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随着微电子技术节点不断向前推进,非挥发性存储器(NVM)的容量迅速增大,对读取速度的要求也日益提高。通常,在大规模快闪存储器中采用页读取模式将多个比特的数据同时读取到缓存中,再从缓存中依次输出数据。这样等效于缩短读取周期,但也会遇到瞬态功耗过大的问题。作为改进措施,提出一种新型电流型灵敏放大器的预充方法,在传统灵敏放大器的基础上,采取多相位预充的方法,分时段对位线进行预充电,将瞬态大电流平均到整个预充周期,从而在保证低功耗的同时加大页读取的容量,提高读取速度。经验证,采用该方法的灵敏放大器具有较快的读取速度、较低的功耗,在3.3V工作电压下,电路的读取时间为7ns。
As the microelectronic technology nodes continue to move forward, the capacity of non-volatile memory (NVM) rapidly increases, and the requirements for reading speed are also increasing. In general, page read mode is used in large-scale flash memory to read multiple bits of data into the buffer at the same time, and then the data is output sequentially from the buffer. This is equivalent to shortening the read cycle, but also encounters the problem of excessive transient power dissipation. As an improvement measure, a new preamplifier method of current-sense amplifier is proposed. Based on the traditional sense amplifier, a multi-phase pre-charge method is used to pre-charge the bit lines in different time periods to average the transient large current to the whole Precharge cycle, thus ensuring low power consumption at the same time increase page read capacity, improve read speed. Proven, using the method of the sense amplifier has a faster read speed, lower power consumption, 3.3V operating voltage, the circuit read time of 7ns.