High frequency CMOS amplifier with improved linearity

Ali, M. Tanseer; Wu, Ruiheng; Mao, Luhong; Callaghan, Peter; Rapajic, P.B.

doi:10.1049/iet-cds.2013.0327

IET Circuits, Devices & Systems

2014

DOI: 10.1049/iet-cds.2013.0327

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High frequency CMOS amplifier with improved linearity

M. Tanseer Ali

Ruiheng Wu

Luhong Mao

et al.

Abstract: Abstract:In this paper, a novel amplifier linearization technique based on the negative impedance compensation is presented. As demonstrated by using Volterra model, the proposed technique is suitable for linearising amplifiers with low open-loop gain, which is appropriate for RF/microwave applications. A singlechip CMOS amplifier has been designed using the proposed method, and the simulation results show that high gain accuracy(improved by 38%) and high linearity (IMD 3 improved by 14dB, OIP 3 improved by 11… Show more

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Cited by 3 publications

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p th‐order inverse of the Volterra series for multiple‐input multiple‐output non‐linear dynamic systems

Rönnow

2018

IET Circuits, Devices & Systems

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A method to determine the pth-order inverse of the Volterra series of multiple-input multiple-output non-linear dynamic systems is presented; it combines time-and frequency-domain techniques to determine the Volterra series of the inverse as a function of the forward system's Volterra series. The method can be used for continuous and discrete time systems. Each operator of non-linear order n of the inverse is a function of the forward system's operators of non-linear order n and lower. It is shown that the pth-order post-inverse is equal to the pth-order preinverse. For the special case that there are no linear cross terms and that the linear memory effects are negligible the kernels of the forward and inverse models are approximately the same. In an example, an approximate inverse model of a model of a concurrent dual band radio frequency amplifier is derived.

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p th‐order inverse of the Volterra series for multiple‐input multiple‐output non‐linear dynamic systems

Rönnow

2018

IET Circuits, Devices & Systems

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Linearity enhancement of TVGA based on adaptive sweep optimisation in monostatic radar receiver

Almslmany

Wang

Cao

2015

International Journal of Electronics

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Linearization of High frequency Class E Feedback Amplifier using Negative Impedance Method

Sikder¹,

Ali

2021

AJSE

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This work represents a novel method of linearization of Switch Mode Power Amplifier (SMPA). For this purpose, class E SMPA was designed and analyzed both before and after applying a linearization technique known as Negative Impedance method. One of the major characteristics of a standard SMPA is that they poses high efficiency than their linear counterpart but on the other hand they show highly nonlinear characteristics. The motivation behind this work is to harness this highly efficient amplifier and make it linear which can very useful for various applications in RF communication fields. All the schematics and simulations that are presented in this paper was performed using Cadence Virtuoso environment using “Spectre” simulator tool. For active components, 280nm process technology was used under “gpdk90” pdk which based on BSIM3v3 model. Circuit was designed to run at 2GHz with 2.5 V supply voltage. A mathematical model is also presented using data found from the analysis, with the help of MATLAB. Linearity was measured using Input referred Intercept Point of 3rd order frequency (IIP3), which was improved from 3.7dBm to 17.86dBm with 57% percent efficiency providing an output power of 15.78dBm.

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High frequency CMOS amplifier with improved linearity

Cited by 3 publications

References 22 publications

p th‐order inverse of the Volterra series for multiple‐input multiple‐output non‐linear dynamic systems

p th‐order inverse of the Volterra series for multiple‐input multiple‐output non‐linear dynamic systems

Linearity enhancement of TVGA based on adaptive sweep optimisation in monostatic radar receiver

Linearization of High frequency Class E Feedback Amplifier using Negative Impedance Method

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