| 摘要 |
PURPOSE:To avoid complication of circuits even in a larger number of inputs by providing only one switch for a resistance bridge corresponding to each input voltage. CONSTITUTION:Resistance bridges are respectively connected between input terminals for introducing input voltages e1-en and a common potential terminal M. In each resistance bridge, the products of resistance values between sides opposite to each other are set equal, namely, giving a relationship or r1.r4= r2.r3. Output terminals at one end of the resistance bridges (namely, connection points between the resistance r1 and r2) are connected collectively through each one of switches T1-Tn in such a manner as to be free to turn on or off. Differential voltages DELTAV1, DELTAV2...DELTAVn between these output terminals and other output terminals (connection points between the resistance r1 and r2) are amplified with differential amplifiers A1, A2...An separately to draw output voltages V1, V2...Vn. |
