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Theory of twin-T RC-networks and their application to oscillators

机译：Twin-T RC网络理论及其在振荡器中的应用

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摘要

The transmission properties of a twin-T RC-network are discussed in the first part of the paper. The condition is derived which the elements must satisfy in order that for one frequency (????????0) the network may have an infinitely great attenuation; next is discussed the condition which must be satisfied in order that, when two elements are altered in a particular manner, the output voltage of the network may be either in phase or in counterphase with the input voltage for the same frequency as the one for which the circuit had an infinitely great attenuation before the elements were altered. The circuit Q, to be defined for the network, is used to advantage, and forms the subject of a discussion. Finally, the slope of the phase-frequency characteristic for ????????= ????????0 is examined and this slope is compared with that of a parallel resonant LC circuit. The second part of the paper deals with the properties of an oscillator having one valve and containing such an RC-network. Special attention is paid to the freedom from distortion and to the amplitude and frequency stability. Finally the results of a measurement are compared with those obtained from a calculation.
机译：本文的第一部分讨论了Twin-T RC网络的传输特性。推导出元素必须满足的条件，以便对于一个频率（∑Δ∑0），网络可以具有无限大的衰减。接下来讨论必须满足的条件，以便在以特定方式更改两个元素时，网络的输出电压可以与输入电压同相或反相，并且输入电压与该频率相同。在改变元件之前，电路具有无限大的衰减。将为网络定义的电路Q是有好处的，它构成了讨论的主题。最后，检查Δε＝ 0 ＝Δε＝ 0的相频特性的斜率，并将该斜率与并联谐振LC电路的斜率进行比较。本文的第二部分讨论具有一个阀并包含这种RC网络的振荡器的特性。要特别注意避免失真以及幅度和频率稳定性。最后，将测量结果与从计算中获得的结果进行比较。

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