Invention Grant
- Patent Title: Supply tracking delay element in multiple power domain designs
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Application No.: US15676752Application Date: 2017-08-14
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Publication No.: US10833664B2Publication Date: 2020-11-10
- Inventor: Greg M. Hess , Hemangi U. Gajjewar , Sachmanik Cheema
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.
- Main IPC: H03K5/159
- IPC: H03K5/159 ; H03K19/0175 ; H03K5/00 ; G06F30/30

Abstract:
An apparatus for delaying a signal transition is disclosed. The apparatus includes a first circuit coupled to a first power supply signal and a second, different power supply signal. The first circuit may be configured to, based on a voltage level of a logic signal, sink a current from an intermediate circuit node. A value of the current may be based upon a voltage level of the second different power supply signal. The apparatus also includes a second circuit coupled to the first power supply signal. The second circuit may be configured to generate an output signal based upon a voltage level of the intermediate circuit node. An amount of time between a transition of the logic signal and a corresponding transition of the output signal may be based on an amount of the current.
Public/Granted literature
- US20190052254A1 SUPPLY TRACKING DELAY ELEMENT IN MULTIPLE POWER DOMAIN DESIGNS Public/Granted day:2019-02-14
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