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US 12,769,688 B2Granted
Cross-point array with matched filters for noise reduction
AssigneeInternational Business Machines Corporation
InventorsGuy M. Cohen, Takashi Ando, Nanbo Gong
Life of this patent
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Abstract
A cross-point array includes an array of Resistive Processing Unit (RPU) devices having rows and columns interconnected at cross-points, wherein the RPU devices receive a finite duration input voltage on the rows and output a current on the columns. An input-signal matched filter is coupled to each of the columns to reduce noise in the current in accordance with the finite duration input voltage.
Claims18
A cross-point array, comprising:
- an array of Resistive Processing Unit (RPU) devices having rows and columns interconnected at cross-points, wherein the RPU devices receive a finite duration input voltage on the rows and output a current on the columns and each RPU device includes a nonvolatile tunable resistive element and an access device;
- and
- an input-signal matched filter coupled to each of the columns to reduce noise in the current in accordance with the finite duration input voltage, wherein the matched filter reduces noise in current output from the RPU devices in accordance with a signal template provided by an input voltage signal, wherein the matched filter includes a digital bandpass filter and a finite impulse response filter designed for the digital bandpass filter for amplitude frequency characteristics.
A cross-point array, comprising:
- an array of Resistive Processing Unit (RPU) devices having rows and columns interconnected at cross-point, wherein each RPU device includes a nonvolatile tunable resistive element and an access device;
- and
- a plurality of input-signal matched filters each coupled to a column of the columns and including a custom bandpass filter configured to find an input voltage signal having a sinusoidal form of finite duration in a noisy output current signal to reduce noise, wherein each matched filter reduces noise in current output from the RPU devices in accordance with a signal template provided by an input voltage signal, wherein the matched filter includes a digital bandpass filter and a finite impulse response filter designed for the digital bandpass filter for amplitude frequency characteristics.
A method for fabricating a cross-point array with reduced noise, comprising:
- forming an array of Resistive Processing Unit (RPU) devices having rows and columns interconnected at cross-points, wherein each RPU device includes a nonvolatile tunable resistive element and an access device;
- and
- forming matched filters coupled to the columns, the matched filters reduce noise in current output from the RPU devices in accordance with a signal template provided by an input voltage signal, wherein the matched filter includes a digital bandpass filter and a finite impulse response filter designed for the digital bandpass filter for amplitude frequency characteristics.
Dependencies are inferred from the claim text.