RussianPatents.com
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Measuring adjustable controller. RU patent 2293435. |
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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
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Measuring adjustable controller / 2293435 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. |
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