Signal compression/expansion apparatus
CA 1056311 A · Owner: Sony Corporation · Inventors: Yamada, Takaaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Signal expansion/compression apparatus wherein an input signal is compressed by an exponential factor and then subsequently may be expanded by the reciprocal of that exponential factor where-, in neither the signal compression circuits nor the signal expansion circuits need be provided with exponential amplifiers or logarithmic function generators. The signal compression circuit includes a plurality of serially-connected voltage controlled amplifiers a, first of such amplifiers receiving the input signal to be compressed and a predetermined one of such amplifiers providing the compressed output signal. A control signal generator is connected to the last of the voltage controlled amplifiers …
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 June 12, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 12, 1996.
- 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.