SENSING APPARATUS AND ASSOCIATED METHODS

• Main Author: ASTLEY MICHAEL
• Format: Patent
• Language: Chinese; English
• Published: 17.07.2018
• Subjects: BASIC ELECTRIC ELEMENTS; BASIC ELECTRONIC CIRCUITRY; CALCULATING; COLORIMETRY; COMPUTING; CONTROLLING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC DIGITAL DATA PROCESSING; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; PULSE TECHNIQUE; RADIATION PYROMETRY; REGULATING; SEMICONDUCTOR DEVICES; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; TESTING

An apparatus comprising: a passive array (202) of resistive elements (250); a row selector switch (204) and a column selector switch (206) configured to respectively connect a particular row and a particular column of resistive elements to ground; and a feedback column selector switch (208) configured to connect all columns of resistive elements to a voltage source, except for the particular column connected to ground by the column selector switch; the voltage source configured to apply a voltage to the columns of resistive elements, the voltage matching a voltage dropped over the resistive element connected in circuit by the row and column selector switches; and further comprising: a row selector switch compensation circuit (220), a column selector switch compensation circuit (240) and/ora feedback column selector switch compensation circuit (260) each configured to apply a voltage across a corresponding dummy element equal and opposite to a voltage dropped over the corresponding selector switch. 种装置，包括：电阻元件