Patent ID: 7013725

Claim:
A hot-wire anemometer, comprising: a bridge circuit including a hot-wire resistor, first and second input terminals, and first and second output terminals, the hot-wire resistor having a resistance dependent at least in part on an airflow past the hot-wire resistor; a first operational amplifier coupled to the first and second output terminals of the bridge circuit, the first operational amplifier operable to generate an output signal in response to a voltage differential across the first and second output terminals of the bridge circuit; a second operational amplifier operable to generate an output signal in response to the output signal of the first operational amplifier and to a discontinuous time control signal; a switching mechanism operable to cycle a supply voltage to the first input terminal of the bridge circuit in response to output signal of the second operational amplifier such that the supply voltage is intermittently connected to the first input terminal of the bridge circuit; and an inductor module coupling the switching mechanism to the first input terminal of the bridge circuit operable to low-pass filter an output voltage of the bridge circuit.