Title:
赤外線検出装置
Document Type and Number:
Japanese Patent JP5895232
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an infrared detection apparatus which is capable of suppressing influences of an unwanted low frequency component without reducing an S/N ratio of a current/voltage conversion circuit.SOLUTION: An infrared detection apparatus 1 comprises a correction circuit 6 which reduces an unwanted component that is a low frequency component equal to or lower than a predetermined frequency from input of a quantizer 42 in an A/D conversion section 4. The correction section 6 feeds back the unwanted component from output of a first filter section 51 constituting a part of a digital filter 5 to a non-inverted input terminal of an operational amplifier 412 in an integrator 41 constituting a part of the A/D conversion section 4. Since an input signal from a current/voltage conversion circuit 3 is inputted to an inverted input terminal of the operational amplifier 412, a signal obtained by removing the unwanted component from the input signal is inputted to the quantizer 42. Therefore, an input signal of the A/D conversion section 4 is avoided from exceeding an input allowable range because of influences of the unwanted component.
Inventors:
Taku Fukui
Mitsuteru Hataya
Mitsuteru Hataya
Application Number:
JP2011093447A
Publication Date:
March 30, 2016
Filing Date:
April 19, 2011
Export Citation:
Assignee:
Panasonic IP Management Co., Ltd.
International Classes:
G01J1/42; G01J1/02; G01J1/44; H01L37/00
Domestic Patent References:
| JP6094522A | ||||
| JP7332982A | ||||
| JP6222159A | ||||
| JP3259425A | ||||
| JP64020418A | ||||
| JP9119864A | ||||
| JP5055641A | ||||
| JP2003227753A |
Foreign References:
| US7230555 |
Attorney, Agent or Firm:
Keisei Nishikawa