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
Vehicles with electric motor
Method and apparatus for internet on-line insurance policy service
Device for transmitting data between a serial data bus and working modules such as actuator modules and/or I/O modules
System and method for displaying relationships between electronically stored information to provide classification suggestions via inclusion
Compression molding method and reinforced thermoplastic parts molded thereby
Dispensing of restricted goods
Combination of the application of antibodies for immunostimulation together with glucocorticoids
  Randomly Featured Patents
Linear drive for sliding doors or the like
Method and apparatus for extermination of pests
Fuel cell system and method for generating electrical energy using a fuel cell system
Battery charge with temperature-sensitive cut-off switch
Biological compositions and methods for treatment of lung cancer
Device and methods for liquid crystal-based bioagent detection
Discharge valve apparatus for reciprocating compressor
Hot stamp machine for custom imprinting plastic identifier tags
Electronic publishing system
Packet control channel feedback support for contention and reservation based access