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首页> 外文期刊>IEEE Journal of Solid-State Circuits >A 13-dB IIP3 Improved Low-Power CMOS RF Programmable Gain Amplifier Using Differential Circuit Transconductance Linearization for Various Terrestrial Mobile D-TV Applications
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A 13-dB IIP3 Improved Low-Power CMOS RF Programmable Gain Amplifier Using Differential Circuit Transconductance Linearization for Various Terrestrial Mobile D-TV Applications

机译：使用差分电路跨导线性化的13dB IIP3改进型低功耗CMOS RF可编程增益放大器，适用于各种地面移动D-TV应用

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摘要

A CMOS RF digitally programmable gain amplifier (RF PGA), covering various terrestrial mobile digital TV standards (DMB, ISDB-T, and DVB-H) is implemented as a part of a low-IF tuner IC using 0.18-μm CMOS technology. An improvement of 13-dB IIP3 is attained without significant degradation of other performance criteria like gain, noise figure, common-mode rejection ratio, etc., at similar power consumption. This is achieved by applying a newly proposed differential circuit gm" (the second derivatives of transconductance) cancellation technique, called the differential multiple gated transistor (DMGTR). In the DMGTR amplifier, the negative value of gm" in the fully differential amplifier can be compensated by the positive value of gm" in the pseudo differential amplifier which is properly sized and biased. By adopting the DMGTR, a low-power highly linear RF PGA is implemented. Also, in order to have wide gain range with fine step resolution, a new RF PGA architecture is proposed. The measurement results of the proposed RF PGA exhibit 50-dB gain range with 0.25-dB resolution, 4.5-dB noise figure, a - 4-dBm IIP3 (maximum 30 dBm) and 25-dB gain at 16-mW power consumption.
机译：CMOS RF数字可编程增益放大器（RF PGA）覆盖了各种地面移动数字电视标准（DMB，ISDB-T和DVB-H），是使用0.18μmCMOS技术的低中频调谐器IC的一部分。在功耗相似的情况下，在不显着降低其他性能标准（例如增益，噪声系数，共模抑制比等）的情况下，可以实现13dB IIP3的改善。这是通过应用一种新提出的差分电路gm“（跨导的二阶导数）抵消技术来实现的，该技术被称为差分多栅极晶体管（DMGTR）。在DMGTR放大器中，全差分放大器中gm”的负值可以是在适当大小和偏置的伪差分放大器中，通过gm的正值进行补偿。通过采用DMGTR，可实现低功率，高线性度的RF PGA。此外，为了获得宽广的增益范围和精细的步进分辨率，提出了一种新的RF PGA架构，该RF PGA的测量结果显示了50 dB的增益范围，0.25 dB的分辨率，4.5 dB的噪声系数，a-4-dBm IIP3（最大30 dBm）和25 dB的增益功耗为16mW。

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