Patent ID: 6778015
Filing Date: 2004-08-17
Classification: H03F

Abstract:
A distributed amplifier comprising:a plurality of amplifying circuits; an input terminal common to said plurality of amplifying circuits; and an output terminal common to said plurality of amplifying circuits, wherein said amplifying circuits are connected in parallel to said common input terminal and said common output terminal, wherein each of said amplifying circuits is operable to input a signal supplied from said input terminal, to amplify the input signal and to output the signal to said output terminal following amplification, wherein said amplifying circuits are constructed so that gain values can be set separately for each of said amplifying circuits, wherein said amplifying circuits comprise cascode amplifying circuits, wherein each of said amplifying circuits comprises a first transistor having a first grounded terminal, a second terminal and a control terminal connected to said input terminal, and a second transistor having a first terminal connected to said second terminal of said first transistor, a second terminal connected to said output terminal and a grounded control terminal, and wherein the gain values of said amplifying circuits are settable via potential application to said first terminal of each of said first transistors.