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In this paper, a new measure that accounts for the nonlinearity of radio frequency power amplifiers RFPAs is defined. The new measure — referred to herein as the Desensitization Point — is used to characterize the nonlinear behaviour of RFPAs when two in-band unequal tones are applied to the amplifier input; a strong (blocker) signal features more amplifier gain as opposed to a weak nearby signal,...
In this paper, a design for a quadband linear/efficient class-AB power amplifier, with an output power exceeding 10-watts in all four bands is presented. The designed power amplifier - based on a GaN HEMT- provides a power added efficiency over 47% in all four bands. Source/load-pull simulations are used for optimum matching at each band; quadband stub-based matching is used for input matching whilst...
A 100 Gb/s CMOS transimpedance amplifier (TIA) for high speed optical communication receivers is presented in this paper. The TIA is based on a differential architecture and composed of a regulated cascode block and a differential amplifier with active feedback. It adopts peaking inductors and a capacitive degeneration scheme to increase the bandwidth. The TIA is designed and laid out in CMOS 65 nm...
In this paper, a method for adapting conventional controller are used to adapt an adaptive parametric black box controller (APBB). The APBB controller will be adapted such that the plant should follow a desired trajectory which is given by a reference model. The parameters of APBB controller are estimated by using recursive least square method. The estimation goal is for the parameters to converge...
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