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基于0.12微米CMOS技术10GHz环形电压控制振荡器(VCO)可用于SDH(STM-64)和SONET(OC-192)光接收机的时钟恢复电路。该振荡器设计的关键是采用了容性源极耦合电流放大器(SC3A)。由于带通特性的SC3A的特点,该压控振荡器有较大的调谐范围及较低的噪声,其中心频率为10GHz,可以在8.4GHz至10.6GHz的频率范围内工作,在偏离中心频率1MHz处的单边带相位噪声约为-85dBc/Hz。
A 10GHz ring voltage controlled oscillator (VCO) based on 0.12μm CMOS technology is available for clock recovery circuits for SDH (STM-64) and SONET (OC-192) optical receivers. The key to this oscillator design is to use a capacitive source-coupled current amplifier (SC3A). Due to the band-pass characteristics of the SC3A, the voltage-controlled oscillator has a larger tuning range and lower noise, the center frequency of 10GHz, you can work in the 8.4GHz to 10.6GHz frequency range, at a deviation from the center frequency of 1MHz The single-sideband phase noise is approximately -85dBc / Hz.