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
Vehicle driving assistance apparatus
Process for producing liquid crystal element, and liquid crystal element
Format for providing traffic information and a method and apparatus for using the format
Low powered activation arrangement and method thereof
Method and apparatus for providing very high throughput operation and capability signaling for wireless communications
Device and method for adjusting a chrominance signal based on an edge strength
Electronic system auto-mute control circuit and control method thereof
  Randomly Featured Patents
Small particle size lightweight aggregate
Reduced capacity carrier, transport, load port, buffer system
Contoured massager with extension
Bi-directional wireless detection system
Cutting insert
Wipes stand with container storage
Cylindrical air filter with radially directed seal and method of manufacturing a housing for same
Jetting nozzle
Electrical continuity and short circuit testing
Bipolar violation rate calculation method