Patent ID: 7797982

Claim:
An electronic breath analyzer comprising: a gas sensor for alcohol detection, the gas sensor having a heater and a gas sensing element; a micro controller including a general control output, a reference value input and a gas sensing element input, the gas sensing element input being coupled to the gas sensing element, the micro controller being adapted to provide an initiate reading and comprising signal at the general control output; a reference value register having a reference value pre-stored in the register, and having a read initiate input and reference value output; a general control module having a control input, a read register output, and an enable gas sensor output, the control input coupled to the general control output, the read register output coupled to the read initiate input and providing a read initiate signal upon receiving the initiate reading and comparison signal from the micro controller, the enable gas sensor output being coupled to the gas sensor and producing an enable signal upon receiving the initiate reading and comparison signal from the micro controller; wherein the gas sensor includes a resistor R 5 coupled between the gas sensing element and the enable gas sensor output of the general control module, and the reference value register includes a memory device having the read initiate input and the reference value output, and the general control module includes a transistor having a base which provides the control input, and an emitter coupled to a VCC voltage and a collector coupled to a VCC power input of the register and to the enable gas sensor output.