Frequency converter
CA 1099343 A · Owner: Oki Electric Industry Co. Ltd. · Inventors: Hata, Masayasu; Higuchi, Michio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a transmitter and receiver system a single, oscillator acts as a transmitter local oscillator a receiver, local oscillator, and a transmitter frequency converter. The local oscillator is a semi-conductor oscillator such as a Gunn diode or IMPATT diode, the DC power supply of which is modulated with the transmitter intermediate frequency signal. The oscillator is stabilized by self injection locking by a cavity resonator connected to the output of the diode; thus the oscillation frequency is very stable. The output of the oscillator is separated to provide side band signals one of which is used for transmission and a local oscillator frequency applied to a receiver mixer through an …
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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 April 14, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 1998.
- 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.