(J=K+L)で得られる。 - 特許庁