Charge-pump circuits: power-consumption optimization

Palumbo, G.; Pappalardo, D.; Gaibotti, M.

doi:10.1109/tcsi.2002.804544

Cited by 196 publications

(100 citation statements)

References 26 publications

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“…Two main paths are available to generate the high voltage; either a capacitive charge pump [19,20] or an inductive boost converter [21,22]. The requirements for high efficiency (low power) on one hand and no external components on the other are highly contradictive.…”

Section: Pulse Generation Strategymentioning

confidence: 99%

Ultra-low power transmit/receive ASIC for battery operated ultrasound measurement systems

Johansson

Gustafsson

Delsing

2006

Sensors and Actuators A: Physical

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AbsractThis paper describes the design of the complete transmit and receive electronics circuitry for a piezoelectric transducer in one single ASIC. The chip will be one building block in a thumb size battery operated ultrasound measurement system. The main design target has been to achieve extremely low power consumption while keeping the number of external components minimal.To overcome the dynamic range limitations imposed by a battery supply an on-chip boost converter uses one external inductor to generate up to 40 V for excitation of the transducer. The transducer itself is used as a storage capacitor, whereafter it is rapidly discharged to generate an ultrasound pulse. An on-chip amplifier with intermittent operation is controlled by a state machine and used to amplify incoming echoes. The chip has been fabricated in a 0.8 m high voltage CMOS process, with a total chip area of 12 mm 2 . Measurements verify the design approach. The power consumption for the system reaches within a factor of 2 of the power needed to charge the capacitance of the piezoelectric transducer from a fixed voltage source. The results show the possibility to achieve extremely low power consumption in a battery operated pulse-echo ultrasound measurement system.

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Section: Pulse Generation Strategymentioning

confidence: 99%

Ultra-low power transmit/receive ASIC for battery operated ultrasound measurement systems

Johansson

Gustafsson

Delsing

2006

Sensors and Actuators A: Physical

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“…Charge pumps are analog circuits which give an output voltage higher than the power supply [9,10] and they found typical applications in power IC's and nonvolatile memories.…”

Section: Behavioral Model Of Charge Pumpmentioning

confidence: 99%

Behavioral model of charge pumps with VHDL

Mita

Palumbo

Pennisi

2005

2005 12th IEEE International Conference on Electronics, Circuits and Systems

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A behavioral model of an N-stages charge pump is here presented. The description language used to develop the model is the VHDL thus permitting simulations of both digital and analog systems, such as nonvolatile memories. Moreover, the presented model allows a huge reduction in the simulation time also maintaining a good agreement with transistor level simulations. For a useful comparison, a three stages charge pump was simulated with Symphony EDA Sonata (event-driven VHDL simulator) and Spectre (transistor level simulator). The obtained result confirmed the validity of the developed description in terms of accuracy and low required simulation's time.

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“…In light of these, it is clear that the main challenge in SCC design is the optimization [9] of the converter parameters, while meeting various constraints on efficiency, silicon area and output voltage V DD . If, for instance, a traditional design approach is adopted, such as sizing the switches of the SCC to the same R ds(on) or, alternatively, adjusting it to allow operation in the complete charge transfer mode, one might end up with a non-optimal design.…”

Section: Introductionmentioning

confidence: 99%

Optimization of a multi-target voltages switched capacitor converter

Krihely

Ben‐Yaakov

Fish

2012

2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)

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Abstract-In this paper, an efficient voltage scalable switched capacitor converter (SCC) for 1.1V battery-powered system is presented. The SCC employs a binary resolution technique to step-down the input voltage to a range of voltages, while keeping the efficiency high. An optimization strategy for designing multitopology SCC is presented to improve the effectiveness of the circuit and to preserve efficiency over large load voltages.

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Charge-pump circuits: power-consumption optimization

Cited by 196 publications

References 26 publications

Ultra-low power transmit/receive ASIC for battery operated ultrasound measurement systems

Ultra-low power transmit/receive ASIC for battery operated ultrasound measurement systems

Behavioral model of charge pumps with VHDL

Optimization of a multi-target voltages switched capacitor converter

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