Patent ID: 9595304
Date: 2017-03-14
CPC Classifications: G11C

Claim:
1. A current sense amplifier comprising: a reference current input terminal; a sense control line input terminal; a sense current input terminal; a first output terminal; a first NAND gate having an output terminal connected to the first output terminal; a second output terminal; a second NAND gate having an output terminal connected to the second output terminal; a first cross coupled inverter comprising a first n-FET; a second cross coupled inverter comprising a second n-FET; a transmission gate comprising a first and a second transmission terminal and a transmission control terminal, the transmission control terminal being connected to the sense control line input terminal; an AND gate having a first input terminal connected to the first output terminal and a second input terminal connected to the second output terminal; and a third n-FET having a gate connected to an output terminal of the AND gate, a drain connected to the sense current input terminal, and a source connected to ground; wherein a source of the first n-FET is connected to the sense current input terminal and a source of the second n-FET is connected to the reference current input terminal; and wherein a first input terminal of the first NAND gate and a first input terminal of the second NAND gate are connected to the sense control line input terminal; and wherein the first transmission terminal and a second input terminal of the first NAND gate are connected to an output terminal of the second inverter and the second transmission terminal and a second input terminal of the second NAND gate are connected to an output terminal of the first inverter.