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1.发明公开
公开(公告)号：EP2425229A2
公开(公告)日：2012-03-07
申请号：EP10722567.4
申请日：2010-04-14
CPC分类号： G01N21/39 , G01J1/42 , G01J1/4257 , G01N21/274 , G01N21/3504 , G01N21/61 , G01N21/8507 , G01N2021/399 , G01N2201/0612 , G01N2201/0691 , G01N2201/121 , G01N2201/1245 , G01N2201/12753
摘要： The invention relates to an actuation and evaluation circuit for a laser diode (1) and a photodiode (3) for determining the concentration of a gas. The laser diode can generate light in the range of an absorption line of the gas. The circuit comprises a driver (10, 11, 12, 13) for generating a driver signal (17) for the laser diode (1), an assembly (8, 9) for generating a reference signal (20), and a subtractor (5) for subtracting the reference signal (20) from the signal (21) supplied by the photodiode. The invention further relates to a measuring device for determining the concentration of a gas by way of such an actuation and evaluation circuit. Finally, the invention relates to a corresponding method.
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2.发明授权
公开(公告)号：EP2425229B1
公开(公告)日：2016-08-31
申请号：EP10722567.4
申请日：2010-04-14
CPC分类号： G01N21/39 , G01J1/42 , G01J1/4257 , G01N21/274 , G01N21/3504 , G01N21/61 , G01N21/8507 , G01N2021/399 , G01N2201/0612 , G01N2201/0691 , G01N2201/121 , G01N2201/1245 , G01N2201/12753
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