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Measuring adjustable controller. RU patent 2293435.

Measuring adjustable controller. RU patent 2293435.

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

 


 

IPC classes for russian patent Measuring adjustable controller. RU patent 2293435. (RU 2293435):

H03G3/02 - Manually-operated control
Another patents in same IPC classes:
Measuring adjustable controller 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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