本文讨论了在滤波器中加入双曲正弦函数电路后环路的无嗓捕捉性能和有噪跟踪性能。导出了环路的无噪捕捉性能公式,由计算机模拟求解出有噪环路的稳态相差方差。结果表明,环路捕捉性能有明显改善,同时仍能保持良好的稳态跟踪性能。文中提出一个实验环路,并对它的无噪捕捉性能进行了测试,结果和理论分析的结论一致。 This article discusses the loopless throat capture performance and noisy tracking performance after adding a hyperbolic sine function circuit to the filter. The non-noise capture performance formula of the loop is derived, and the steady-state phase difference of the noisy loop is solved by computer simulation. The results show that the loop capture performance has been significantly improved, while still maintaining good steady-state tracking performance. An experimental loop is proposed in this paper, and its noiseless capture performance is tested. The result is consistent with the theoretical analysis.