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公开(公告)号：JPH11239296A
公开(公告)日：1999-08-31
申请号：JP31429098
申请日：1998-11-05
Applicant: ST MICROELECTRONICS INC
Inventor： KRAMER ALAN H , RAMBALDI ROBERTO , TARTAGNI MARCO
Abstract: PROBLEM TO BE SOLVED: To speedily and exactly identify a CMOS image array including a pixel provided with a leaky access switch by judging that the selected pixel is provided with the leaky access switch when the output of the pixel is considerably deviated from a scheduled value. SOLUTION: A read line corresponding to a pixel under testing at pressure is reset to a reset voltage and the pixel is held for a time Vtest of a prescribed length. Then, a defect analytic block 24 selects the first pixel to be evaluated. The evaluation includes the determination of an output voltage related to electric charges on that pixel. Typically, this output voltage is converted to a digital signal by an analog/digital converter 18. From this digital value, a logic block 24 determines whether that pixel has real output charges considerably smaller than the scheduled output charges or not. At such a time point, the logic block 24 determines whether than pixel has a leaky access switch or not.
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公开(公告)号：JPH11238867A
公开(公告)日：1999-08-31
申请号：JP31361598
申请日：1998-11-04
Applicant: ST MICROELECTRONICS INC
Inventor： GUERRIERI ROBERTO , BISIO MARCO , TARTAGNI MARCO
Abstract: PROBLEM TO BE SOLVED: To provide a technique for reducing a capacity of an input line of a charge amplifier. SOLUTION: A charge amplifier, which is suitably applicable to a read circuit in a solid-state image sensor is provided. The charge amplifier has a general amplifier element and a fast buffer, which drives a metal shield 218 arranged below an input line 212. The metal shield 218 follows up the voltage of the input line 212 and reduces the capacity between the input line 212 and a ground.
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公开(公告)号：JPH11316105A
公开(公告)日：1999-11-16
申请号：JP6141299
申请日：1999-03-09
Applicant: ST MICROELECTRONICS INC
Inventor： GUPTA BHUSAN , TARTAGNI MARCO , KRAMER ALAN
Abstract: PROBLEM TO BE SOLVED: To attain the measurement and integration of a small distance between a capacitive distance sensor device and an object by providing a plurality of capacitor plates for forming different capacitance values between the capacitor plates and the object. SOLUTION: A sensor device 1 is arranged so as to form arrays 3, each of which has a number of cells 2 forming a basic sensor. The device 1 has horizontal and vertical scanning stages 5, 6 for enabling one of the cells 2 according to a prescribed scanning pattern, and a feed and logic stage 7 for feeding a power of the component of the device to control the sequence of the step. The feed and logic stage 7 particularly forms a voltage feed source 12 for generating a reference voltage ΔVR. A buffer 8 is connected to the output ends of all the cells 2 to successively supply the signal present in the output end of the cell 2 enabled by the stages 5, 6. According to this, a highly precise distance measurement and integration can be attained without requiring a complicated processing of output signal.
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公开(公告)号：JPH11252464A
公开(公告)日：1999-09-17
申请号：JP31421198
申请日：1998-11-05
Applicant: ST MICROELECTRONICS INC
Inventor： RAMBALDI ROBERTO , TARTAGNI MARCO , KRAMER ALAN H
IPC: H01L27/146 , H04N5/367 , H04N5/374 , H04N5/335
Abstract: PROBLEM TO BE SOLVED: To make or correct a defective pixel just after its production and also in its life period by replacing an output of the pixel with an average of outputs of ambient pixels having no defective property and increasing or reducing an output level of the pixel at correction. SOLUTION: An analog signal 16 from separate pixels of an area sensor 12 is outputted via a line 14 and an analog-to digital converter 18 converts it into a digital signal 22. A logical block 24 decides whether or not the pixel has actual output voltage deviated drastically from the output voltage estimated by the pixel from the signal. The block 24 further classifies collapses, and when it determines that the pixel has partially collapsed, it stores that position and the collapsed type in a memory 26. After storing information about the collapsed pixel, it shifts to another pixel in the array and evaluates an output voltages a new current pixel.
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公开(公告)号：JPH11353107A
公开(公告)日：1999-12-24
申请号：JP1417899
申请日：1999-01-22
Applicant: ST MICROELECTRONICS INC
Inventor： FERRARI ALBERTO , TARTAGNI MARCO
IPC: G06F3/044 , A61B5/117 , G01B7/28 , G06F3/033 , G06F3/038 , G06F3/041 , G06F3/048 , G06K9/00 , G09G5/08 , G06F3/03
Abstract: PROBLEM TO BE SOLVED: To obtain a capacity type touch pad in which cursor/pointer screen movement can be generated by the position of a finger tip on the surface by calculating a center of gravity output signal by making the output signal of a cell for detection of a 1st array as the function of the position of the finger tip and connecting it to a resistance node of a 2nd array. SOLUTION: A two-dimensional(2D) electronic signal output i.e., the pattern of an array which encodes the contact function of a finger tip on the surface on the array is injected to a 2D pseudo resistance circuit network 301. This circuit network 301 detects the center of gravity of the inputted array output signal i.e., a 1st moment and the mass i.e., a 2nd moment. A center of gravity and a mass function are calculated at the same time by this constitution. Electrically outputting terminals 302 and 303 give an X- and a Y-directional component determining a cursor/pointer screen movement direction that a user desires, respectively. This pseudo resistance circuit network 301 can be embedded in a sensor array by using integrated circuit technology and thereby, an integrated device can be obtained.
