Patent ID: 9245596
Filing Date: 2016-01-26
CPC Classification: G11C,H02M,H03K

Claim Text:
1. A charge pump system connected with a memory cell array and a reservoir capacitor, the charge pump system comprising: a logic circuit receiving a program enabling signal, wherein the logic circuit generates a first control signal according to a program cycle corresponding to the program enabling signal; a signal processing circuit receiving a pump enabling signal, and generating a second control signal and a third control signal, wherein the second control signal is activated by the signal processing circuit during a disabling period of the third control signal; a charge pump circuit, wherein an enabling terminal of the charge pump circuit receives the third control signal, and an output terminal of the charge pump circuit generates an output signal, wherein the output terminal of the charge pump circuit is connected with the memory cell array; a switching circuit, wherein a control terminal of the switching circuit receives the third control signal, a first terminal of the switching circuit is connected with the output terminal of the charge pump circuit, and a second terminal of the switching circuit is connected with a first terminal of the reservoir capacitor, wherein a second terminal of the reservoir capacitor is connected with a ground voltage; a first controllable discharge path, wherein a control terminal of the first controllable discharge path receives the first control signal, a first terminal of the first controllable discharge path is connected with the second terminal of the switching circuit, and a second terminal of the first controllable discharge path is connected with the ground voltage; and a second controllable discharge path, wherein a control terminal of the second controllable discharge path receives the second control signal, a first terminal of the second controllable discharge path is connected with the output terminal of the charge pump circuit, and a second terminal of the second controllable discharge path is connected with a first voltage.