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
| Title | Year | Author | Number |
|---|---|---|---|
| CONTROLLABLE MEASURING AMPLIFIER | 0 |
|
SU1646046A1 |
| RESISTANCE-TO-VOLTAGE CONVERTER | 2009 |
|
RU2397500C1 |
| RESISTANCE TRANSDUCER AND THERMAL ELECTROMOTIVE FORCE IN TENSE | 2015 |
|
RU2612200C1 |
| BRIDGE CIRCUIT IMBALANCE VOLTAGE CONVERTER TO FREQUENCY OR DUTY RATIO | 2018 |
|
RU2699303C1 |
| MEASURING AMPLIFIER | 0 |
|
SU902212A1 |
| CONVERTER OF PRESSURE TO ELECTRIC SIGNAL | 1995 |
|
RU2082129C1 |
| SOURCE OF POWER | 2020 |
|
RU2746273C1 |
| RESISTANCE-TO-VOLTAGE CHANGER | 1990 |
|
RU2028630C1 |
| CONTROLLED SOURCE OF CURRENT FOR GROUNDED LOAD | 2014 |
|
RU2549252C1 |
| TEMPERATURE MEASURING DEVICE | 0 |
|
SU1739212A2 |
