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This paper focuses on the practical aspects of the realisation of Dickson and Fibonacci charge pumps. Standard Dickson charge pump circuit solution and new Fibonacci charge pump implementation are compared. Both charge pumps were designed and then evaluated by LTspice XVII simulations and realised in a discrete form on printed circuit board (PCB). Finally, the key parameters as the output voltage, efficiency, rise time, variable power supply and clock frequency effects were measured.

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This paper focuses on the practical aspects of the realisation the Fibonacci charge pump (FCP). The main attention is dedicated to the study of the influence of clock frequency and the capacitance of the used capacitor to key parameters of proposed FCP. This studying is performed by measurement of four specimens of FCP with different values of capacitance and clocking frequency. The rationalisation increases the efficiency to 85 % approximately (for VIN = 3 V, VOUT = 34.3 V, IOUT = 1 mA). The results of this work allow rational selection of capacitance in relation to requested parameters of the designed charge pump.

Charge pump is circuit that produces voltage higher than supply voltage or negative voltage. Today, charge pumps became an essential parts of electronic equipment. The integration of charge pumps directly into the target system allows manufacturers to feed a complex system with many specific power requirements from a single source. However, charge pump efficiency is relatively small. This paper is devoted to questions of efficiency of presented variant of charge pump. Thus efficiency as dependence on number of stages, clock frequency, output current and MOSFETs sizes of presented charge pump was simulated. The aim of this study is determination of MOSFETs sizes and theirs influence to efficiency and output voltage. Complex optimization of this circuit will follow in the next period.