TWO-TERMINAL DEVICE PARAMETER BRIDGE METER Russian patent published in 2014 - IPC G01R17/00 

FIELD: instrumentation.

SUBSTANCE: this bridge meter comprises feed pulse generator with voltage variation during their duration with tⁿ, where n at separate equalisation takes on values of 0, 1, 2, and 3, bridge circuit and zero-indicator. Said bridge circuit comprises two-terminal device with balanced resistors that make the bridge circuit second branch. Also, it comprises extra capacitor and two extra resistors. Note here that all extra elements are interconnected in series. Free terminal of capacitor is connected with pulse generator output. Free terminal of second resistor is grounded while bridge second branch second capacitor is connected to common terminal of extra resistors. Common terminal of 3^rd, 4^th, and 5^th resistors of bridge second branch make the bridge circuit output 2^nd terminal. This terminal is connected with differential input of zero-indicator. Second, fourth and both extra resistors are adjustable. Functional elements make target parameters, that is, first and second resistances of resistors and first and second capacitance of capacitors.

EFFECT: higher precision.

1 dwg