Analogue-to-digital converters, digital-to-analogue converters, and digital modulators
CA 2067635 A1 · Owner: Gec-Marconi Limited · Inventors: Pearce, Timothy Halcombe Brook
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
P/8621/Special, - 30 -, ABSTRACT (Figure 1,2) Analogue-to-Digital converters. Digital-to-Analogue Converters and Digital Modulators, In order to improve the signal-to-noise ratio of a known sigma-delta analogue-to-digital converter A the input, to the loop filter means 3, 4 (which can be regarded as an error signal between the analogue input and ignoring, imperfections in the digital-to-analogue converter 8 the, analogue equivalent of the digital output) is filtered, amplified and converted to a digital signal in a second sigma-delta converter B. This digital signal is combined with the digital output of the analogue-to-digital converter A to produce an output of the two stage converter …
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
- Filed April 30, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2014.
- 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.