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
Method and system for text to speech conversion
Toner cartridge and image forming apparatus including the same
Triplate line inter-layer connector, and planar array antenna
Filter medium and breather filter structure
Method for fabricating light guide plate
Solid-state imaging device and camera system
Remote authentication based on challenge-response using digital certificates
  Randomly Featured Patents
Compressed bean composite and method therefore
Cabinet for electronic data processing equipment
Rhombohedral nasicon compound and battery
Stator of direct drive motor
Gathering operational metrics within a grid environment using ghost agents
Antenna malfunction detecting system
Trigger mechanism for rotating frame animal traps
Edge and line detection in multidimensional noisey, imagery data
Fireplace furnace apparatus
Multi-lamp driving system