| 摘要 |
FIELD: radio equipment for analog transformation of signals in systems of automatics, devices, sensors, and also in pressure transformers with resistive strain-sensitive bridge. ^ SUBSTANCE: amplifier contains operational amplifiers 10,11, resistive divider of voltage of resistors 1-4, element 9 with adjustable resistance (potentiometer) and resistors 5-8, for achievement of first goal second outputs of element 9 and resistor 6 are connected to inverting input of operational amplifier 10, second output of resistor 5 is connected to third branch of resistive divider. First and second branches of resistive divider are connected in equal resistors 7 and 8 respectively to outputs of second differential input (low-ohm), onto which second input signal (non-controllable) may be sent from source of supporting voltage for uncontrolled shift of original output signal of amplifier, which is required in transformers of pressure to standard current signal of 4-20 mA. ^ EFFECT: increased linearity of dependency of amplifier amplification coefficient on resistance of adjusted element, in particular potentiometer. ^ 2 cl, 1 dwg |
