Signal generator producing pulses with sloping edges
CA 1250350 A · Owner: Alcatel N.V. · Inventors: Rabaery, Dirk H.L.C.; Haspeslagh, Didier R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present metering signal generator generates bursts of 12 or 16 kHz sine waves, the bursts having gradually varying edges in order not to produce audible clicks. Due to offset of the amplifiers producing these edges the amplitude of the signal in the interburst time intervals may be relatively high and give rise to noise. This amplitude is therefore first made high so that it can be detected and then limited to a wanted value. The invention also describes a comparator circuit and a modulator circuit used in the signal generator.
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 February 21, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 21, 2006.
- 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.