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
Method and apparatus for controlling a multi-node process
Fast base station switching method and system, and hierarchical zone-based fast handoff approach
Display unit and display method
System and method for detecting malicious code executed by virtual machine
Parallel active optical cable
Baseball player stationery tab
Imaging apparatus having selection unit to select focus detection areas
  Randomly Featured Patents
Germicidal disc container for sterilizing a telephone mouthpiece
Systems and methods for uninterruptible power supply control
Air conditioner with condensate slinging fan
Needle sheathing and unsheathing safety device
System and method for protecting data on a mobile device
Image forming apparatus and method for forming an image by overlapping areas of different colors with each other
Cushioning material for packing
Electromagnetic machine with a deformable membrane
Franking system
ISDN terminal having diagnostic function