Patent ID: 11972807
Assignee: SANDISK TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 15:
16. A non-volatile storage system, comprising:
a memory structure having a plurality of NAND strings and a plurality of word lines associated with the NAND strings;
a charge pump having a clock input configured to receive a clock signal, a power input configured to receive an input current, and an output, wherein the charge pump is configured to provide an output voltage at the output that depends on the clock signal; and
one or more control circuits in communication with the charge pump and the memory structure, the one or more control circuits configured to:
provide the output voltage to a word line in the memory structure;
determine a target duty cycle based on the output voltage as the output voltage is ramping to a threshold voltage;
generate a random duty cycle clock signal having an average duty cycle that over a time window is equal to the target duty cycle;
pass a constant frequency clock signal to the clock input of the charge pump when the random duty cycle clock signal has a high state while the output voltage is ramping to the threshold voltage; and
block the constant frequency clock signal from reaching the clock input of the charge pump when the random duty cycle clock signal has a low state while the output voltage is ramping to the threshold voltage.