Temperature compensated crystal oscillator
CA 1087698 A · Owner: Sony Corporation · Inventors: Shinohara, Hiroshi; Waku, Toshihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A temperature-compensated crystal oscillator including an oscillator circuit having a crystal and a variable capacitance; a differential amplifier connected to the oscillator circuit and comprising first and second transistors establishing a current sink path; a bridge circuit connected to the differential amplifier so as to supply a biasing voltage to the first and second transistors, the bridge circuit including a first temperature sensitive element; and semiconductive device connected to the current sink path of the differential amplifier having a temperature characteristic which compensates a temperature characteristic of the variable capacitance.
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 October 14, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 14, 1997.
- 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.