A digitally controlled DC/DC converter for an RF power amplifier

Yousefzadeh, Vahid; Wang, Narisi; Popović, Zoya; Maksimović, Dragan

doi:10.1109/tpel.2005.861156

Cited by 82 publications

(20 citation statements)

References 17 publications

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“…The linear regulator is supplied by the multilevel converter and, depending on the current voltage level on its input and output, its efficiency will vary. If the transmitted signal codification is known (CDMA for example) [15], it is possible to optimize the multilevel cell's voltage and the number of levels, as explained in [1]. …”

Section: Proposed Topologymentioning

confidence: 99%

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Comparison of two different cell topologies for a multilevel power supply to achieve high efficiency envelope amplifier

Díaz

Vasić

Alou

et al. 2009

2009 IEEE Energy Conversion Congress and Exposition

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Section: Proposed Topologymentioning

confidence: 99%

“…To carry out experimental measurements a sinusoidal waveform has been used. A CDMA signal, despite it was not available for experimental verifications, has been chosen to apply the theoretical calculations to a telecommunications signal, as it is known the amplitude density probability [15].…”

Section: Introductionmentioning

confidence: 99%

Comparison of two different cell topologies for a multilevel power supply to achieve high efficiency envelope amplifier

Díaz

Vasić

Alou

et al. 2009

2009 IEEE Energy Conversion Congress and Exposition

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“…The most popular one is based on the frequency domain [1], [2]. In this case, an analog controller is first derived and is then transformed to the discrete form by one of the continuous domain to the discrete domain transformations, such as ZOH, p-z matched, etc.…”

Section: Introductionmentioning

confidence: 99%

Time Domain Identification of PWM Converters for Digital Controllers Design

Peretz

Ben‐Yaakov

2007

2007 IEEE Power Electronics Specialists Conference

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-A discrete time-domain based system identification method for PWM DC-DC converters is presented. The proposed procedure is capable of successfully reconstructing the system's model from an arbitrary excitation at the command input. In this study, a step perturbation was applied, which is simple to apply and has an intuitive interpretation of the output response. The effects of switching and quantization noise were overcome by choosing the sampling instance to be after the switching oscillations decay significantly and by averaging the responses of synchronously perturbed sequences. The proposed method was evaluated on Buck and Boost converters. The digital data acquisition procedure was implemented on a TMS320F2407 DSP core. Excellent agreement was found between simulations and experimental results.

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“…Several papers have proposed solutions for similar application using either analogue or digital control schemes [1][2][3][4]. The output voltage and power ranges of the different solutions previously published vary largely and it is therefore hard to make comparisons.…”

Section: Introductionmentioning

confidence: 99%

“…The output voltage and power ranges of the different solutions previously published vary largely and it is therefore hard to make comparisons. Reference [1] presents a combination of a digitally controlled DC/DC converter and an RFPA for battery powered applications. The DC/DC converter does not track the envelope of the RF output but is used to optimize the DC supply voltage to achieve maximum efficiency.…”

Section: Introductionmentioning

confidence: 99%

Digitally controlled envelope tracking power supply for an RF power amplifier

Jakobsen

Andersen

2007

INTELEC 07 - 29th International Telecommunications Energy Conference

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-A new Digital Self-Oscillating (DiSOM) modulator is presented in this paper. The advantage of the DiSOM is that it allows the sampling frequency of the digital compensator to be higher than the switching frequency, but it also has the ability to shape the quantization noise on the switching output due to clock frequency quantization. An envelope tracking power supply for an RF Power Amplifier (RFPA) can help improve system efficiency by reducing the power consumption of the RFPA. To show the advantage of the DiSOM over traditional counter based Digital PWM modulators two designs were compared in both simulation and by experiment. The results shows that the DiSOM could give an increase in open loop bandwidth by more than a factor of two and an reduce the closed loop output impedance of the power supply by a factor of 5 at the output filter resonance frequency.

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A digitally controlled DC/DC converter for an RF power amplifier

Cited by 82 publications

References 17 publications

Comparison of two different cell topologies for a multilevel power supply to achieve high efficiency envelope amplifier

Comparison of two different cell topologies for a multilevel power supply to achieve high efficiency envelope amplifier

Time Domain Identification of PWM Converters for Digital Controllers Design

Digitally controlled envelope tracking power supply for an RF power amplifier

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