Short-term Optimized Spread Spectrum Clock Generator for EMI Reduction in Switching DC/DC Converters

Pareschi, Fabio; Setti, Gianluca; Rovatti, Riccardo; Frattini, Giovanni

doi:10.1109/tcsi.2014.2327273

Cited by 31 publications

(23 citation statements)

References 26 publications

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“…S EMI,SS (f ). This guarantees that the variations of the modulation profile ξ (t) in the observation window are relevant enough and lead to an effective short-term spreading of EMI spectral energy and to spectral peak reduction in standard EMC compliance tests, as detailed in [20].…”

Section: B Periodic and Ss-modulated Emi Modellingmentioning

confidence: 91%

“…More recently, advanced SS techniques like the random and chaotic modulations [17]- [19], which provide better spectral characteristics and a smoother energy spreading around the switching frequency, have been proposed. As far as the power converters are concerned, further investigations have also been aimed to determine the impact of SS modulations on the converter performance like efficiency, output ripple and input current distortion [20]- [25]. Based on the results of SS research, many SS oscillator IC topologies have been proposed in recent literature and have been commercialized as standalone clock generators and also embedded into microprocessor/microcontroller units and integrated power converters [26]- [29].…”

Section: Introductionmentioning

confidence: 99%

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Interference of Spread-Spectrum Modulated Disturbances on Digital Communication Channels

Musolino

Crovetti

2019

IEEE Access

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In this paper, the effects of random spread spectrum (SS) electromagnetic interference (EMI) on digital communications are addressed. For this purpose, the influence of EMI on a communication channel is described in the framework of information theory in terms of an equivalent channel capacity loss, which is analytically predicted and validated by experimental results. The EMI-induced channel capacity loss for nonmodulated and SS-modulated interference generated by a switching-mode DC-DC power converter are then evaluated for different EMI and channel characteristics so that to compare different scenarios of practical interest.

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Section: B Periodic and Ss-modulated Emi Modellingmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Interference of Spread-Spectrum Modulated Disturbances on Digital Communication Channels

Musolino

Crovetti

2019

IEEE Access

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“…The frequency deviation and modulation frequency are determined by the allowed radiated power or radio disturbance [5], [6]. For example, the SSCGs used in the switching power converter [22], [23] and class-D power amplifier [24, [25] have the frequency deviation ratio of 4-30% and modulation frequency of 1-60 kHz. Therefore, the proposed SSCG with programmable modulation capability as well as a fine frequency resolution can also be applied to these applications.…”

Section: B Multipurpose Operationmentioning

confidence: 99%

A Spread Spectrum Clock Generator Using a Programmable Linear Frequency Modulator for Multipurpose Electronic Devices

Ryu

Park

Sung

et al. 2015

IEEE Trans. Electromagn. Compat.

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This paper presents a fractional-N phase-locked loop based spread spectrum clock generator (SSCG) using a programmable linear frequency modulator. The SSCG provides a programmable frequency deviation and modulation frequency regardless of its operating frequency. The ranges of frequency-deviation ratio and modulation frequency are 0-80% and 0-100 kHz with 610 Hz step resolution. The proposed SSCG successfully support five serial-link standards by using a single SSCG, and can be applied to various switching circuits such as class-D power amplifiers or switching power converters. The EMI reduction was measured to be 10.24-13.94 dB under 100-kHz resolution bandwidth. The proposed SSCG was fabricated using a 0.13-μm CMOS process with an active area of 0.11 mm 2 , while consuming an overall power of 6.28 mW at 1 GHz. Index Terms-EMI reduction, frequency modulation, phase locked loop (PLL), spread spectrum clock generator (SSCG). 0018-9375Sangyong Park (S'11) received the B.S. and M.S. degrees from the School of Electrical Engineering, Chung-Ang University, Seoul, South Korea, in 2011 and 2013, respectively. He is currently working toward the Ph.D. degree at the School of Electrical Engineering, Chung-Ang University.His research interests include delta-sigma modulators, the design of linear regulators for wireless communication, and clock and data recovery circuits for high speed communication using CMOS technology.Eun-Taek Sung (S'14) received the B.S. degree from the School of Electrical Engineering, Chung-Ang University, Seoul, South Korea, in 2014. He is currently working toward the M.S. degree at the School of Electrical Engineering, Chung-Ang University.His research interests include the design of lowpower and energy-efficient sensor interfaces, data converters, and high performance clock generators for wireless sensor networks.Seung-Gi Lee received the B.S. degree from the School of Electrical Engineering, Chung-Ang University, Seoul, South Korea, in 2015. He is currently working toward the M.S. degree at the School of Electrical Engineering, Chung-Ang University.His research interests include the design of linear regulators, high power amplifier, and CMOS RF transceiver design for the wireless communication. DonghyunBaek (S'98-M'07-SM'13) received the B.S., M.S., and Ph.D. degrees from the

