Kim B. Ostman

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This paper presents the analysis, design, and measurements of a 2.5-GHz receiver front-end in a 40-nm CMOS technology. The front-end utilizes RLC-resonator quality factor (Q) boosting and four-phase N-path filtering to improve the blocker filtering capabilities of the low-noise amplifier (LNA). Systematic analysis is performed in order to obtain a thorough(More)
Emerging digital-intensive receiver architectures require new methods for input matching design. In particular, closed-loop ΔΣ-based receivers inject discrete-time global feedback to the RF low-noise amplifier (LNA) output. When using feedback LNA topologies with local internal feedback, receiver input matching thus no longer depends only on(More)
This paper analyzes a tradeoff between noise figure, blocker filtering, and noise shaping that is inherent in the recently introduced direct delta-sigma receiver approach. It originates in the competing requirements imposed by the front-end low noise amplifier operating as a transconductor in an N-path G<sub>m</sub>C integrator and as a voltage(More)