Invention Grant
- Patent Title: Programmable delay introducing circuit in self timed memory
- Patent Title (中): 自定时存储器中的可编程延迟引入电路
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Application No.: US14532174Application Date: 2014-11-04
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Publication No.: US09147453B2Publication Date: 2015-09-29
- Inventor: Nishu Kohli , Mudit Bhargava , Shishir Kumar
- Applicant: STMICROELECTRONICS INTERNATIONAL N.V.
- Applicant Address: NL Amsterdam
- Assignee: STMICROELECTRONICS INTERNATIONAL N.V.
- Current Assignee: STMICROELECTRONICS INTERNATIONAL N.V.
- Current Assignee Address: NL Amsterdam
- Agency: Allen, Dyer, Doppelt, Milbrath & Gilchrist, P.A.
- Priority: IN3546/DEL/2005 20051230
- Main IPC: H05B1/02
- IPC: H05B1/02 ; G11C7/22 ; G11C7/06 ; G11C7/08 ; G11C29/12 ; G11C29/14 ; G11C29/50

Abstract:
Delays are introduced in self-timed memories by introducing a capacitance on the path of a signal to be delayed. The capacitances are realized by using idle-lying metal layers in the circuitry. The signal to be delayed is connected to the idle-lying capacitances via programmable switches. The amount of delay introduced depends on the capacitance introduced in the path of signal, which in turn depends on state of the switches. The state of the switches is controlled by delay codes provided externally to the delay introducing circuitry. Since idle-lying metal capacitances are utilized, the circuitry can be implemented using a minimum amount of additional hardware. Also, the delay provided by the circuitry is a function of memory cell SPICE characteristics and core parasitic capacitances.
Public/Granted literature
- US20150055400A1 PROGRAMMABLE DELAY INTRODUCING CIRCUIT IN SELF TIMED MEMORY Public/Granted day:2015-02-26
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