JSSC 2014第9期RF & WirelessOp-Amp

Comments and Corrections Comments on “Cancellation of OpAmp Virtual Ground Imperfections by a Negative Conductance Applied to Improve RF Receiver Linearity” P . V . Ananda Mohan, Eric A. M. Klumperink, Dlovan H. Mahrof, and Bram Nauta In the above paper [1], not only [2] but also older papers [3]–[5] ex- ploiting a negative impedance connected to the virtua l ground node should have been included as references. As discussed more exten- sively in a recent book [6], all these papers aim at mitigating the vir-

评论并补充关于消除运放虚拟地缺陷的参考文献。

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运放虚拟地负阻抗线性度放大器

▸创新点1：负阻抗连接虚拟地节点，通过引入负阻抗技术有效抵消运算放大器虚拟地节点的非理想特性，显著提升RF接收器的线性度。

▸创新点2：主动补偿技术，利用负阻抗转换器（NIC）实现主动补偿，减少虚拟地节点的误差，提高电路的稳定性和性能。

▸创新点3：频率依赖增益的低误差放大器，通过负阻抗补偿技术实现的放大器具有低幅度和相位误差，适用于高频应用，提升信号处理精度。

Abstract

Improve RF Receiver Linearity” P . V . Ananda Mohan, Eric A. M. Klumperink, Dlovan H. Mahrof, and Bram Nauta In the above paper [1], not only [2] but also older papers [3]–[5] ex- ploiting a negative impedance connected to the virtua l ground node should have been included as references. As discussed more exten- sively in a recent book [6], all these papers aim at mitigating the vir- tual ground imperfections using a grounded negative conductance. This technique was ﬁrst proposed by Boutin [3]