Charge transfer devices
CA 1135858 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Van Roermund, Arthur H.M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1 PHN.8911 C. ABSTRACT:, A charge transfer device has one or more control electrodes (8) connected to switching means (20) so that the electrode (8) can perform two functions. Normally the electrode (8) is used for charge transfer but it may be switched to act as a blocking electrode for blocking the charge (S) present underneath it for one or more clock phases. This permits the device to be formed as a filter, an analog to digital converter or digital to analog converter in a simple and cheap manner. The charge transfer channel may be split into sections using e.g. isolation diffusions (12 see Figure 4; or 51,52,52 see Figure 5). (It is suggested that Figure 1 should accompany the Abstract …
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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 16, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 16, 1999.
- 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.