用于高速应用的占空比控制电路

A. Tajalli, S. Mehrmanesh, S. M. Atarodi
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引用次数: 5

摘要

讨论了一种适用于高速应用的精确、可编程的CMOS占空比控制电路。所提出的DCC电路具有一阶传递函数,其精度仅受片上器件失配的限制。工作频率为1GHz,通过改变充电泵电路(CPC)的充电和放电电流,输出时钟的占空比可以在45%到60%之间调整。CPC电流通过5个控制位进行控制。该电路采用0.18/spl mu/m CMOS技术设计,从1.8V电源输出160/spl mu/ a,误差小于0.3/spl times/LSB。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A duty cycle control circuit for high speed applications
An accurate and programmable CMOS duty-cycle control (DCC) circuit for high-speed applications is discussed. Proposed DCC circuit has a first order transfer function the accuracy of which is just limited by the on-chip device mismatch. Operating at 1GHz frequency, the duty-cycle of the output clock can be tuned between 45 to 60% by changing the charge and discharge currents of a charged-pump circuit (CPC). CPC's current is controlled through five controlling bits. The circuit is designed in a 0.18/spl mu/m CMOS technology and draws 160/spl mu/A from a 1.8V supply with less than 0.3/spl times/LSB error.
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