Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Output circuits with class D amplifier










Image Number 12 for United States Patent #8022756.

Output circuits using pulse width modulation (PWM) and/or pulse density modulation (PDM) are described. In one aspect, a PWM output circuit includes a PWM modulator that operates based on a square wave signal instead of a sawtooth or triangular wave signal. In another aspect, a PDM output circuit includes a PDM modulator that uses variable reference voltages to reduce variations in switching frequency. In yet another aspect, a dual-mode output circuit supports both PWM and PDM and includes a pulse modulator and a class D amplifier. The pulse modulator performs PWM on an input signal if a PWM mode is selected and performs PDM on the input signal if a PDM mode is selected. The class D amplifier receives a driver signal from the pulse modulator and generates an output signal.








 
 
  Recently Added Patents
Comparison of visual information
Providing a web page to a client
Adsorptive molded parts and the use thereof
Compositions and methods for activating innate and allergic immunity
Playback device for stereoscopic viewing, integrated circuit, and program
Pill identification and counterfeit detection method
Communication system including relay station and data frame for the communication system
  Randomly Featured Patents
Protein, DNA coding for same and method of producing the protein
Rotating coil centrifuge
Quadratic amplitude control circuit for cosite interference cancellation
High resolution rotary encoder having appositely rotating disks
Removal of biological contaminants
Blood flow oxygen measurement system and method
Tessellating and quadding pels during image transfer
Nucleic acid probes specific to the spirochete Borrelia burgdorferi
Offsetting future account discrepancy assessments
Triazolone derivatives