Abstract
This paper proposes a comparative study of regulation schemes for charge-pump-based voltage generators using behavioral models in Verilog- Analog Mixed Signal (AMS) code. An accurate and simple model of the charge pump is first introduced. It allows reducing the simulation time of complex electronic systems made up by both analog and digital circuits while maintaining a good agreement with transistor-level simulations. Finally, a comprehensive comparative study of the different regulation schemes for charge pumps is reported which allows the designer to choose the most suitable topology for a given application and Charge Pump (CP) operative zone.
Highlights
In the incoming scenario of the connected world, emerging applications such as the Internet-of-Things (IoT), the Wireless Sensor Networks (WSNs) and the Wireless Body Networks (WBNs) employ self-powered sensor nodes to gather data and share them with the other nodes [1,2,3].Systems on a Chip (SoCs), designed for these nodes, integrate several analog and digital electronic circuits targeted to execute a heterogeneous set of tasks
1, this paper aims to review their widely adopted regulation schemes and provides a design highlighted in Figure 1, this paper aims to review their widely adopted regulation schemes and tool for reducing simulation time and to choose the optimum the specific provides a design tool for reducing simulation time and toarchitecture choose the according optimum to architecture design constraints, which exploit according to the specific design constraints, which exploit Analog Mixed Signal (AMS) simulations
It is worth noting that, the rearranging strategy is the best solution in terms of area occupation, the pumping capacitance redistribution changes the operative zone of the Charge Pump (CP)
Summary
In the incoming scenario of the connected world, emerging applications such as the Internet-of-Things (IoT), the Wireless Sensor Networks (WSNs) and the Wireless Body Networks (WBNs) employ self-powered sensor nodes to gather data and share them with the other nodes [1,2,3]. The high-level view of the single circuit needs for Analog Mixed Signal (AMS) simulations that target the various features and modes [4,5,6]. CINT) value and, after its voltage the transistor voltage), the stored charge successively used tovoltage), start-up the converter, has reached athreshold target value The primary is locally which controls power the various sub-blocks orderto tothe preserve the maximum powerconverter transfer from the managed to obtain a precisely stable output voltage or to optimize power consumption in function of source to the load. Silicon substrate is when the output voltage is higher than the input one (boost topology), the converters based on Charge allowed thanks to the high storable energy densities of the capacitive components. By the switch-resistance model introduced insteady-state [24] and theand dynamic model inby [23], we find the using fundamental equations which describe transient, powerCP breakdown means can find the fundamental equations which describe transient, steady-state and power breakdown of settling time, output I/V characteristic (VOUT as function of IL ) and power conversion efficiency,by η, means of settling time,by: output I/V characteristic (VOUT as function of IL) and power conversion respectively expressed efficiency, η, respectively expressed by:
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