Amplifier circuit e.g. for mobile telecommunications, has transformer primary connected to first- and second-terminals of transistor

摘要

An amplifier circuit (100) has a transistor (102) with a base (control) connection (104) and first- and second-connections (106,108), a signal input connection (RFin) which is coupled to the control connection (104) of the transistor, a transformer (112) having a primary- and secondary- (114;116), whose primary is connected to the first (106) and second (108) connection of the transistor (102), and a signal output connection (RFout) which is coupled to the secondary (116) of the transformer (112).