Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Display stand for a mobile tablet computer
Masking method and apparatus
Semiconductor device
Data-conditioned encryption method
Nacelle cover
Target output device and extreme ultraviolet light source apparatus
Computerized information and display methods
  Randomly Featured Patents
Selective transmission of an email attachment
Miniature mechanical vacuum pump
Tool handle with contoured through passageway and spring biased trigger
Exhaust braking apparatus
Combination toy vehicle and screwdriver
Processing silicon wafers employing processing gas atmospheres of similar molecular weight
Tire tread
System and method for processing data related to an annuity using an index-based amount to credit to a contract value
Process for preparing naphthyridones and intermediates
Signal output circuit