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Patent Agency Ranking6.发明专利
公开(公告)号：JPH11248665A
公开(公告)日：1999-09-17
申请号：JP35902298
申请日：1998-12-17
Applicant: ST MICROELECTRONICS INC
Inventor： TARTAGNI MARCO , GUPTA BHUSAN
Abstract: PROBLEM TO BE SOLVED: To make detectable foreign matter on a detection surface by outputting electric signals when a dielectric constant or a field form between two buried capacitor plates changes, by means of a physical matter on a sensor detection surface. SOLUTION: A plurality of sensor arrays are provided with semiconductor capacitive sensor cells respectively arranged in M×N pieces in directions X, Y. A dielectric layer 25 on the uppermost side of the capacitive sensor cells covers capacitor plates 23, 24 while a horizontal surface 125 on the upper side of the layer 25 serves as an array surface comes into contact with a foreigh matter to be detected. When a foreign matter physically stocks onto the surface 125, it changes the dielectric constant and field from together with the plates 23, 24, dreskulting in change in the capacitance value. By performing the connection in a negative feedback style from an output end of an amplifier 17 to an input end thereof, the arrays can generate an output indicating the existence of foreign matter 18.
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公开(公告)号：JPH11220662A
公开(公告)日：1999-08-10
申请号：JP31416798
申请日：1998-11-05
Applicant: ST MICROELECTRONICS INC
Inventor： GUERRIERI ROBERTO , RAMBALDI ROBERTO , TARTAGNI MARCO
IPC: H01L27/146 , H04N5/363 , H04N5/374 , H04N5/3745 , H04N5/335
Abstract: PROBLEM TO BE SOLVED: To provide a method and device for compensating a kTC noise in the individual pixel of an array for forming a MOS image. SOLUTION: At first, a photo-diode is exposed to a reset voltage, and then a well area is cut from Vdd , and floated so that compensation can be attained. The well is floated so that a kTC charge introduced later (at the end of a reset process) can be re-distributed, and therefore, most of this is stored on a capacitor between the well and a substrate. Afterwards, the well is clamped to the Vdd again, and the noise stored in the capacitor between the well and the substrate is offset. This device is provided with an array constituted of plural pixels, and each pixel is provided with each well. Moreover, access to the power supply source (Vdd ) should be switchable. Therefore, a transistor is provided at the connecting part of each pixel.
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公开(公告)号：DE69921712D1
公开(公告)日：2004-12-16
申请号：DE69921712
申请日：1999-03-05
Applicant: ST MICROELECTRONICS INC
Inventor： TARTAGNI MARCO , GUPTA BHUSAN , KRAMER ALAN
Abstract: A distance sensor has a capacitive element in turn having a first capacitor plate which is positioned facing a second capacitor plate whose distance is to be measured. In the case of fingerprinting, the second capacitor plate is defined directly by the skin surface of the finger being printed. The sensor comprises an inverting amplifier, between the input and output of which the capacitive element is connected to form a negative feedback branch. By supplying an electric charge step to the input of the inverting amplifier, a voltage step directly proportional to the distance being measured is obtained at the output.
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公开(公告)号：DE69824377D1
公开(公告)日：2004-07-15
申请号：DE69824377
申请日：1998-11-06
Applicant: ST MICROELECTRONICS INC
Inventor： TARTAGNI MARCO , GUPTA BHUSAN
IPC: G01V3/00 , G01B7/004 , G01N27/22 , G01B101/50
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公开(公告)号：DE69930774D1
公开(公告)日：2006-05-24
申请号：DE69930774
申请日：1999-01-20
Applicant: ST MICROELECTRONICS INC
Inventor： FERRARI ALBERTO , TARTAGNI MARCO
IPC: G06F3/044 , A61B5/117 , G01B7/28 , G06F3/033 , G06F3/038 , G06F3/041 , G06F3/048 , G06K9/00 , G09G5/08
Abstract: A plurality N of capacitance sensing cells are arranged in a row/column array top to cooperate with a fingertip and produce an output signal that controls the movement of a cursor/pointer across a display screen. The output of each individual sensing cell is connected to the corresponding individual node of a resistor array that has N nodes arranged in a similar row/column array. A centroid output of the resistor nodes in row configuration provides an output signal for control of cursor movement in a row direction. A centroid output of the resistor nodes in column configuration provides an output signal for control of cursor movement in an orthogonal column direction. A mass signal output of the row/column resistor mode array provides a switch on/off signal.
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