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
Flow cytometer method and apparatus
Power converter and method of power conversion
Hair care composition
Plants and seeds of corn variety CV294874
Antibodies to CCR2
Soliciting first party in communication session to maintain call when degradation of connection to second party is anticipated
Accelerator for a read-channel design and simulation tool
  Randomly Featured Patents
Charged-particle optical system with dual loading options
Laser treatment of cutaneous vascular lesions
Glass material used in, and fabrication method of, a plasma display panel
Data transmission
Rotating electric machine having fusion bonded stator core blocks
Automobile intruder alarm system
Low noise class AB linearized transconductor
Systems and methods for real-time tracking of targets in radiation therapy and other medical applications
Methods of power overload control in communication systems
Locking device and unauthorized unlocking prevention method