In this paper, a complex second-order charge-sampling switched gm-C semi-passive band-pass filter (BPF) is presented which by using the technique of increasing the number of input signal phases without the need to increase the number of clock phases and switches, has been improved out-of-band rejection, near-band rejection and the quality factor of the filter. In addition to the tunable bandwidth and center frequency that can be tuned independently, the proposed filter provides a very high linearity and consumes low power. Designed and simulated in a 0.18-μm standard CMOS technology, this filter operating at 1GS/s sampling rate has an adjustable center frequency of 11.68–28.5MHz and a tunable bandwidth of 1.8–8.74MHz. Also, the out-of-band rejection varies from 37dB to 39dB in an offset frequency of 3 fc. The in-band IIP3, power consumption and input-referred noise are 28dBm, 5mW and 13.8–18.8nv/sqrt (Hz), respectively

中文翻译：

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高 Q、高抑制比复合二阶电荷采样开关 gm-C 半无源带通滤波器

在本文中，一个复杂的二阶电荷采样开关G米-C提出了半无源带通滤波器 (BPF)，它通过使用增加输入信号相位数量而不需要增加时钟相位和开关数量的技术，提高了带外抑制，近带阻和滤波器的品质因数。除了可以独立调整的可调带宽和中心频率之外，所提出的滤波器还提供了非常高的线性度和低功耗。在一个设计和模拟0.18-μm 标准 CMOS 技术，该滤波器工作在 1GS/s 采样率具有 11.68–28.5 的可调中心频率MHz 和 1.8–8.74 的可调谐带宽兆赫。此外，带外抑制从 37分贝至 39偏移频率为 3 fc 时的 dB。带内 IIP3、功耗和输入参考噪声为 28分贝，5mW 和 13.8–18.8nv/sqrt (Hz)，分别