Dual-gate MESFET variable gain constant output power amplifier Patent #: 4456889
ApplicationNo. 10790184 filed on 03/02/2004
US Classes:330/278, Including gain control means330/98, In cascade amplifiers330/254, Having gain control means455/234.2, Processor controlled455/245.2, Plural stages controlled455/246.1, Responsive to plural inputs455/247.1, Separate automatic gain control signals330/279, And significant control voltage developing means330/133Different bias control means for different stages of cascade amplifier
ExaminersPrimary: Shingleton, Michael B
Attorney, Agent or Firm
Foreign Patent References
International ClassH03G 3/10
AbstractIn order to rapidly control the gains of a plurality of variable gain amplifiers VGAs, each of gain control circuits is configured to determine a gain to be set therein, based on gain control information received from other gain control circuits existing in its preceding stage or stages and the signal level detected by a level detector circuit connected thereto. By carrying out such gain control, a total application gain is stabilized more quickly by gain control. Therefore, even in receiving systems that the preparation period for reception is very short, desired gain control is achieved within this period and stable data reception can be performed.