High performance eDRAM sense amplifier
First Claim
1. An embedded dynamic random access memory (eDRAM) sense amplifier circuit comprising:
- a first plurality of control lines each respectively connected to one of a plurality of eDRAM cells, wherein a first eDRAM cell is configured to release a charge indicating a digital state of the first eDRAM cell in response to a signal from a first control line of said first plurality of control lines;
a mid-rail amplifier circuit configured to amplify said charge indicating the digital state of the first eDRAM cell;
a latch circuit with an input connected to an output of the mid-rail amplifier circuit, an output of the latch circuit being connected to an output of the eDRAM sense amplifier; and
a writeback line connected to the output of the latch circuit.
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Accused Products
Abstract
Embedded dynamic random access memory (eDRAM) sense amplifier circuitry in which a bit line connected to each of a first plurality of eDRAM cells is controlled by cell control lines tied to each of the cells. During a READ operation the eDRAM cell releases its charge indicating its digital state. The digital charge propagates through the eDRAM sense amplifier circuitry to a mid-rail amplifier inverter circuit which amplifies the charge and provides it to a latch circuit. The latch circuit, in turn, inverts the charge to correctly represent at its output the logical value stored in the eDRAM cell being read, and returns the charge through the eDRAM sense amplifier circuitry to replenish the eDRAM cell.
395 Citations
15 Claims
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1. An embedded dynamic random access memory (eDRAM) sense amplifier circuit comprising:
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a first plurality of control lines each respectively connected to one of a plurality of eDRAM cells, wherein a first eDRAM cell is configured to release a charge indicating a digital state of the first eDRAM cell in response to a signal from a first control line of said first plurality of control lines; a mid-rail amplifier circuit configured to amplify said charge indicating the digital state of the first eDRAM cell; a latch circuit with an input connected to an output of the mid-rail amplifier circuit, an output of the latch circuit being connected to an output of the eDRAM sense amplifier; and a writeback line connected to the output of the latch circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An eDRAM sense amplifier circuit, comprising:
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a mid-rail amplifier circuit and configured to amplify a charge indicating a digital state of an eDRAM cell; a latch circuit with an input in communication with an output of the mid-rail amplifier circuit, an output of the latch circuit being configured to provide a signal to an output of the eDRAM sense amplifier; a capacitor connected in parallel with a transistor, wherein the mid-rail amplifier circuit is in communication with a bit line of the eDRAM cell via said capacitor in parallel with the transistor; and a writeback line connecting the output of the latch circuit and the bit line. - View Dependent Claims (12, 13, 14, 15)
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Specification