US 10,295,612 B2 · Electronic device with resistive sensor array

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.

Claims19

Dependent claims

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.

3 more elements

Dependencies are inferred from the claim text.

Electronic device with resistive sensor array

Life of this patent

Electronic device with resistive sensor array

Life of this patent

Abstract

Claims19