Phase detector
CA 1293776 C · Owner: Nortel Networks Limited · Inventors: Ross, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A phase detector includes a bridge of FETs which are simultaneously rendered conductive by pulses of a reference signal having a very small duty cycle. A higher frequency signal whose, phase in relation to the reference signal is to be detected is, supplied to a gate of one of the FETs. A bridge output signal is low pass filtered and differentially amplified to produce a phase detector output signal. The phase detector output signal can be used directly to control the frequency of a voltage controlled oscillator which produces the higher frequency signal. - i -
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 December 31, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 31, 2008.
- 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.