Resources Contact Us Home
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
Water bottle warning triangle
Mobile terminal
Methods and apparatuses for configuring and operating graphics processing units
Fast and compact circuit for bus inversion
Systems and methods for identifying malicious domains using internet-wide DNS lookup patterns
Pyrazole kinase modulators and methods of use
Pet burial pod
  Randomly Featured Patents
Method of designing/manufacturing semiconductor integrated circuit device using combined exposure pattern and semiconductor integrated circuit device
Beverage can holder for refrigerator
Compactable ladder for a boat
Recombinant Chlamydia trachomatis pgp3 fusion protein
Bidirectional imaging with varying speeds
Alkylene-bis-thioalkanoic acid amide stabilizers for synthetic resins and synthetic resin compositions containing the same
Drum washing machine
Environmental control system
Deposition of titanium aluminides
Strip casting with an endless belt