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
Method and apparatus for a cryptographically assisted commercial network system designed to facilitate buyer-driven conditional purchase offers
Filler containing composition and process for production and use thereof
Integrated circuit having a discrete capacitor mounted on a semiconductor die
Integrated circuit packaging system with coupling features and method of manufacture thereof
Wideband multi-channel receiver with fixed-frequency notch filter for interference rejection
Stacked magnetoresistance device responsive to a magnetic field generally perpendicular to a side face running along a channel of the device
Solid-state imaging device and electronic apparatus with antireflection structure
  Randomly Featured Patents
Fuel injection pump
Roller bearing and a method of producing the same
Method of production of polymers and copolymers of cycloalkene of norbornene type
Tank dispenser with end-of-life indicator
Air oxidation of an aromatic aldehyde to an aromatic acid
Method of creating an operating space endoscopically at an obstructed site
Touch position detection method for touch control device
DRAM writing ahead of sensing scheme
System and method for exposing distributed transaction services as web services
Computer and method for controlling whether or not to release all real storage areas assigned to virtual volume