数字锁相环精密电流匹配电荷泵

2016 Second International Conference on Cognitive Computing and Information Processing (CCIP) Pub Date : 2016-08-01 DOI:10.1109/CCIP.2016.7802854

D. Rajeshwari, P. V. Rao

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引用次数: 5

摘要

在数字锁相环中，提出了电流失配小于0.01%的级联结构电荷泵。通过减小电流失配，可以使数字锁相环的稳态误差降到最低。采用轨对轨运算放大器和级联码电流源电路，减小了充放电电流的不匹配。运算放大器具有90dB的高增益。采用台积电90nm CMOS工艺，在1.8V电源下设计、仿真并验证了所提出的电荷泵。

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Precise current matching charge pump for digital phase locked loop

In digital phase locked loop cascode structured charge pump is proposed with current mismatch less than 0.01%. Steady state error in digital phase locked loop can be minimized by reducing current mismatch. The rail to rail operational amplifier and cascode current source circuit is employed to reduce the mismatch between charging and discharging current. The operational amplifier has high gain of 90dB. The proposed charge pump is designed, simulated and verified at power supply of 1.8V in TSMC 90nm CMOS technology.

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来源期刊

2016 Second International Conference on Cognitive Computing and Information Processing (CCIP)

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