MICROCONTROLLER METERING CONVERTER WITH BALANCING OF RESISTIVE BRIDGE Russian patent published in 2014 - IPC G01R27/02 

FIELD: measurement equipment.

SUBSTANCE: invention relates to the measurement technology, in particular to devices for measuring the resistance, and can be used in the media for the measurement and control of non-electrical quantities by resistive sensors. A microcontroller transmitter with a trim resistor bridge comprises the first resistor 1, the second resistor 2 (referred to as the RTD), the third resistor 3, the fourth resistor 4, the fifth resistor, an RC- filter 6 and a microcontroller 7. The resistors 1, 2 and 5 by the first pin are connected to an input RC- filter 6, whose output is connected to the first entry AA (AK not shown ) of the microcontroller 7, the second terminal of the resistor 5 is connected to the PWM output (PWM not shown) of the microcontroller 7, the first terminals of resistors 3 and 4 are connected to the second AC input of the microcontroller 7, the second terminals of the resistors 1, 2, 3 and 4 are connected respectively to the first, second, third and fourth digital outputs of the microcontroller 7.

EFFECT: improving the accuracy of the transmitter microcontroller.

2 cl, 1 dwg