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

Image Number 4 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
Liquid crystal display and method of driving the same
Universal data-driven computer proxy
Efficient relay automatic repeat request procedure in broadband wireless access system
Automated dynamic differential data processing
Real-time RSL monitoring in a web-based application
Semiconductor device and method for manufacturing the same
System and method for managing investment funds
  Randomly Featured Patents
Retractable handle assembly with multiple engaging position for wheeled luggage
DC balance compensation for AC-coupled circuits
Article of footwear
Stabilized frozen potato salad
Universal joint
Synthetic foot and mouth disease antigen
Low resistivity tungsten silicon composite film
Deselected word line that floats during MLC programming of a flash memory
Steering drill string
Method for maximizing retirement income using financial bridge products and deferred social security income