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
Paging of a user equipment (UE) within a wireless communications system
Digital photographing apparatus
Method and apparatus for linking a web browser link to a promotional offer
Time sharing type autostereoscopic display apparatus and method for driving the same
Data distribution unit for vehicle entertainment system
Image forming apparatus
Charge pump circuit and power-supply method for dynamically adjusting output voltage
  Randomly Featured Patents
Retaining device for a front cover of a computer casing
Managing method of electrical device, management apparatus, electrical device, communications device, program therefor, and management system of electrical device
Aromatic diamine compounds, bismalemide compounds, thermosetting resin forming compositions therefrom, resin therefrom, and methods for their preparation
High speed PES demodulator
Computer housing
Table with multiple folding segments
Safety system for a gas cooled high temperature reactor
Multilayered high voltage grading system for electrical conductors
Control device
Test apparatus performing runtime replacement of program instructions with breakpoint instructions for processor having multiple instruction fetch capabilities