Resources Contact Us Home
Integrated LDO with variable resistive load

Image Number 5 for United States Patent #8143868.

To provide adequate compensation for a wide range of output loads, a low dropout (LDO) regulator has an amplifier, a pass transistor, a voltage divider, a compensation network, and a control circuit. The amplifier outputs a comparison result according to a reference signal and a feedback signal. The pass transistor generates an output current based on the comparison result of the amplifier. The voltage divider generates the feedback signal according to the output current. The compensation network couples the output of the pass transistor to a low-impedance node of the amplifier, and has a compensation capacitor and a variable resistor coupled to the compensation capacitor. The control circuit is coupled to the input of the pass transistor and to the variable resistor for controlling resistance of the variable resistor according to the output current of the pass transistor.

  Recently Added Patents
Sports helmet
Humidity indicator and method for fabricating the same
Method and apparatus for connecting signal lines of multiple layers to certain contacts while preventing connections with other contacts
Methods and apparatus for map detection with reduced complexity
Cosmetic product including vegetable oil blend
Information repository search system
Dynamically reconfigurable systolic array accelorators
  Randomly Featured Patents
Production of zinc and alkaline earth metal titanates
Hydrodynamic bearing with reduced temperature sensitivity
Optical pick-up head, optical information apparatus, and optical information reproducing method
Heat radiating type liquid level sensing system and the method therefor
Semiconductor integrated circuit having circuit for correcting data output timing
Implement for applying sealant to asphalt pavement or the like
Combined needle hub with twist lock sheath
Electrical assembly for use with a rotary transformer and method for making the same
Lubrication arrangement for a generator system
One-step system for cleansing, conditioning, and treating the skin