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Amplitude-to-amplitude (AM-AM) and amplitude-to-phase (AM-PM) distortion are two significant effects in power amplifiers at high output power levels. Traditional measurement of amplitude and phase distortion in RF power amplifiers requires the use of expensive vector network analyzers (VNAs). This paper proposes a low cost and accurate test methodology for AM-AM and AM-PM measurement using distortion-to-amplitude...
Distortion effects of wideband power amplifiers vary significantly with carrier frequency and need to be tested and characterized across a specified (wide) frequency range during production. In this paper, a low cost test approach is presented that allows AM-AM and AM-PM distortion effects of RF power amplifiers to be evaluated at multiple frequencies with a single multi-tone test. The response of...
Design of a self compensating process variation tolerant RF low noise amplifier (LNA) is described. A novel non-intrusive mixing technique is proposed which enables minimal intrusion negative feedback in RF circuits making them process variation tolerant. The proposed design technique provides 18% yield improvement over comparable conventional LNA under severe process variation.
High peak-to-average ratio (PAR) of OFDM signals is a major bottleneck in the implementation of power efficient transmitters since the efficiency of a linear RF power amplifier reduce drastically due to backoff requirements. In this paper, a concurrent approach that uses adaptive baseband companding/ expanding of the OFDM signal along with dynamic PA biasing to achieve significant power savings in...
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