Resources Contact Us Home
Method and device for biasing a transistor of a radio frequency amplifier stage

Image Number 3 for United States Patent #6778019.

A biasing device includes closed-loop transconductance slaving circuit, able to slave the time average of the base/emitter or gate/source voltage of the amplifier transistor (Q1) to a reference voltage corresponding to a desired quiescent current for the transistor. Moreover, viewed from the base or gate of the amplifier transistor (Q1), the impedance of the base/emitter or gate/source circuit is small at low frequency, and large with respect to the impedance of the radio frequency source within the radio frequency range of the signal. The device can be incorporated in a mobile terminal, such as a cellular mobile phone.

  Recently Added Patents
Key management using quasi out of band authentication architecture
Nestable shallow container
Case for electronic device
Tomlinson Harashima precoding with additional receiver processing in a multi-user multiple-input multiple-output wireless transmission system
Bezel-less electronic display
Debugging using code analysis
Method and apparatus for providing charging status information to subscriber of communication service
  Randomly Featured Patents
Platform and system for propellant tank storage and transfer in space
Imaging apparatus and method for manufacturing microlens array
Non-continuous encapsulation layer for MIM capacitor
Singlemode optical fiber signal termination tool
Producing power from a cryogenic liquid
Variable beam trimaran
Removable switch electrocautery instruments
Stock and kit for accommodating mounting on a plurality of different firearms
Active magnetic bearing system for blood pump