Folded-cascode amplifier with efficient feedforward gain-boosting

caroline11

Many applications require a higher open-loop gain than a basic telescopic- or folded-cascode amplifier (FCA) can provide. In such
situations, regulated (active) cascodes are often applied. Alternatively, one can turn to cascading, which results in a second-order system that needs compensation. Miller and Ahuja compensation are two commonly applied techniques. Feedforward compensation is another approach, which tries to overcome some of the limitations of Miller compensation schemes [1, 2]. In the literature, some examples can be found where both cascoding and cascading with feedforward compensation can be found [1]. We present here an alternative feedforward-based gain-boosting technique which integrates efficiently with a folded-cascode amplifier.

许多应用需要比基本的伸缩或折叠级联放大器(FCA)更高的开环增益。在这种情况下，经常使用规范的(主动的)级联码。或者，人们可以转向级联，这导致一个需要补偿的二阶系统。Miller补偿和Ahuja补偿是两种常用的技术。前馈补偿是另一种方法，它试图克服米勒补偿方案的一些局限性。
可以找到一些例子，其中级联编码和前馈补偿可以找到[1]。我们在此提出了一种基于前馈的增益提升技术，该技术有效地集成了折叠级联码放大器。