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
Storage device having clock adjustment circuitry with firmware-based predictive correction
Method and system for producing fluoride gas and fluorine-doped glass or ceramics
Bluetooth headset
Escalating data backup protection in response to a failure in a cluster of nodes
Systems and methods for assigning a template to an existing network configuration
Systems and methods for generating a hybrid text string from two or more text strings generated by multiple automated speech recognition systems
Coffee cup stationery tab
  Randomly Featured Patents
Semiconductor integrated circuit device
Process for producing elastic thermoplastic .alpha.-olefin/cyclic olefin copolymers
Tool for tying crossing elements
Microwave autoclave
Method of manufacturing an integrated circuit utilizing outdiffusion and multiple layer epitaxy
Method of manufacturing laminated ceramic material
Control element
Auger screen
Case
Signaling exchange for handover control for wireless networks