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公开(公告)号：US10424358B2
公开(公告)日：2019-09-24
申请号：US15870486
申请日：2018-01-12
Applicant: SanDisk Technologies LLC
Inventor： Supraja Sundaresan , Sung-en Wang , Khin Htoo , Primit Modi
Abstract: Disclosed is a device including a selected distributed driver, a first feedback control circuit, and a second feedback control circuit. The first feedback control circuit is coupled to the selected distributed driver. The first feedback control circuit is configured to maintain an output of the selected distributed driver within a first predetermined range. The second feedback control circuit is selectively coupled to the selected distributed driver and is configured to maintain the output of the selected distributed driver to be within a second predetermined range. The second predetermined range is within the first predetermined range.
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公开(公告)号：US09698676B1
公开(公告)日：2017-07-04
申请号：US15068053
申请日：2016-03-11
Applicant: SanDisk Technologies LLC
Inventor： Jonathan Huynh , Trung Pham , Sung-en Wang , Jongmin Park
Abstract: Techniques are presented for determining current levels based on the behavior of a charge pump system while driving a load under regulation. Rather than diving the load directly, a fixed pump output voltage is used to supply a step-down regulator, which it turn drives the load at the selected voltage. While driving the load under regulation, the number of pump clocks during a set interval is counted. This can be compared to a reference that can be obtained, for example, from the numbers of cycles needed to drive a known load current over an interval of the duration. By comparing the counts, the amount of current being drawn by the load can be determined. This technique can be applied to determining leakage from circuit elements, such as word lines in a non-volatile memory.
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