Phase-accumulator based multi-channel high-precision digital PWM architecture

Meuth, H.; Janiszewski, I.; Schade, K.

doi:10.1109/freq.2005.1574011

Cited by 4 publications

(3 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The refresh rate of this PWM thus generated by the frequency word, instead of counter width. One of advantage of employing accumulator is the possibility of generating variable phase PWM, which is known as Phase-Accumulator PWM [5]. Further exploration discovers the implementation of accumulator for optimized design of multichannel PWM in devices with RAM blocks, as presented in this paper.…”

Section: Traditional Pulse Width Modulator (Pwm)mentioning

confidence: 97%

Architecture of RAM-Accumulator based Multichannel Digital PWM

Hermawan

2017

JAREE

View full text Add to dashboard Cite

Traditional counter based digital Pulse Width Modulator (PWM) has been a straightforward architecture. However, realization of multichannel PWM with such design requires considerable logic gates. A novel architecture of multichannel PWM based on the usage of RAM block and frequency word accumulator is proposed. This architecture is capable of producing numerous channels while maintaining its performance. The design was tested in Microsemi SmartFusion A2F200 Customizable System on Chip, giving the result of 7.73% FPGA usage to produce 48 channels of 380Hz 16 bits PWM. The output performance for test application is acceptable.

show abstract

Section: Traditional Pulse Width Modulator (Pwm)mentioning

confidence: 97%

Architecture of RAM-Accumulator based Multichannel Digital PWM

Hermawan

2017

JAREE

View full text Add to dashboard Cite

show abstract

“…A variable frequency PWM can be digitally generated in several ways, as reported in the literature. It can be implemented using a counter and a comparator, as in on-chip timer peripherals available in microcontrollers and Digital Signal Processors (DSPs), or using a phase-accumulator and a comparator [4]. The latter has several advantages as pointed out in [4], and its hardware complexity is not bigger than that of the former.…”

Section: Introductionmentioning

confidence: 99%

“…It can be implemented using a counter and a comparator, as in on-chip timer peripherals available in microcontrollers and Digital Signal Processors (DSPs), or using a phase-accumulator and a comparator [4]. The latter has several advantages as pointed out in [4], and its hardware complexity is not bigger than that of the former. One advantage of the phase-accumulator based PWM (PAB-PWM) is that it operates in the frequency domain, i.e.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Acoustic Noise Spectrum of Domestic Induction Heating Systems Controlled by Phase-Accumulator Modulators

Villa

Artigas

Beltrán

et al. 2019

IEEE Trans. Ind. Electron.

View full text Add to dashboard Cite

In domestic induction heating (IH) applications, the modulation technique applied to the inverter has a high influence on the acoustic noise emissions. These noise emissions must be avoided since they may be audible and annoying to the final user. This paper analyzes the acoustic noise emissions that appear when a series half-bridge resonant inverter is operated with a phaseaccumulator based modulator. This modulation technique has the advantage of operating in the frequency domain, and it is compared with the classical PWM modulator regarding the audible noise generated. The frequencies of the tones in the acoustic noise spectrum are theoretically calculated from the parameters of the phase-accumulator based modulator. The SFM (Spectral Flatness Measure) is used to quantify the number of cases in which tones are generated by the modulation. Two techniques are applied to the phase-accumulator based modulator and their effect is tested. Theoretical results are experimentally verified.

show abstract