Bolometer-type infrared imaging apparatus including a one or...

Details Bolometer-type infrared imaging apparatus including a one or... Bolometer-type infrared imaging apparatus including a one or...

2011-08-09

2011-08-09

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S208100

Reexamination Certificate

active

07994466

ABSTRACT:
Disclosed is a bolometer infrared imaging device including a plural number of readout circuits, each comprising a bias circuit that includes a bias transistor that supplies a constant voltage to a bolometer device, a bias cancellation circuit that includes a canceller transistor that removes offset current component of the bolometer device and an integrating operational amplifier that integrates the difference current between the current flowing in the bias transistor and that flowing in the canceller transistor. The bias circuit includes a source follower circuit that receives a first input voltage and supplies an output voltage to the gate of the bias transistor. The bias cancellation circuit includes a source follower circuit that receives a second input voltage and supplies an output voltage to the gate of the canceller transistor.

REFERENCES:
patent: 5756999 (1998-05-01), Parrish et al.
patent: 5952659 (1999-09-01), Yoneyama et al.
patent: 5955726 (1999-09-01), Takashima et al.
patent: 2003/0230733 (2003-12-01), Tanaka
patent: 2006/0121760 (2006-06-01), Kaneko
patent: 2006/0231760 (2006-10-01), Lee et al.
patent: 2003-318712 (2003-11-01), None
patent: 2004-020325 (2004-01-01), None

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