An electronic odor sensor includes first and second amplifiers, a biasing network, and a device connected to receive the output signals from the first and second amplifiers. The device is configured to correlate the received output signals to the presence or absence of an odor. The first and second amplifiers...http://www.google.fr/patents/US6575013?utm_source=gb-gplus-shareBrevet US6575013 - Electronic odor sensor
