A 90nm CMOS wide-band voltage-controlled ring oscillator for digital TV-tuner

Kai Yu, X. Zou, Jianming Lei, Guoyi Yu, Sizhen Li, Yunwu Chen
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引用次数: 3

Abstract

A voltage-controlled ring oscillator in 90 nm CMOS technology with ultra wide-band and low phase noise for digital TV-tuner is presented. By introducing pre-amplifying transistors to get novel four outputs delay stage, tuning range is greatly widened. Pre-charging transistors with optimized control method decrease phase noise without increasing parasitic capacitances. The oscillator can be operated from 38 MHz to 1.38 GHz, while worst phase noises are -107 dBc/Hz at 1 MHz offset and -85 dBc/Hz at 100 KHz offset in full frequency range. It maximally consumes 11.1 mA with 1.8 V supply voltage.
一种用于数字电视调谐器的90纳米CMOS宽带压控环形振荡器
提出了一种用于数字电视调谐器的90 nm超宽带低相位噪声压控环形振荡器。通过引入前置放大晶体管,获得新颖的四输出延时级,大大拓宽了调谐范围。采用优化控制方法的预充电晶体管在不增加寄生电容的情况下降低了相位噪声。振荡器可以在38 MHz至1.38 GHz范围内工作,而在全频率范围内,最差相位噪声为-107 dBc/Hz,在1 MHz偏移量和100 KHz偏移量时为-85 dBc/Hz。它在1.8 V电源电压下最大消耗11.1 mA。
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