Circuit arrangement for the demodulation of an amplitude-modulated signal
CA 1067588 A · Owner: Siemens Aktiengesellschaft · Inventors: Schatter, Eckart; Kriedt, Hans; Zulauf, Jean-Marc
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an integrated circuit arrangement for the envelope curve rectification of an amplitude-modulated signal. A differential amplifier is operated by the HF signal. The differential-amplifier negative feedback consists of a constant current source. The operative points of the differential amplifier-transistors are maintained constant in that the collectors are provided with a negative feedback via rectifiers and a current amplifier to the emitters of the differential amplifier transistors. The emitter potential of the differential amplifier transistors thus exactly follows the peak amplitude of the HF signal. The circuit can be used in integrated circuit form with a …
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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 December 4, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 4, 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.