Invention Grant
- Patent Title: Pre-delay on-die termination shifting
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Application No.: US15965663Application Date: 2018-04-27
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Publication No.: US10367512B1Publication Date: 2019-07-30
- Inventor: Kallol Mazumder
- Applicant: Micron Technology, Inc.
- Applicant Address: US ID Boise
- Assignee: Micron Technology, Inc.
- Current Assignee: Micron Technology, Inc.
- Current Assignee Address: US ID Boise
- Agency: Perkins Coie LLP
- Main IPC: H03L7/08
- IPC: H03L7/08 ; H03L7/081 ; G11C7/10 ; G11C7/22 ; G11C11/4076

Abstract:
Memory systems can include shifting an ODT information signal prior to passing it through a cloned DLL delay line. The shifted ODT information passes through a cloned DLL delay line to move it into a DLL domain. Meanwhile, a clock gate can use a command indication to select whether to provide a clock signal to a DLL delay line. The clock gate can block the clock signal in the absence of a read or write operation and can pass the clock signal during read or write operations. When the DLL delay line receives the clock signal, it delays the clock signal to be in the DLL domain. By locating the ODT shifter before the cloned DLL delay line, as opposed to after it, the ODT shifter doesn't need a signal passed through the DLL delay line. Preventing the clock signal from passing through the DLL delay line reduces power consumption.
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