公开(公告)号：JP2000224484A

公开(公告)日：2000-08-11

申请号：JP2000011897

申请日：2000-01-20

Applicant: INFINEON TECHNOLOGIES CORP

Inventor： TAI-MIN CHEN

IPC: H04N5/335 ,  H04N5/353 ,  H04N5/361 ,  H04N5/365 ,  H04N5/374

Abstract: PROBLEM TO BE SOLVED: To improve read time and to cancel the fixed pattern noise of respective pixels by opening a shutter before starting exposure, starting the exposure by VSETB pulses for presetting reset to '1' and ending the exposure by closing the shutter. SOLUTION: The shutter 1012 is opened by a software 1005 on a host personal computer 1002, frame integration pulses FI are turned to a high level, VSETB and VCLRB for clearing reset and performing read are pulsed and the integration of all photocells inside an array is simultaneously started. After exposure time T1, the pulse of frame read FR is continued until FI becomes a low level, then the shutter 1012 is closed and images are read over 1014 lines and then buffered. Further, VSETB are pulsed, the fetch of the next image is started and VCLRB and FR are pulsed again. The integration is performed for the time T1, dark frames are read over 1014 frames, they are subtracted from buffered image frames and noise is canceled.

公开(公告)号：JP2001175539A

公开(公告)日：2001-06-29

申请号：JP2000339320

申请日：2000-11-07

Applicant: INFINEON TECHNOLOGIES CORP

Inventor： TAI-MIN CHEN

IPC: G06F12/14 ,  G06F1/00 ,  G06F21/22 ,  G06F21/24 ,  G11C7/24 ,  G11C16/22

Abstract: PROBLEM TO BE SOLVED: To provide a device and a method for preventing an illegal firmware copy. SOLUTION: In the firmware copy preventing device having a protected memory for storing plural access keys, a first memory position for storing a seed value, a second memory position for storing the estimate value of a first copy prevention function and a third memory position for storing the result of a second copy prevention function, the access key can not be read by system software, the first copy prevention function is the function of the seed value and the first key of the plural access keys and when the first copy prevention function is successful in comparison, the second copy prevention function is the function of the seed value and the second key of the plural access keys.