Invention Grant
- Patent Title: BICMOS local address transition detection circuit
- Patent Title (中): BICMOS本地地址转换检测电路
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Application No.: US920086Application Date: 1992-07-27
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Publication No.: US5267216APublication Date: 1993-11-30
- Inventor: Bertrand Gabillard , Philippe Girard , Michel Grandguillot
- Applicant: Bertrand Gabillard , Philippe Girard , Michel Grandguillot
- Applicant Address: NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: NY Armonk
- Priority: EPX91480122.0 19910731
- Main IPC: G11C8/18
- IPC: G11C8/18 ; G11C8/00
Abstract:
A plurality of local address transition detector (LATD) circuits, one per address bit signal (Ai), of the type used in SRAMs to generate an on-chip clock pulse (LATDSi) that insures a correct timing of internal circuits such as sense amplifiers and address decoders that are essential for a correct READ/WRITE operation of the SRAM. According to one aspect of the invention, each LATD circuit includes: a first bipolar transistor (T1) serially connected with a first FET device (N1) forming a first branch; a second bipolar transistor (T2) serially connected with a second FET device (N2) forming a second branch. The first and second branches are connected in parallel between a first supply voltage (Vcc) and a common output node (N) connected to a circuit output terminal (30-i) where the output signal (LATDSi) generated by the LATD circuit (22-i) is available. The first and second bipolar transistors (T1, T2) are respectively driven by the address signal (Ai') and its complement (Ai') at the ECL voltage levels and the second and first FET devices are respectively driven by the address signal (Ai*' ) and its complement (Ai*') at the CMOS voltage levels. As a result of this design of the LATD circuit, the delays in critical paths in BICMOS circuits incorporating the LATD circuit may be significantly reduced relative to BICMOS circuits utilizing conventional LATD circuits.
Public/Granted literature
- US5967769A Ready to use campfire Public/Granted day:1999-10-19
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