Resources Contact Us Home
Amplifier feedback and bias configuration

Image Number 4 for United States Patent #7446612.

A wireless communication device output amplifier configured to reduce or eliminate out of band oscillations from voltage standing waves generated by antenna impedance mismatch reflection. The amplifier is configured with an input, output, and biasing node. The biasing node is configured to receive a biasing signal from a biasing amplifier. The biasing amplifier draws current from the biasing node while providing the biasing voltage to the output amplifier. To reduce or eliminate out of band voltage standing waves from antenna reflections, a frequency dependant network is provided as a feedback loop to selectively provide feedback to the output amplifier to reduce or eliminate unwanted out of band oscillations, such as voltage standing waves. The frequency dependant network may comprise one or more resistors, inductors, and capacitors which are of small size and may be integrated.

  Recently Added Patents
Communication terminal device, and recording medium
Identification of websites that break out of frames
Methods and systems for detecting icing conditions
Power conversion device and method for controlling thereof
Case for electronic device
Motion estimation for a video transcoder
Semiconductor device
  Randomly Featured Patents
10,11-methanodibenzosuberane derivatives
Method for video transcoding with adaptive frame rate control
Cover for truck/trailer male electrical plug
Alumina multilayer wiring substrate provided with high dielectric material layer
Workstation cluster
Deburring knife with replaceable blade
Method for inhibiting new tissue growth in blood vessels in a patient subjected to blood vessel injury
Processing apparatus, system and method for processing checks in communication with a host computer and a host computer for controlling the check processing apparatus
Hair softening method and compositions
Self-aligned trenched-channel lateral-current-flow transistor