公开(公告)号：US10523194B2

公开(公告)日：2019-12-31

申请号：US15717276

申请日：2017-09-27

Applicant: Apple Inc.

Inventor： Jaroslav Raszka ,  Amrinder S. Barn ,  Victor Zyuban ,  Shingo Suzuki ,  Ajay Kumar Bhatia ,  Mohamed H. Abu-Rahma ,  Shahzad Nazar ,  Greg M. Hess

IPC: H03K17/16 ,  H03K17/14 ,  H03K19/00 ,  H03K19/003

Abstract: A power switch control circuit is disclosed. A sensor circuit may determine a leakage current of a power switch coupled to a power supply signal and a power terminal of a circuit block. The power switch may be configured to selectively couple or decouple the circuit block from the power supply signal using a switch control signal. The switch control circuit may, in response to receiving a request to open the power switch, determine a target voltage level that is greater than a voltage level of the power supply signal for the switch control signal using the leakage current, and transition the switch control signal from an initial voltage to the target voltage level.

公开(公告)号：US11094395B2

公开(公告)日：2021-08-17

申请号：US16677470

申请日：2019-11-07

Applicant: Apple Inc.

Inventor： Shahzad Nazar ,  Mohamed H. Abu-Rahma ,  Amrinder S. Barn

IPC: G11C5/14 ,  G11C29/50 ,  G11C11/419 ,  G11C29/12 ,  G11C11/409

Abstract: An apparatus includes a memory circuit that includes a plurality of sub-arrays. The memory circuit is configured to implement a retention mode according to test information indicating voltage sensitivities for the plurality of sub-arrays. The apparatus also includes a voltage control circuit coupled to a power supply node. The voltage control circuit is configured, in response to activation of the retention mode for the plurality of sub-arrays, to generate, based on the test information, at least two different retention voltage levels for different ones of the plurality of sub-arrays. The at least two different retention voltage levels are lower than a power supply voltage level of the power supply node.

公开(公告)号：US20190097622A1

公开(公告)日：2019-03-28

申请号：US15717276

申请日：2017-09-27

Applicant: Apple Inc.

Inventor： Jaroslav Raszka ,  Amrinder S. Barn ,  Victor Zyuban ,  Shingo Suzuki ,  Ajay Kumar Bhatia ,  Mohamed H. Abu-Rahma ,  Shahzad Nazar ,  Greg M. Hess

IPC: H03K17/16

CPC classification number: H03K17/162 ,  H03K17/145 ,  H03K19/0016 ,  H03K19/00369 ,  H03K2217/0027 ,  H03K2217/0036

Abstract: A power switch control circuit is disclosed. A sensor circuit may determine a leakage current of a power switch coupled to a power supply signal and a power terminal of a circuit block. The power switch may be configured to selectively couple or decouple the circuit block from the power supply signal using a switch control signal. The switch control circuit may, in response to receiving a request to open the power switch, determine a target voltage level that is greater than a voltage level of the power supply signal for the switch control signal using the leakage current, and transition the switch control signal from an initial voltage to the target voltage level.