Multi-charge-pump system capable of optimizing power consumption

Abstract

The invention discloses a multi-charge-pump system capable of optimizing power consumption. The multi-charge-pump system comprises a clock driving module, a coupling capacitor module, a controllable switch module, and a one-way transmission gate module, wherein the clock driving module is used for dividing a clock input signal into multiple paths to increase driving capability thereof; the coupling capacitor module is used for coupling voltage change of a clock driven by the clock driving module to the input end of the controllable switch module; the controllable switch module is used for connecting the multiple paths of clock voltage changes transmitted by the coupling capacitor module to the clock input end of the one-way transmission gate module under control of multiple control signals; and the one-way transmission gate module is used for converting the clock alternating current voltage output by the controllable switch module into one-way direct current to be output. By virtue of integration of module circuits with same functions and structures of each charge pump, and allocation to corresponding output charge pumps according to requirements, the total requirement on clock driving sub circuits and the coupling capacitor is lowered, and lowering of power consumption is realized.

Description

technical field [0001] The invention relates to a multi-charge pump system, in particular to a multi-charge pump system with optimized power consumption. Background technique [0002] figure 1 Shown is a multi-charge pump system with two charge pumps PUMP1 and PUMP2, each of which has an independent clock drive module BUF1 / BUF2, coupling capacitor C1 / C2 and one-way transmission gate (TRANSFER GATE) T1 / T2, The clock drive modules BUF1 / BUF2 and coupling capacitors C1 / C2 of different charge pumps have the same structure but may have different sizes, but the one-way transmission gate (TRANSFER GATE) T1 / T2 usually has a different structure, and all charge pumps PUMP1 / PUMP2 use the same The clock signal CLK, VOUT1 and VOUT2 are outputs of different charge pumps. [0003] Table 1 exemplifies the respective load levels of VOUT1 and VOUT2 in different application modes MODE1, MODE2, and MODE3 of the multi-charge pump system. In order to meet the load requirements of the two charge...

AI Technical Summary

Problems solved by technology

In order to meet the load requirements of the two charge pumps in all modes, the design index (SPEC) of each charge pump needs to be able to meet the maximum load conditions in different modes, that is, VOUT1 design load = max{3,1,3} =3; VOUT2 design load=max{1,4,0}=4, therefore, the whole system needs to be designed to achieve a design load of 3+4=7, usually the design load is positively correlated with the driving clock and coupling capacitor, so correspondingly 3 +4=7 units of clock drive module BUF and coupling capacitor C, but in fact, the load sum of the two charge pumps is only 5 in the maximum load mode MODE2, that is, only 5 units of clock drive module BUF and coupling capacitor C are required, the minimum In mode MODE3, the load sum of the two charge pumps is only 3, that is, only 5 units of clock drive module BUF and coupling capacitor C are needed, and the total clock drive module BUF and coupling capacitor C of the two charge pumps are designed to be 7 units, resulting in clock drive Waste of module BUF and coupling capacitor C in some application modes

Images