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
Redistribution layer (RDL) with variable offset bumps
System and method for routing streaming data requests
Digital broadcasting system and method of processing data in digital broadcasting system
Light transformation particle and photobioreactor
Data recording apparatus with recording control based on defect block and control method thereof
Image forming apparatus
Battery-operated massager and soap dispensing wand
  Randomly Featured Patents
Automatically generating a second graphical program based on a first graphical program
Electronic controlled liquid soap dispenser
Virus localization using cryptographic hashing
Crochet needle storage and dispensing device
Technique for reducing traffic in an instruction fetch unit of a chip multiprocessor
Apparatus for inspecting disc recording medium
Anticonvulsant phenethyl sulfamates
Platen having media suction and vapor recovery ports
Constant stress diffusion cell with controllable moisture content
Method of making semiconductor device with PN junction in stacking-fault free zone