In this paper, we present the design of an analog Automatic Gain Control with a small silicon area and reduced power consumption using a 0.5 $\mathsf{\mu }$ m process. The design uses a classical approach implementing the AGC system with simple blocks, such as: peak detector, difference amplifier, four-quadrant multiplier, and inversor amplifier. Those blocks were realized by using a modified Miller type OPAMP, which allows indirect compensation, while the peak detector uses a MOS diode. The AGC design is simulated using the Tanner-Eda environment and Berkeley models BSIM49 of the On-Semiconductor C5 process, and it was fabricated through the MOSIS prototyping service. The AGC system has an operation frequency of around 1kHz, covering the range of biomedical applications, power consumption of 200 $\mathsf{\mu }$ W, and the design occupies a silicon area of approximately 508.8 $\mathsf{\mu }$ m × 317.7 $\mathsf{\mu }$ m. According to the characteristics obtained at the experimental level (attack and release time), this AGC can be applied to hearing aid systems.

中文翻译：

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用于生物医学应用的CMOS模拟AGC

在本文中，我们提出了一种模拟自动增益控制的设计，该设计具有较小的硅片面积，并且功耗降低了0.5％。 $\mathsf{\mu }$ 米的过程。该设计使用经典方法来实现具有简单模块的AGC系统，例如：峰值检测器，差分放大器，四象限乘法器和逆变器放大器。这些模块是通过使用改进的Miller型OPAMP实现的，该模块允许间接补偿，而峰值检测器则使用MOS二极管。AGC设计是使用Tanner-Eda环境和On-Semiconductor C5工艺的Berkeley模型BSIM49进行仿真的，并且是通过MOSIS原型服务进行制造的。AGC系统的工作频率约为1kHz，涵盖了生物医学应用的范围，功耗为200 $\mathsf{\mu }$ W，而设计占用的硅面积约为508.8 $\mathsf{\mu }$ 米×317.7 $\mathsf{\mu }$ 米 根据在实验级别获得的特征（攻击和释放时间），该AGC可以应用于助听器系统。