New Low Temperature-sensitive and Electronically Controllable Configurations for the Measurement of Small Resistance Changes

This article proposes two topologies of voltage-mode and current-mode improved Wheatstone bridges. The features of the propose configurations are that: they can control magnitude of output signals via the input bias current; the proposed circuits are low temperature sensitive, the circuit descriptions are very simple. The circuit performances are depicted trough PSPICE simulations, they show good agreement to theoretical anticipation and provide ability to measure small resistance changes at a wide range of frequencies (more than 30MHz). The power consumption is approximately 2.38mW and 1.13mW for voltage-mode and current-mode, respectively, at ±1.5V supply voltages