Electronic device with resistive sensor array
First Claim
1. Resistive sensor circuitry, comprising:
- an array of resistive sensors having rows and columns, wherein the array of resistive sensors are configured to make ambient air measurements; and
resistive sensor array control circuitry including row decoder circuitry that is configured to select a row of the array and column readout circuitry that gathers resistive sensor measurements from each of the resistive sensors in the selected row, wherein the column readout circuitry further comprises;
memory cells, each of which is coupled to a respective column of resistive sensors in the array; and
a counter that provides the memory cells with a count value.
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Accused Products
Abstract
An array of resistive sensor circuits may be used to gather sensor data. Each resistive sensor circuit may have a resistive sensor and an associated switch. Row decoder circuitry may supply rows of the sensor circuits with control signals on row lines. Capacitors associated with respective columns of the array may be provided with an initialization voltage. The control signals on the row lines may be used to turn on the switches in a selected row of the resistive sensor circuits and thereby discharge the capacitors through the resistive sensors of that row. Comparators may have first inputs coupled to the capacitors and second inputs that receive a reference voltage. A column readout circuit may have memory and processing circuitry that receives count values from a counter and that stores the count values in response to toggling output signals from the comparators.
24 Citations
19 Claims
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1. Resistive sensor circuitry, comprising:
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an array of resistive sensors having rows and columns, wherein the array of resistive sensors are configured to make ambient air measurements; and resistive sensor array control circuitry including row decoder circuitry that is configured to select a row of the array and column readout circuitry that gathers resistive sensor measurements from each of the resistive sensors in the selected row, wherein the column readout circuitry further comprises; memory cells, each of which is coupled to a respective column of resistive sensors in the array; and a counter that provides the memory cells with a count value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. Circuitry, comprising:
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an array of resistive sensors having rows and columns, wherein each row includes a row line and wherein each column includes a column line, wherein each resistive sensor in the array is coupled to a respective column line via a corresponding first switch; a row decoder configured to control the first switch associated with each resistive sensor in the array; capacitors, wherein each capacitor is coupled to a respective one of the column lines at a node; and second switches each of which is coupled to a respective one of the nodes. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. Resistive sensor circuitry, comprising:
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an array of resistive sensor circuits having rows and columns, wherein each resistive sensor circuit has a switch and a resistive sensor having a first terminal coupled to the switch and a second terminal directly connected to a ground line; capacitors each of which is associated with one of the columns; and row decoder circuitry that selectively turns on the switches in a selected one of the rows and thereby discharges the capacitor in each column through the resistive sensor that is in the selected row and that is in that column. - View Dependent Claims (16, 17, 18, 19)
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Specification