Charge pump circuit based on multipath non-overlapped clock

Abstract

A charge pump circuit based on a multipath non-overlapped clock belongs to the field of electronic circuit technology. A reference ground potential generating unit is used for generating a reference ground potential. The control signal of a level converting unit is a clock control signal and is used for generating a clock output signal. An input signal of a four-phase non-overlapped clock generating unit is a clock output signal and is used for generating a first non-overlapped clock signal, a second non-overlapped clock signal, a third non-overlapped signal and a fourth non-overlapped signal.A charge pump unit is obtained through parallelly connecting two one-stage charge pumps. Two first-stage charge pumps are respectively controlled by the first non-overlapped clock signal, the secondnon-overlapped clock signal, the third non-overlapped clock signal and the fourth non-overlapped clock signal for alternatively driving charging and increasing power voltage of the charging pump unitand generating output voltage of the charge pump circuit. The charge pump circuit has advantages of eliminating circuit shortcircuit, eliminating threshold loss caused by a body effect, reducing ripple, and improving charging efficiency of the charge pump.

Description

technical field [0001] The invention belongs to the technical field of electronic circuits and relates to a charge pump circuit based on multiple non-overlapping clocks. Background technique [0002] At this stage, with the widespread use of memory, the writing and erasing of data requires an operating voltage much higher than the power supply voltage. Therefore, a charge pump can be used to obtain a high operating voltage through a lower power supply voltage. Multi-stage charge pump There are problems such as efficiency loss and large ripple at each stage, and there is a collusion phenomenon in the traditional cross-coupled charge pump. The collusion phenomenon is the branch circuit leakage phenomenon of the charge pump during the turn-on and turn-off process of the MOS transistor. Contents of the invention [0003] Aiming at the problems of the above-mentioned collusion phenomenon in the traditional cross-coupled charge pump and the efficiency loss and large ripple of ea...

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Problems solved by technology

[0003] Aiming at the problems of the above-mentioned collusion phenomenon in the traditional cross-coupled charge pump and the efficiency loss and large ripple of each stage in the multi-stage charge pump, the present invention proposes a charge pump circuit, which controls the charge pump unit based on multiple non-overlapping clocks , can solve the above shortcomings of the traditional charge pump, effectively avoid the occurrence of collusion phenomenon, eliminate the threshold loss caused by the body effect and reduce the ripple, and improve the charging efficiency of the charge pump

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