Design of Integrated Bipolar Symmetric Output DC–DC Power Converter for Digital Pulse Generators in Ultrasound Medical Imaging Systems

Bondade, Rajdeep; Wang, Yikai; Ma, Dongsheng

doi:10.1109/tpel.2013.2264511

Cited by 15 publications

(5 citation statements)

References 7 publications

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“…Os conversores cc-cc elevadores empregados em conjunto com circuitos inversores também podem ser utilizados na geração dos campos elétricos intensos, com destaque para as topologias boost [17,18], buck-boost [19] e push-pull [20]. Entretanto, desvantagens também são percebidas neste tipo de solução, como a dificuldade de se obter elevado ganho de tensão a partir de uma fonte de valor reduzido, especialmente nas topologias sem transformador, pelos elementos parasitas dos componentes magnéticos, necessidade de controle do circuito, interruptores e drivers com elevada capacidade de isolação e limitação na variação de determinados parâmetros de pulsos devido aos valores fixos de componentes passivos, em especial dos indutores.…”

Section: Circuitos Geradores De Pulsos De Tensãounclassified

Gerador de Marx Bipolar Baseado em Topologia Full-Bridge Aplicado à Eletropermeabilização Biológica

Imai¹,

Weinert²,

Novaes³

2021

Revista Eletrônica de Potência

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Resumo -Este artigo apresenta um circuito Gerador de Marx (GM) bipolar, capaz de gerar pulsos com parâmetros elétricos destinados à eletropermeabilização biológica. Este procedimento consiste em aplicar campos elétricos intensos em tecidos vivos para a criação de poros em suas membranas celulares, e com isso otimizar procedimentos como introdução de medicamentos, transferência genética, fusão molecular e até acelerar a morte de um conjunto celular. É desenvolvido um GM bipolar capaz de obter tensão pulsada de 1200 V a partir de uma entrada em 300 V. O multiplicador de tensão se baseia em um sistema com capacitores conectados ora em paralelo e ora em série. Testes práticos foram realizados com uma amostra vegetal, a fim de analisar o funcionamento do gerador, explorando os múltiplos parâmetros ajustáveis proporcionados pelos circuitos.

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Section: Circuitos Geradores De Pulsos De Tensãounclassified

Gerador de Marx Bipolar Baseado em Topologia Full-Bridge Aplicado à Eletropermeabilização Biológica

Imai¹,

Weinert²,

Novaes³

2021

Revista Eletrônica de Potência

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“…High-voltage Lateral Diffused Metal Oxide Semiconductor Transistor (LDMOS) is very suitable for the applications of Smart Power Integrated Circuit [1,2,3,4,5,6,7,8]. Usually, p-channel LDMOS (pLDMOS) is very attractive in the full complementary high-voltage driver ICs [9,10,11,12,13,14]. However, due to low mobility of hole, the specific on-resistance (R on,sp ) is about 2-3 times larger than that of the n-channel LDMOS (nLDMOS).…”

Section: Introductionmentioning

confidence: 99%

Simulation study of an ultra-low specific on-resistance high-voltage pLDMOS with self-biased accumulation layer

Peng

Zhao

et al. 2020

IEICE Electron. Express

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In this letter, a high-voltage p-channel Lateral Diffused Metal Oxide Semiconductor Transistor (pLDMOS) with self-biased accumulation layer is proposed. A poly-silicon layer is formed on the thin insulator layer, which locates at the surface of the P-drift region. During on-state, an automatically obtained negative voltage is applied on the poly-silicon to induce a hole accumulation layer at the surface of the P-drift region. Therefore, the specific on-resistance (R on,sp) can be significantly reduced. Moreover, the permittivity of the gate insulator on the P-drift can be increased by selecting different insulator materials. Thus, the R on,sp can be further reduced due to more holes being accumulated at the surface of the P-drift. The simulation results shows that the R on,sp of the proposed pLDMOS can be dramatically reduced by 62.3% to 82.5% compared with that of the p-type Triple RESURF silicon limit. For the proposed pLDMOS, the transient Figure of Merit (FOM) is significantly improved by several to 10 times and the static Figure of Merit (FOM) is improved by several times compared with those of an Extended Gate pLDMOS (EG-pLDMOS) and a conventional pLDMOS.

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“…Such audio amplifiers are called as capacitor‐less or ‘capless’ amplifiers [1]. In [2], the bipolar output DC–DC converter can be reconfigured to an equivalent unipolar output DC–DC converter by shifting the power ground node. In [3], the converter uses few switches with zero voltage switching (ZVS) turned on.…”

Section: Introductionmentioning

confidence: 99%

“…Introduction: Nowadays, DC-DC converter with bipolar outputs is widely used in many applications, such as audio amplifier [1], ultrasound medical imaging systems [2] and some inverters [3]. In audio amplifier, single input bipolar outputs DC-DC converter which can generate symmetric bipolar outputs provides 'ground centred' outputs, therefore no high pass filter capacitor is needed.…”

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confidence: 99%

Soft‐switching step‐up/down DC–DC converter with bipolar outputs

Zhou

Chen³

et al. 2016

Electron. lett.

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A novel soft-switching step-up/down DC-DC converter is proposed, which generates symmetric bipolar outputs while maintaining the grounded capability. The proposed converter consists of a zeta converter cell and a buck-boost converter cell, sharing an inductor and a power switch. High efficiency is achieved by zero voltage switching for all switches. Meanwhile, by connecting one load between positive and negative output terminals, high voltage gain can be achieved. Experimental results of a 3.7 V battery input and ±10 VDC/10 W outputs prototype are presented to verify the analysis results of the proposed converter.

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Design of Integrated Bipolar Symmetric Output DC–DC Power Converter for Digital Pulse Generators in Ultrasound Medical Imaging Systems

Cited by 15 publications

References 7 publications

Gerador de Marx Bipolar Baseado em Topologia Full-Bridge Aplicado à Eletropermeabilização Biológica

Gerador de Marx Bipolar Baseado em Topologia Full-Bridge Aplicado à Eletropermeabilização Biológica

Simulation study of an ultra-low specific on-resistance high-voltage pLDMOS with self-biased accumulation layer

Soft‐switching step‐up/down DC–DC converter with bipolar outputs

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