| 摘要 |
PROBLEM TO BE SOLVED: To provide an analog division device which has small circuit scale, and high resolution. SOLUTION: A divisor signal V1 is voltage-divided into four by a voltage division circuit 20. At first, a voltage division feedback signal is reset, and the amplification factor of a dividend amplification circuit 24 is set as "1", and a dividend changeover switch 21 is switched, and a dividend signal V2 is input to comparators 26 to 28 as a dividend amplification signal as it is, and compared with each voltage division signal. As a result, the division result of the first place of decimal in quaternary is acquired (the first unit division operation). Then, the maximum value of voltage-division signals which are smaller than the current dividend amplification signal is defined as a voltage-division feedback signal, and the voltage-division feedback signal is subtracted from the current dividend amplification signal by a subtractor 22, and the subtraction result is amplified by an amplification factor "4". The amplified signal is input to the comparators 26 to 28 as a new dividend amplification signal, and compared with each voltage division signal. As a result, the arithmetic result of the second place of decimal is acquired (the second unit division operation). Afterwards, the unit division operation is repeated the predetermined number of times in the same way. COPYRIGHT: (C)2008,JPO&INPIT |
