Circuit arrangement comprising a differential amplifier
CA 1194151 A · Owner: Philips Electronics N.V. · Inventors: Matthies, Karl-Heinz; Harlos, Hartmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Circuit arrangement comprising a differential amplifier. A circuit arrangement comprising a differential amplifier, which supplies a balanced alternating voltage having a d.c. component which is filtered by means of a low-pass filter and is used for negative feedback. In order to economize a second filter capacitor the voltages, are supplied through a low-pass circuit to a second differential amplifier, which supplies an unbalanced d.c. control quantity which is supplied through a further, low-pass filter comprising only one capacitor to the first differential amplifier.
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 September 24, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 24, 2002.
- 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.