Phase lock system
CA 1164963 A · Owner: Tektronix, Inc. · Inventors: Crosby, Philip S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A second-order phase-locked loop circuit which does not require error voltage amplification is described. The output of a voltage controlled oscillator is accurately phase locked to a reference pulse. The loop phase detector is periodically enabled by a pulse generator and draws current only when enabled. Therefore very little noise may be coupled to the voltage controlled oscillator. The phase detector incorporates a current amplifier which allows very accurate establishment of the instant phase comparison takes place.
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 April 3, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 2001.
- 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.