Resources Contact Us Home
Electronic trip device comprising, in series, finite and infinite impulse response filters

Image Number 7 for United States Patent #6069780.

The electronic trip device comprises in series for each phase of a power system a sampler, a squaring circuit and a finite impulse response (FIR) filter. A maximum circuit is connected to the output of the FIR filters and to the input of an infinite impulse response filter. A comparison circuit for comparison to thresholds is connected to the output of the IIR filter. It is thus possible to obtain both a good precision and good filtering of the harmonics of the frequencies of conventional power systems (50 Hz, 60 Hz and 400 Hz), and to reduce the necessary computing power, and consequently the cost of the trip device.

  Recently Added Patents
System and method of supplying an electrical system with direct current
Real-time application of filters based on image attributes
Human and mouse targeting peptides identified by phage display
Method and device for surface scanning of a patient
Signal judgment method, signal judgment apparatus, program, and signal judgment system
Push mechanism for efficiently sending aggregated data items to client
Compact ion accelerator source
  Randomly Featured Patents
Phonograph decoupling apparatus and method
Apparatus and method for the preheating of liquid wastes in a waste disposal process
Method for displaying information in a virtual reality environment
Wall mountable soap dish
Massage roller
Adjustable device for tensioning a bicycle drive chain
Side load magazine for a fastener driving tool
Personal portable storage medium
Adjustable traction block
Test operation of electronic demand register