Signal compression circuit, particularly for a telephone set
CA 1292589 C · Owner: Arnaud, Thierry · Inventors: Defretin, Bruno; Arnaud, Thierry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a signal compression circuit, more particularly for a telephone set of the handsfree-type, comprising a preamplifier (10) the, input of which is connected with an input signal to be processed, and a preamplifier gain control device (11) for servo-controlling, to a predetermined value the, output signal amplitude of the preamplifier in which, the gain control device (11) is associated with a circuit (C, 15, 16) determining two time constants which respectively control the increase or decrease speed of the preamplifier gain (10) in relation with the input signal amplitude (Vin).
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 November 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 26, 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.