电-机械式超低频函数发生器的研究
THE DESIGN OF VERY LOW FREQUENCY ELECTRO-MECHANICAL SIGNAL GENERATOR
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摘要: 文中提出了一种由同步马达拖动的电-机械式超低频函数发生器。它的输出几乎没有漂移,在整个工作频带内,不会引起输出幅度的改变,振幅十分稳定。用不稳定度不超过0.1%的恒流电源供电,其他技术指标,如正弦波的非线性失真、频率稳定性和频率误差等,都不逊色于电子式超低频函数发生器。它的输出可供对函数信号有特殊要求的场合使用。本文对这一函数发生器的工作原理作了详细的叙述,其中着重讨论了正弦-余弦函数变换器、电源的选择、电源与函数电位器的最佳连接方案以及恒流电源的工作原理,还阐述了如何有效地消除由电源变压器所引入的干扰信号。Abstract: In this paper a very low frequency electro-mechanical signal generator driven bysynchronous motor with extremely low frequency and amplitude drifts and constant out-put impedance through the entire operating range is described. It is suitable for testing and analysing electronic recorders and other control devices.
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