A Standard-Cell-Based All-Digital PWM Modulator With High Resolution and Spread- Spectrum Capability

Martino, Michele De; De, Davide; Esposito, Darjn; Napoli, Ettore; Petra, Nicola; Strollo, A.G.M.

doi:10.1109/tcsi.2018.2852682

Cited by 19 publications

(4 citation statements)

References 32 publications

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“…Esto se traduce en problemas de ciclos límite. Para solucionar este problema de generar ciclos limite, [15] propone una arquitectura en el que utiliza un bloque para medir con un oscilador libre ("free running oscilator") y poder ajustar más la salida de la señal con mayor precisión.…”

Section: Tecnología Asicunclassified

Design and Implementation of Two Hybrid High Frequency DPWMs Using Delay Blocks on FPGAs

Fernandez-Gomez

Sanchez²,

Castro³

et al. 2021

IEEE Trans. Power Electron.

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Section: Tecnología Asicunclassified

Design and Implementation of Two Hybrid High Frequency DPWMs Using Delay Blocks on FPGAs

Fernandez-Gomez

Sanchez²,

Castro³

et al. 2021

IEEE Trans. Power Electron.

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“…De Matino M. et al generated a pulse waveform by counting a DDS-generated clock periods. However, the pulse width resolution was limited to the period of the counting clock [17]. Morales J. I. et al proposed a pulse generating circuit based on a digitally controlled delay element to achieve a variable time interval of up to 54 ps [18].…”

Section: Introductionmentioning

confidence: 99%

Metrology and Measurement Systems

Liu,

Fu,

Kong

et al. 2021

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Adjustable-width pulse signals are widely used in systems such as test equipment for hold time, response time and radar testing. In this study, we proposed a pulse generation method based on virtual sampling with ultra-high pulse width resolution. In the proposed method, the sampling rate of a digital-to-analogue converter (DAC) was adjusted to considerably improve pulse width resolution. First, the sampling rate was matched with the target pulse width resolution to digitally sample the ideal signal and generate digital waveform sampling points. Next, the signal bandwidth of the DAC was matched using a low-pass digital filter. Finally, the waveform sampling points were downsampled using an integer factor and output after digital-to-analogue conversion. The waveform pulse width information generated by high-frequency digital sampling was passed step by step and retained in the final output analogue signal. A DAC with a sampling rate of 1.25 GSa/s was used, and the pulse width resolution of the pulse signal was 0.1 ns. Theoretically, a sampling rate of 10 GSa/s is required to achieve 0.1 ns resolution. This method is simple, has a low cost, and exhibits excellent performance.

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“…For this purpose, several approaches have been proposed in recent years to mitigate EMI [12][13][14][15][16]. Among them, Spread-Spectrum (SS) techniques, which consist in the modulation of the frequency of switching signals around the nominal value, so that to spread their spectral energy over a wider bandwidth [17,18], are often adopted in clock oscillators [19][20][21][22][23] and DC-DC converter controllers [24][25][26][27] since they give rise to a significant (10-20 dB) reduction of EMI spectral peaks measured following EMC standards [8][9][10][11] and make it possible to meet EMC requirements at low cost. In this field, chaos-based random SS-modulations have proven to achieve the best spectral characteristics [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Interference of Spread-Spectrum EMI and Digital Data Links under Narrowband Resonant Coupling

Crovetti

Musolino

2020

Electronics

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In this paper, the effects of electromagnetic interference (EMI) coupled to a radio-frequency (RF) communication channel by resonant mechanisms are investigated and described in the framework of Shannon information theory in terms of an equivalent channel capacity loss so that to analyze and compare the effects of non-modulated and random Spread Spectrum (SS) modulated EMI. The analysis reveals a higher EMI-induced capacity loss for SS-modulated compared to non modulated EMI under practical values of the quality factor Q, while a modest improvement in the worst case capacity loss is observed only for impractical values of Q. Simulations on a 4-quadrature amplitude modulation (4-QAM) digital link featuring Turbo coding under EMI resonant coupling reveal that SS-modulated EMI gives rise to higher bit error rate (BER) at lower EMI power compared non-modulated EMI in the presence of resonant coupling for practical values of Q, thus suggesting a worse interfering potential of SS-modulated EMI.

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A Standard-Cell-Based All-Digital PWM Modulator With High Resolution and Spread- Spectrum Capability

Cited by 19 publications

References 32 publications

Design and Implementation of Two Hybrid High Frequency DPWMs Using Delay Blocks on FPGAs

Design and Implementation of Two Hybrid High Frequency DPWMs Using Delay Blocks on FPGAs

Metrology and Measurement Systems

Interference of Spread-Spectrum EMI and Digital Data Links under Narrowband Resonant Coupling

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