Abstract
A novel current-mode signal conditioning circuit topology for thermal flow sensors using the hot-wire anemometer technique is proposed. A second-generation current conveyor is used to implement a highly linear output-voltage versus resistance-variation converter due to the gas flow. After exploring the capabilities of a simple constant-current version, a current-feedback constant temperature version with linear behavior is also indroduced. The circuit configuration is simpler than its voltage-mode counterpart based on a Wheatstone bridge topology with op-amps and features higher performance in terms of circuit size, simplicity, linearity, and overall power consumption
Published Version
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