Resources Contact Us Home
Pulse width modulating circuit

Image Number 5 for United States Patent #4275354.

First and second counters in a pulse width modulating circuit, whose respective outputs determine the trailing and leading edges of a pulse width modulated signal, count input clock pulses at a constant speed. The number of the pulses applied to the second counter during a cycle relative to the number of the pulses applied to the first counter is increased or decreased by one in response to a modulating pulse to change the counting phase of the second counter thereby changing the width of the pulse width modulated signal. Gates freeze the phases of the two counters at minimum and maximum pulse widths of the pulse width modulated signal to avoid abrupt jumps from minimum to maximum or vice versa.

  Recently Added Patents
Noise spectrum tracking in noisy acoustical signals
Acoustic reconfiguration devices and methods
Substituted di-arylhydantoin and di-arylthiohydantoin compounds and methods of use thereof
Method of forming solderable side-surface terminals of quad no-lead frame (QFN) integrated circuit packages
Polymer-encapsulated colorant nanoparticles
Laboratory spatula
Method and device for operating a vehicle having a hybrid drive
  Randomly Featured Patents
Lamination apparatus and method of use
Suspended sleeping platform assembly
Arrangement for generating pulse sequences
System and method for display device with integrated desiccant
Recording device with temperature-dependent write current control
Method and apparatus for improving poultry feed conversion
Oxygen tank key
Oxygen permeable polymeric materials
Cup holder for shopping carts that retracts into the basket of the shopping cart
Method and device for cutting or slotting rigid material, in particular wood