CIRCUIT TO PROCESS SIGNAL FROM STRAIN-GAUGE TRANSDUCER TO SERIAL CODE Russian patent published in 2004 - IPC

FIELD: electric measurement technology. SUBSTANCE: circuit to process signal from strain-gauge transducer has two resistors 4 in bridge connection with strain-gauge transducer, measuring amplifier 26 which output is connected to input of analog-to-digital computer 29, zero drift correction circuit 3 comprising keys 5, 6 , 22, amplifiers 18, 19, 21, one of them being coupled through key 22 and resistor 23 to capacitor 24 and to voltage follower 25 which output is connected to input of measuring amplifier 26. Voltage from two resistors 4 is fed to input of operational amplifier 9 of measuring amplifier 28 and to input of key 5, voltage from strain-gauge transducer goes to input of key 6 which output is connected to output of key 5 and input of operational amplifier 10 of measuring amplifier 26. Correction pulses are fed to control inputs of keys 5 and 22 and to control input of key 6 through inverter 7. Circuit also incorporates generator 32, counter 33, decoder 34, 4AND gate 35 which can change length of correction pulses. EFFECT: raised processing accuracy. 2 dwg