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“…Chaotic PWM is to suppress EMI based on modulation technology of power converters, which has the advantages of no increase of external hardware and no increase of the volume, weight, and cost of power converters [8][9][10][11]. Thus, chaotic PWM has been studied extensively and lots of valuable achievements have been obtained [12][13][14][15][16][17][18][19]. Different chaotic PWMs have been applied to various types of power converters to suppress conducted EMI, such as DC-DC converters, AC-DC converters, motor drive systems, etc., which not only can effectively reduce the peaks of EMI, but also largely reduce the volume and cost of the EMI filters in power converters [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…Thus, chaotic PWM has been studied extensively and lots of valuable achievements have been obtained [12][13][14][15][16][17][18][19]. Different chaotic PWMs have been applied to various types of power converters to suppress conducted EMI, such as DC-DC converters, AC-DC converters, motor drive systems, etc., which not only can effectively reduce the peaks of EMI, but also largely reduce the volume and cost of the EMI filters in power converters [12][13][14][15]. The chaotic spectrum calculation method with chaotic PWM of power converters have been presented in the literature [16,17].…”

Section: Introductionmentioning

confidence: 99%

Continuous Multi-Scroll Chaotic PWM and its Chaotic Signal Selection Method for EMI Suppression of Power Converters

Yang

Ding

et al. 2020

IEEE Access

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Chaotic pulse width modulation (PWM) technique has been applied to suppress electromagnetic interference (EMI) in power converters. However, traditional discrete chaotic PWM has the shortcoming that the spreading spectrum distribution is triangular in shape and the practical spreading frequency bandwidth is much larger than the designed, which will further result in the limited EMI suppression. In this paper, a continuous chaotic PWM method based on the continuous multi-scroll chaotic attractors is put forward to suppress EMI more effectively, getting better spread spectrum distribution at switching frequency and its multiples for power converters. Moreover, to guide the selection of chaotic signals in real applications, the influence mechanism of multi-scroll chaotic signals on EMI spectrum distribution is firstly analyzed in this paper so as to provide a practical chaotic signal selection method. Finally, the experiments are presented followed by the simulations on a boost converter to verify the effectiveness of the proposed continuous multi-scroll chaotic PWM method and the correctness of the given chaotic signal selection method. This paper provides design guidance for the chaotic PWM in engineering applications. INDEX TERMS Electromagnetic interference, power converters, chaotic pulse width modulation, multiscroll chaotic attractors, spectral characteristics.

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Short-term Optimized Spread Spectrum Clock Generator for EMI Reduction in Switching DC/DC Converters

Cited by 31 publications

References 26 publications

Interference of Spread-Spectrum Modulated Disturbances on Digital Communication Channels

Interference of Spread-Spectrum Modulated Disturbances on Digital Communication Channels

A Spread Spectrum Clock Generator Using a Programmable Linear Frequency Modulator for Multipurpose Electronic Devices

Continuous Multi-Scroll Chaotic PWM and its Chaotic Signal Selection Method for EMI Suppression of Power Converters

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