← 返回 JSSC 论文列表JSSC 2012第3期Power Management0.13μmPLLVCO
A 1938 GHz Fractional-N PLL Frequency Synthesizer With Fast Auto-Calibration of
一种1.9-3.8GHz分数分频锁相环，采用快速自动校准技术实现恒定环路带宽和快速锁定。
1.9-3.8GHz, 0.13μm CMOS, 环路带宽校准1.1-6.0μs(±3%), VCO校准1.225-4.025μs
分数分频锁相环自动校准频率合成器恒定环路带宽CMOS
▸高速频率-数字转换器(FDC)实现片上VCO频率测量
▸环路带宽自动校准技术实现恒定带宽
▸最小误差码查找算法提高VCO频率校准精度
Abstract
A fast and high-precision all-digital aut omatic
calibration circuit that is highly suited for fractional-N
synthesizers is designed to achieve a constant loop bandwidth
and fast lock time over an octave tuning range . A high-speed
frequency-to-digital converter (FDC) measures VCO frequency
o n - c h i pw i t has u b -
frequency resolution of in a
time period of . The on-chip detected VC O frequency
is then used for calibrating the loop bandwidth and the VCO
frequency. The loop bandwidth calibra