This paper presents a salient clock deskewing methodwith a mixed-mode delay-locked loop (MDLL) for high-speedsynchronous DRAM applications. The presented method not onlysolves the resolution problem of conventional digital deskewingcircuits, but also improves the jitter performance to the level ofwell-designed analog deskewing circuits, while keeping the powerconsumption and locking speed of digital deskewing circuits.The whole deskewing circuit is fabricated in a 3.3-V 0.6μ mtriple-metal CMOS process and occupies a die area of 0.45 mm2.Measured rms jitter is 6.38 ps. The power consumption of theentire chip, including I/O peripherals, is 33 mW at 200 MHz witha 3.3-V supply.
推荐帖子
评论