CMOS SFFDS PA with coupled transformer for high power RF applications

Luque, Yohann; Kerhervé, Eric; Deltimple, Nathalie; Belot, Didier

doi:10.1109/iscas.2009.5118005

Cited by 1 publication

(1 citation statement)

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“…In this study, to solve the size issues of the driver stages of the typical CSC structure, we proposed a CSC structure with an APR. Although the idea of a stacking structure to reduce power consumption has been explored in many previous works, the stacking structures designed in those previous works were realized in the power stages [24], [25]. In most previous works related to stacking structures, the output power levels of the stacked power stages were combined using current-or voltagecombining methods; the input signal of the power stages were identical.…”

Section: Discussionmentioning

confidence: 99%

A Current-Shared Cascade Structure With an Auxiliary Power Regulator for Switching Mode RF Power Amplifiers

Hwang¹,

Lee²,

Park³

et al. 2014

IEEE Trans. Microwave Theory Techn.

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In this study, we propose an auxiliary power regulator (APR) for the current-shared cascade (CSC) structure of the driver stages of RF CMOS power. Although the CSC structure provides a method to reduce the power consumption at the driver stages of a differential power amplifier (PA), it is difficult to obtain optimum levels of effective supply voltage for the first and second driver stages. Additionally, the transistor sizes of the first and second driver stages of the CSC structure must be identical to ensure the proper operation of the PA. Thus, in this work, we propose an APR structure that ensures the proper operation of a PA with different transistor sizes in its first and second driver stages. To prove the feasibility of the proposed technique, we designed the PA with a CSC structure using an APR. From the measured results, we successfully verify the feasibility of the proposed structure. Additionally, we provide experimental results for a typical CMOS PA to determine the optimum supply voltage for the second driver stage.

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Section: Discussionmentioning

confidence: 99%