PROCEDURE DETERMINING VERY LOW CAPACITANCE AND ITS APPLICATION
FIELD: surface sensors for capacitive measurements, specifically, sensors of finger prints. SUBSTANCE: raster of capacitor plates is connected to reading and excitation conductors. Reading conductors LL. are connected in alteration to output of operational amplifier with feedback and to reservoir ca...
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| creator | VILLER JOZEF FON BASSE PAUL'-VERNER |
| description | FIELD: surface sensors for capacitive measurements, specifically, sensors of finger prints. SUBSTANCE: raster of capacitor plates is connected to reading and excitation conductors. Reading conductors LL. are connected in alteration to output of operational amplifier with feedback and to reservoir capacitor (Cs). Measured capacitances (Cp) are charged many times and charges are stored in reservoir capacitors. Potential across reading wires between charging cycles is maintained constant thanks to low-resistance output of operational amplifier. EFFECT: capability to evaluate jointly all reading conductors when procedure is utilized in sensor of finger prints. 3 cl, 11 dwg |
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SUBSTANCE: raster of capacitor plates is connected to reading and excitation conductors. Reading conductors LL. are connected in alteration to output of operational amplifier with feedback and to reservoir capacitor (Cs). Measured capacitances (Cp) are charged many times and charges are stored in reservoir capacitors. Potential across reading wires between charging cycles is maintained constant thanks to low-resistance output of operational amplifier. 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| subjects | CALCULATING COMPUTING COUNTING DIAGNOSIS HANDLING RECORD CARRIERS HUMAN NECESSITIES HYGIENE IDENTIFICATION IMAGE DATA PROCESSING OR GENERATION, IN GENERAL MEASURING MEASURING ANGLES MEASURING AREAS MEASURING ELECTRIC VARIABLES MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS MEASURING MAGNETIC VARIABLES MEDICAL OR VETERINARY SCIENCE PHYSICS PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS SURGERY TESTING |
| title | PROCEDURE DETERMINING VERY LOW CAPACITANCE AND ITS APPLICATION |
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