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首页> 外文期刊>Journal of Low Power Electronics >Amplitude and Quadrature Errors of Two-Integrator Oscillator
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Amplitude and Quadrature Errors of Two-Integrator Oscillator

机译：二积分振荡器的幅值和正交误差

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摘要

In this paper we present the analysis of two-integrator oscillator. The main characteristics of this oscillator are its wide tuning range (about a decade), the inherent quadrature outputs, and the low power requirements in comparison with other inductorless oscillators. Using the transistors nonlinearities to limit the amplitude, allows one to avoid the use of extra circuits for automatic amplitude control and, therefore, also reduces the power requirements of the oscillator. We focus the study on the quasi-linear regime where the outputs are sinusoidal. The motivation and main focus of the research is to determine the impact of the components mismatches on the frequency, amplitude-and phase-error. The equations for the amplitude mismatches and the quadrature error are derived. The theory is validated by simulation using the parameters of standard 130 nm CMOS technology. Simulations confirm the amplitude and phase error equations, and show that the quadrature error can be reduced with no impact on the phase noise. The amplitude and quadrature errors may be reduced increasing the transconductance amplifiers gains. The amplitude mismatch is dependent on the ratio of the transconductances and capacitances mismatches. Therefore, with an independent adjustment of the transconductances, the amplitude mismatch can be eliminated even with a mismatch in the capacitances.
机译：在本文中，我们介绍了二积分振荡器的分析。与其他无电感振荡器相比，该振荡器的主要特点是其宽调谐范围（大约十年），固有的正交输出以及低功耗要求。利用晶体管的非线性来限制幅度，可以避免使用额外的电路来进行自动幅度控制，因此也减少了振荡器的功率要求。我们将研究重点放在输出为正弦曲线的准线性状态下。该研究的动机和主要重点是确定组件失配对频率，幅度和相位误差的影响。推导了振幅失配和正交误差的方程式。通过使用标准130 nm CMOS技术的参数进行仿真，验证了该理论。仿真证实了幅度和相位误差方程，并表明可以减小正交误差，而不会影响相位噪声。幅度和正交误差可以减小，从而增加跨导放大器的增益。幅度失配取决于跨导和电容失配的比率。因此，通过跨导的独立调节，即使电容不匹配，也可以消除幅度不匹配。

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