Study and design of charge pump circuit for low power application by using modified dickson charge pump with inductor technique

Abstract

The charge pump and ring oscillator are studied and found that the charge pump must have both newlinelow power and high efficiency because in the applications like nonvolatile memory such an newlineEEPROM and flash memories, mobile applications it is vital that the current consumption should newlinebe minimal because the battery power is limited. Charge Pump is a crucial component in the newlineexploding field of nonvolatile memory also used in white LED driver, solar cell, PDA and high newlinevoltage needed applications for on-chip designs. Although Charge Pump is widely used, the design newlineis still quite tricky, since it involves many trade-offs regarding the efficiency attainable, power, newlineperformance and small area. The development of the efficient and reliable design of the charge newlinepump is therefore of great importance. In this report, a quotDESIGN OF LOW POWER CHARGE newlinePUMP WITH INDUCTOR TECHNIQUESquot using 0.18µm technology is designed having low newlinepower dissipation blocks, i.e. Ring oscillator, DFF and Level Shifter Block which consumes low newlinepower and MOS capacitor which requires small area. This new approach gives maximum voltage newlineand superior rise-time than existing designs. The ripple produces a voltage in the output voltage newlineand current spike, reduced by using an inductor, the previous MOS based Dickson charge pump newlinerequired maximum numbers of stage, to obtain desired voltage, moreover advantage of this design newlinetechnique using inductor reduce numbers of stages up to 50%, which saves both power and area. newlineThey have used integrated spiral square shape inductor; it is designed using metal wire on-chip. newlineIn this thesis, we have proposed three proposed circuit techniques which is main constraints is newlinearea, power and efficiency. The circuit design allows the implementation of a low power charge newlinePump using a small device and less stage. Thus, this is an attractive design approach for low power newlinemodified Dickson Charge Pump using an integrated spiral inductor. Dickson charge pump using newlinetwo inductor-based techniques with improved efficiency up to 80-98% by the low val