Charge pump high-speed detection circuit and method

[0034] Such as figure 2 As shown, the present invention proposes a high-speed detection circuit of a charge pump, including a timing control circuit, a charge transfer circuit, a comparator, and also includes a fixed capacitor, an adjustable capacitor, and the first, third, fourth, and sixth switches; the output of the timing control circuit The timing control signal is sent to the charge transfer circuit, the output end of the charge transfer circuit is connected to one end of the fixed capacitor through the sixth switch; the other end of the fixed capacitor is connected to one end of the adjustable capacitor, the other end of the adjustable capacitor is grounded, and the two ends of the fixed capacitor Grounded through the first and third switches respectively; the common terminal of the fixed capacitor and the adjustable capacitor is connected to the reference voltage pin of the comparator through the fourth switch; the comparator collects the voltage value output by the fo...

[0038] Such as image 3 As shown, the present invention also proposes another embodiment of the charge pump high-speed detection circuit, which differs from the first embodiment in the number and position of switches. It also includes a second switch and a fifth switch, the fifth switch is respectively connected to one end of the adjustable capacitor and the other end of the fixed capacitor; one end of the second switch is connected to the other end of the fixed capacitor, and The other end is grounded. The first, second, and third switches are turned on and off at the same time, when the first, second, and third switches are turned off, the fourth, fifth, and sixth switches are turned on; when the first, second, and third switches are turned on, The fourth, fifth and sixth switches are closed.

[0039]The working principles of the circuits in the above two embodiments are as follows: Assume that the switch marked T1 next to the switch in the figure is turned on at time T1, ...