Physical quantities electric transducers temperature compensation circuit

Claim 1

A temperature compensating arrangement of electrical transducers of physical quantities with the application of resistors, strain gauges and thermistors, said arrangement comprising: at least two compensating bridge circuits; a first one of said bridge circuits having first resistor means, first potentiometer means and first thermistor means, a first control element connected across a diagonal of said first bridge circuit; voltage divider means for supplying voltage to said first bridge circuit, said voltage divider means having a resistor across said first bridge circuit; a first strain gauge connected in series with said resistor of said voltage divider means; a second strain gauge; a zeroing circuit connected to said second strain gauge, said zeroing circuit allowing zeroing of voltage difference between outputs of said first bridge circuit when a lower range value of measured physical quantity is applied allowing second bridge circuit supply current adjustment for required upper range output signal when an upper range value of measured physical quantity is applied, said second strain gauge being in said first bridge circuit; a second compensating bridge circuit having second resistor means, second potentiometer means and a second control element connected across a diagonal of said second bridge circuit; a Zener diode connected in series with a resistor for supplying voltage to said first bridge circuit; a current source connected to said first and second bridge circuits; auxiliary diode means connected between said current source and said second bridge circuit; and output potentiometer means for providing an output signal from said first bridge circuit.