High-Speed, Low-Power, and Highly Reliable Frequency Multiplier for DLL-Based Clock Generator

作者：Ryu Kyungho; Jung Jiwan; Jung Dong Hoon; Kim Jin Hyuk; Jung Seong Ook^*

来源：IEEE Transactions on Very Large Scale Integration (VLSI) Systems, 2016, 24(4): 1484-1492.

DOI：10.1109/TVLSI.2015.2453366

• Clock generator
• delay-locked loop (DLL)
• edge combiner
• frequency multiplier

A high-speed, low-power, and highly reliable frequency multiplier is proposed for a delay-locked loop-based clock generator to generate a multiplied clock with a high frequency and wide frequency range. The proposed edge combiner achieves a high-speed and highly reliable operation using a hierarchical structure and an overlap canceller. In addition, by applying the logical effort to the pulse generator and multiplication-ratio control logic design, the proposed frequency multiplier minimizes the delay difference between positive-and negative-edge generation paths, which causes a deterministic jitter. Finally, a numerical analysis is performed to analyze and compare the performance of the proposed frequency multiplier with that of previous frequency multipliers. The proposed frequency multiplier is fabricated using a 0.13-mu m CMOS process technology, and has the multiplication ratios of 1, 2, 4, 8, and 16, and an output range of 100 MHz-3.3 GHz. The frequency multiplier achieves a power consumption to a frequency ratio of 2.9 mu W/MHz.

• 出版日期2016-4