Temperature compensated bipolar circuits
CA 1292289 C · Owner: Johnson, Terry J. · Inventors: Johnson, Terry J.; Luk, Timwah
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A temperature compensated ECL gate (20) with each gate circuit resistance formed by a pair of opposite polarity temperature coefficient resistors. A first gate transistor element (Q1) and a second gate transistor element (Q2) coupled at a common emitter coupling (12) provide alternative collector current paths from high potential (Vcc) through a first gate transistor collector path with collector resistance (R11,R12) and a gate transistor collector path with collector resistance (R21,R22). A current source transistor element (Q3) is coupled between the common emitter coupling (12) of the gate transistor elements and low potential (VEE) through current source resistance (R31,R32). …
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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 November 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 19, 2008.
- 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.