Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Pulse width modulation circuit










Image Number 13 for United States Patent #5451900.

To suppress electromagnetic radiation without exerting any harmful influence upon both S/N ratio and dynamic range, a pulse width modulation circuit includes an integrating circuit for integrating an input signal applied to an input terminal with respect to time, a comparing circuit connected to the integrating circuit and having hysteresis characteristics, a feedback circuit for feeding back the output of the comparing circuit to an input of the integrating circuit, and an amplitude modulation circuit, provided in a loop including the integrating circuit and the comparing circuit, for implementing amplitude modulation to modulate a frequency of the output of the comparing circuit. Further, the output of the comparing circuit can be fed-back to the integrating circuit via an amplitude modulation circuit. Alternatively, the amplitude of the output of the integrating circuit is first modulated by the amplitude modulation circuit, before being applied to the comparing circuit. A dither signal is applied to the amplitude modulation circuit or, alternatively, a signal for maintaining frequency of the pulse modulated signal may be applied.








 
 
  Recently Added Patents
System and method for multi-threaded OFDM channel equalizer
Methods, systems, and computer-readable media for providing an event alert
Image surveillance system and method of detecting whether object is left behind or taken away
Synthesized interoperable communications
Synergistic compositions for the treatment of topical viral infections
Flame-protected impact-modified polycarbonate compositions
Brushless electric motor or generator in shell construction
  Randomly Featured Patents
Synthetic resin molded surface fastener
Method for manufacturing trench MOSFET
Method and apparatus for producing a surface temperature map
Massage apparatus
Process and apparatus for the production of sterile filtered blood clotting factors
Fitting for a vehicle seat
Camouflage branding system and method
Process for sterilization of enzyme contaminated by bacteria
Inflatable prosthesis
Scroll-type hydraulic machine