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Conference Paper
Generation Method of a Driving Signal for a Dual-mode Supply Modulator in a 3-level Envelope Delta-sigma Modulator Transmitter
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- Authors
- Sung Jun Lee, Young-Kyun Cho, Jae Ho Jung
- Issue Date
- 2014-10
- Citation
- European Microwave Conference (EuMC) 2014, pp.1012-1015
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- A generation method of a driving signal for a dual-mode supply modulator (DMSM) that supplies dual dc supply voltages to a power amplifier (PA) in a 3-level envelope delta-sigma modulator (EDSM) transmitter is proposed and confirmed by simulation and measurement. This method is feasible in terms that it generates a DMSM driving signal of trackable speed by the DMSM through a real-time operation in the digital domain. Also, this method is suitable in terms that an intended relation between the DMSM driving signal and the output of a 3-level EDSM can be obtained, provided the design parameter of a lowpass delta-sigma modulator (LPDSM), out of band gain, is kept low (~1.5). And, it is also shown that this condition for the design parameter of a LPDSM is not a limitation because it does not degrade the performance of the 3-level EDSM.
- KSP Keywords
- 3-Level, Dc supply, Delta-Sigma Modulator, Driving signal, Out of Band gain, Simulation and measurement, design parameters, digital domain, dual-mode supply modulator(DMSM), power amplifiers(PAs), real-time operation