Differential mode input voltage the electronic circuit null differential mode input voltage which is converted to single

摘要

PROBLEM TO BE SOLVED: To allow a circuit to use a calculating amplifier having a low common mode rejection ratio(CMRR) and to use a converter suitable for a low voltage application. ;SOLUTION: A differential-single end converter 200 is made up of a resistance network 205 and a calculating amplifier 260. A resistor 250 is arranged between a noninverted input 264 of the calculating amplifier 260 and a negative input terminal 202 of the converter 200 in comparison with a conventional converter employing a conventional technology. A common mode voltage V_nii' at the noninverted input 264 does not depend on a differential input voltage V_in# of the converter 200 to have a small fluctuation. Thus, the circuit uses the calculating amplifier 260 having a low CMRR and the converter 200 is suitable for a low voltage application.;COPYRIGHT: (C)1998,JPO