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US 6,646,945 B1Granted
Reference voltage filter for memory modules
AssigneeMicron Technology, Inc.
InventorsTerry R. Lee, George Pax
Life of this patent
Estimating the term…
Abstract
A plug-in module, e.g., a memory module, for a bus system is disclosed. Each module includes a filter for filtering a reference voltage signal line, with the modules being arranged such that each of the filters in successive modules are cascaded.
Claims36
A memory module comprising:
- a memory module substrate for supporting at least one integrated circuit memory device;
- at least one integrated circuit memory device supported on said substrate, said memory device having a reference voltage input terminal;
- a filter provided on said substrate separate from said integrated circuit for filtering a reference voltage, an output of said filter being applied to said reference voltage input terminal;
- a reference voltage input terminal provided on said substrate and electrically connected to an input of said filter;
- and
- wherein said filter is a low pass filter.
3 more elements
A memory module comprising:
- a memory module substrate for supporting at least one integrated circuit memory device;
- at least one integrated circuit memory device supported on said substrate, said memory device having a reference voltage input terminal;
- a filter provided on said substrate separate from said integrated circuit for filtering a reference voltage, an output of said filter being applied to said reference voltage input terminal;
- a reference voltage input terminal provided on said substrate and electrically connected to an input of said filter;
- and
- wherein said filter attenuates high frequency noise present in said reference voltage.
3 more elements
A memory module comprising:
- a memory module substrate for supporting at least one integrated circuit memory device;
- at least one integrated circuit memory device supported on said substrate, said memory device having a reference voltage input terminal;
- a filter provided on said substrate separate from said integrated circuit for filtering a reference voltage, an output of said filter being applied to said reference voltage input terminal;
- a reference voltage input terminal provided on said substrate and electrically connected to an input of said filter;
- a reference voltage output terminal provided on said substrate which is electrically connected to the output of said filter;
- and
- a bus connector for receiving said memory module, said bus connector having first and second terminals respectively receiving said reference voltage input connection terminal and said reference voltage output connection terminal.
4 more elements
A memory system comprising:
- a bus;
- a plurality of connectors coupled to said bus, each having terminals for connecting said bus to a memory module;
- a plurality of memory modules respectively connected with said connectors, each of said memory modules comprising:
- a substrate;
- at least one memory device on said substrate, said memory device having a reference voltage input;
- a filter provided on said substrate for filtering a reference voltage, an output of said filter being applied to said reference voltage input;
- a reference voltage input terminal provided on said substrate and electrically connected to an input of said filter, said reference voltage input terminal receiving a reference voltage from a said connector.
4 more elements
A bus system comprising:
- a plurality of signal lines, at least one of said signal lines supplying a first voltage signal;
- a plurality of connectors coupled to said plurality of signal lines, each having terminals for connecting a plug-in module to said signal lines;
- at least one plug-in module connected to one of said connectors, said plug-in module comprising:
- at least one device having an input for receiving said first voltage signal;
- a filter mounted on said module for connection to said at least one signal line for filtering said first voltage signal;
- and
- a reference voltage input connection terminal and a reference voltage output connection terminal mounted on said plug-in module for respective connection with mating terminals of a said connector, said reference voltage input connection terminal being electrically connected to an input of said filter and said reference voltage output connection terminal being connected to said output of said filter.
4 more elements
A method of operating a memory module containing at least one integrated memory device, said method comprising:
- receiving a reference voltage at an input terminal of said memory module;
- filtering said reference voltage received at said input terminal of said memory module;
- applying the resulting filtered reference voltage to at least one input terminal of at least one integrated circuit memory device provided on said memory module;
- and
- providing said filtered reference voltage as an output signal of said memory module.
2 more elements
A method of operating a memory module containing at least one integrated, memory device, said method comprising:
- receiving a reference voltage at an input terminal of said memory module;
- filtering said reference voltage received at said input terminal of said memory module;
- applying the resulting filtered reference voltage to at least one input terminal of at least one integrated circuit memory device provided on said memory module;
- and
- wherein said filtering is a low pass filtering.
2 more elements
A method of operating a memory module containing at least one integrated memory device, said method comprising:
- receiving a reference voltage at an input terminal of said memory module;
- filtering said reference voltage received at said input terminal of said memory module;
- applying the resulting filtered reference voltage to at least one input terminal of at least one integrated circuit memory device provided on said memory module;
- and
- wherein said filtering filters high frequency noise present in said reference voltage.
2 more elements
A processor system comprising:
- a processor;
- a bus system coupled to said processor;
- and
- at least one memory module coupled to said bus system, said memory module comprising:
- a substrate;
- at least one memory device provided on said substrate, said memory device having a reference voltage input;
- a filter provided on said substrate for filtering a reference voltage, an output of said filter being applied to said reference voltage input;
- a reference voltage input terminal provided on said substrate, said reference voltage input connection terminal being connected to an input of said filter.
5 more elements
A method of operating a memory module containing at least one integrated as memory device, said method comprising:
- receiving a reference voltage at an input terminal of said memory module;
- filtering said reference voltage received at said input terminal of said memory module;
- applying the resulting filtered reference voltage to at least one input terminal of at least one integrated circuit memory device provided on said memory module;
- and
- wherein said memory module contains a plurality of integrated circuit memory devices thereon, said method further comprising applying the resulting filtered reference voltage to at least one input terminal of each of said plurality of memory devices.
2 more elements
A memory module comprising:
- a memory module substrate for supporting at least one integrated circuit memory device;
- at least one integrated circuit memory device supported on said substrate, said memory device having a reference voltage input terminal;
- a filter provided on said substrate separate from said integrated circuit for filtering a reference voltage, an output of said filter being applied to said reference voltage input terminal;
- a reference voltage input terminal provided on said substrate and electrically connected to an input of said filter;
- a reference voltage output terminal provided on said substrate which is electrically connected to the output of saidfilter;
- and
- wherein said filter is a low pass filter.
4 more elements
A method of operating a memory module containing at least one integrate memory device, said method comprising:
- receiving a reference voltage at an input terminal of said memory module;
- filtering said reference voltage received at said input terminal of said memory module;
- applying the resulting filtered reference voltage to at least one input terminal of at least one integrated circuit memory device provided on said memory module;
- providing said filtered reference voltage as an output signal of said memory module;
- and
- wherein said is a low pass filtering.
3 more elements
Dependencies are inferred from the claim text.