| 摘要 |
A peak selection circuit connectible to receive several variable amplitude signals for selecting the signal of greatest amplitude and indicating which channel provided such signal. This peak selection circuit can be used, for example, in an apparatus for detecting a gas at first and second locations which comprises a first sensor for providing a first electrical signal having a characteristic variable in accordance with the concentration of the gas at the first location, a second sensor for providing a second electrical signal having a characteristic variable in accordance with the concentration of the gas at the second location, a circuit coupled to the first and second sensors for automatically selecting the signal having the characteristic indicative of the greatest amount of the gas, and an indicator responsive to the selected signal for providing an indication as to which of the signals was selected by the circuit.
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