Stable band-pass non-Foster circuits
Stable band-pass non-Foster circuits
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稳定的带通非福斯特电路
DOI：
10.1109/aps.2015.7305082
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
S. D. Stearns
中科院分区：
文献类型：
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作者：
S. D. Stearns
非培育电路通常是通过制造像负电容或负电感一样的有源电路来设计的，然后将其替换成所需的电路。结果通常是不稳定的。结果表明，对于由理想元件+R、±L、±C组成的线性电路，几乎所有电路拓扑结构都在右半平面（RHP）具有固有频率，并且是先验不稳定的。因此，标准的设计方法是错误的。一个合适的非福斯特电路理论不能基于理想的负电容和负电感作为可接受的电路元件。引入了两个新的电路元件，仅在规定的通频带上提供非福斯特行为。这些元件产生的电路在正、非零带宽上表现出期望的非福斯特行为，更重要的是，在线性电路理论的框架内被证明是稳定的。
Non-Foster circuits are commonly designed by making active circuits that act like negative capacitors or negative inductors which are then substituted into a desired circuit. The result is usually unstable. It was shown that for linear circuits composed of the ideal elements +R, ±L, ±C, almost all circuit topologies have natural frequencies in the right half plane (RHP) and are a priori unstable. Hence, the standard design approach is misguided. A suitable theory of non-Foster circuits cannot be based on ideal negative capacitors and negative inductors as admissible circuit elements. Two new circuit elements are introduced that provide non-Foster behavior only over a prescribed passband. These elements yield circuits that exhibit desired non-Foster behavior over positive, non-zero bandwidths and, more important, are shown to be provably stable within the framework of linear circuit theory.