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
Photoconductor cartridge
Catalysts and process for producing aldehydes
Color image display device, color filter substrate, color pixel array substrate, and electronic device
Method and system for routing telephony communications together with modified calling party identifier information
Preserving user applied markings made to a hardcopy original document
Dye-sensitized solar cell, dye-sensitized solar cell module, and coating liquid for forming electrolyte layer
Semiconductor devices having through electrodes and methods of fabricating the same
  Randomly Featured Patents
Volume control for audio signals
Programmable controller with high density intelligent I/O interface
I/O card and its associated cable harness assembly
Camera unit with driving corridor display functionality for a vehicle, method for displaying anticipated trajectory of a vehicle, and system for generating driving corridor markers
Variable speed motor
Dynamic power management for internal information handling system links
Aerial toy
Method and apparatus for conducting a transaction between transaction processing systems
Toy construction element