Resources Contact Us Home
Voltage detection type overcurrent protection device for class-D amplifier

Image Number 7 for United States Patent #7701287.

The present invention discloses a voltage detection type overcurrent protection device, which applies to the output stage of a CMOS Class-D audio amplifier. Generally, a Class-D audio amplifier is used to drive a high-load loudspeaker; therefore, it needs a high-current driver. When there is a short circuit in the load, the high current will burn out the driver stage. The present invention detects the output voltage to indirectly monitor whether the output current is too large. Once an overcurrent is detected, the output-stage transistor is turned off to stop high current lest the circuit be burned out.

  Recently Added Patents
Method of manufacturing semiconductor device
Face recognition through face building from two or more partial face images from the same face
Method for distributing advertisements to client devices using an obscured ad monitoring function
Mechanical and moisture protection apparatus for electronic devices
Quaternary chalcogenide wafers
Clock face
  Randomly Featured Patents
Peroxygen compounds
External pupil lens system
Abnormality sensing device for gas-insulated electric apparatus
Animal leash bracket
Therapy and training device
Ink-jet printer
Object manager for common information model
Inflated fibers of regenerated cellulose formed from ionic liquid/cellulose dope and related products
Clip for mounting weatherstrip
Lighting fixture arm