Distributed programmed memory cells used as memory reference currents
AssigneeLexmark International, Inc.
InventorsJohn Edelen, Paul Graf
Life of this patent
Estimating the term…
Abstract
A memory circuit for an inkjet print head having a plurality of memory cells switchably connected to a source and configured in an array, wherein at least one of the memory cells is a reference memory cell and at least one of the remaining cells are data memory cells, and at least one sense amplifier adapted to compare at least one of a current and voltage received from the reference memory cell with at least one of a current and voltage received from one of the data memory cells and generate an output based on the comparison.
Claims23
A memory circuit for an inkjet print head comprising:
- a plurality of memory cells switchably connected to a source and configured in an array, wherein at least one of said memory cells is a reference memory cell and at least one of said memory cells is a data memory cell;
- and
- at least one sense amplifier adapted to compare at least one of a current and voltage received from said at least one reference memory cell with at least one of a current and voltage received from said at least one data memory cell, and generate an output based on said comparison.
A method for determining the digital state of a data memory cell associated with an inkjet print head, comprising:
- applying a selected source to a reference memory cell of an array of memory cells, including said reference memory cell and at least one data memory cell, to generate at least one of a current and voltage from said reference memory cell;
- applying a source to one of said data memory cells to generate at least one of a current and voltage from said one of said data memory cells;
- comparing said at least one of a current and voltage from said reference memory cell with said at least one of a current and voltage from said one of said data memory cells;
- and
- generating an output based on said comparison.
Dependencies are inferred from the claim text.