Conference Proceeding

A 1.5V four phase switched polarity charge pump

08/2009; DOI:10.1109/ICCCAS.2009.5250412 pp.688 - 692 In proceeding of: Communications, Circuits and Systems, 2009. ICCCAS 2009. International Conference on
Source: IEEE Xplore

ABSTRACT A four phase switched polarity charge pump using 0.13 mum triple well CMOS technology is presented. The architecture takes advantage of the threshold voltage cancellation scheme in the conventional four phase Dickson charge pump. With the body control technique, the body effect is eliminated. The charge transfer unit is shared in positive and negative operation, which makes the design more compact. Simulation results show that the proposed 5-stage charge pump can reach +8.22 V/-8.05 V (ideal: +9 V/-9 V) with 10% of total capacitance as estimated parastics, and the output indicates good linearity with respect to the increase of stages.

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Keywords

body control technique
 
charge transfer unit
 
compact
 
four phase
 
negative operation
 
parastics
 
polarity charge pump
 
threshold voltage cancellation scheme