| 摘要 |
PROBLEM TO BE SOLVED: To provide a sense amplifier circuit of a resistive memory that has a current reuse function, high noise resistance characteristics, and a readout and/or reuse operation mode.SOLUTION: A sense amplifier of a resistive memory includes: differential output terminals; first and second input terminals; and a precharge section. The sense amplifier can reduce overall current consumption in a circuit and improve noise resistance by reusing current during stages of "setting" or "amplification" thereof. A voltage level at a high-impedance output terminal varies in response to a delta average current between a reference line current and a bit line current. In an operation in a "progress" or "latch" stage, a logical value "0" or "1" is latched by the differential output terminals through positive feedback of a latch circuit. Further, a current mirror circuit can be used while coupled to the sense amplifier circuit, which can assist in readout/rewrite operation. |
