<p>The invention relates to a gas flow meter having a gas flow detection circuit (10) for detecting a current flowing through a resistor installed in a gas passage and a voltage generated across the resistor and outputting a voltage signal representing a gas flow passing through the gas passage; a noise reduction circuit (100) for reducing external noise; and a digital adjusting circuit (20) for digitally adjusting a signal representing the detected gas flow and outputting the adjusted signal; wherein a voltage signal based on the signal adjusted by the digital adjusting circuit (20) is output.</p>
