Patent ID: 11927635
Assignee: SANDISK TECHNOLOGIES, INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 7:
8. A system for determining charge pump efficiency, comprising:
a first charge pump;
a charge pump under test (PUT) configured to be cascaded to the first charge pump;
a clock generator; and
a charge pump test controller configured to:
control a first charge pump clock signal generated by the clock generator and provided to the first charge pump in order to supply a predetermined output current to a load connected to the first charge pump;
determine a first number of clock edges of the first charge pump clock signal over a first period of time that the predetermined output current is drawn by the load;
control a second charge pump clock signal generated by the clock generator and provided to the first charge pump after the PUT is cascaded to the first charge pump, the control of the second charge pump clock signal controlling an output current generated by the first charge pump;
determine a second number of clock edges of the second charge pump clock signal over a second period of time having substantially the same duration as the first period of time; and
determine the efficiency of the PUT based on the first number of clock edges and the second number of clock edges.