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A hybrid-coded architecture for glitch-free gain control

机译：用于无干扰增益控制的混合编码架构

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摘要

Gain control circuits, such as step attenuators, are commonly controlled using binary-coded or thermometer-coded architectures. These schemes have disadvantages which adversely affect system performance. For example, radio board manufacturers are well aware that binary-coded circuits exhibit a transient glitch response during attenuation step transitions. Signal glitches are detrimental to both system linearity and reliability and board designers are forced to implement linearization schemes to suppress their effect. Thermometer-coded architectures are glitch-free, but they are not area efficient and can add a high degree of parasitic capacitance that can limit RF bandwidth. This paper presents a novel hybrid-coded architecture that effectively solves the signal glitch problem. An attenuator is used as an application example, although hybrid-coding can serve any circuit that has range and resolution.
机译：增益控制电路（例如步进衰减器）通常使用二进制编码或温度计编码的架构进行控制。这些方案具有不利地影响系统性能的缺点。例如，无线电板制造商很清楚，二进制编码电路在衰减阶跃转换过程中表现出瞬态毛刺响应。信号毛刺对系统的线性度和可靠性均有害，电路板设计人员被迫实施线性化方案以抑制其影响。温度计编码的架构没有毛刺，但它们的面积效率不高，并且会增加高度的寄生电容，从而限制了RF带宽。本文提出了一种新颖的混合编码架构，可有效解决信号毛刺问题。尽管混合编码可以为具有范围和分辨率的任何电路提供服务，但衰减器用作应用示例。

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