Bicmos write-recovery circuit
CA 1314989 C · Owner: National Semiconductor Corporation · Inventors: Smith, Douglas D.; Kertis, Robert A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
8332-190 / 53.1119, BiCMOS WRITE-RECOVERY CIRCUIT ABSTRACT OF THE DISCLOSURE, A BiCMOS write-recovery method and circuit for recovering bit lines in a digital memory system provides approximately 1 nS recovery time and allows a 256K BiCMOS SRAM to achieve 10 nS access time. All bit lines in the memory system connected to a column not being read are held at a high potential approximately, equal to the upper power supply. During a write one, bit line is pulled low and its complementary bit line is clamped with a bipolar transistor to an intermediate potential, thereby preloading the complementary bit line. Following a write, the bit line that was pulled low is pulled up with a bipolar …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 23, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.