| 摘要 |
A receiver circuit (10) is disclosed. It comprises a common source or common emitter LNA circuit (30) for amplifying signals at an operating frequency f in the receiver circuit (10). The LNA circuit (30) comprises an input transistor (50) having a first terminal (52), which is a gate or base terminal, operatively connected to an input terminal (32) of the LNA circuit (30), a shunt-feedback capacitor (60) operatively connected between the first terminal (52) of the input transistor (50) and a second terminal (54), which is a drain or collector terminal, of the input transistor (50), and an output capacitor (65) operatively connected between the second terminal (54) of the input transistor (50) and an output terminal (34) of the LNA circuit. The receiver circuit (10) comprises a termination circuit (40) with a current input terminal connected to the output terminal (34) of the LNA circuit (30). The magnitude | Z in ( f ) of the input impedance Z in of the termination circuit (40) at the frequency f is less than 1/10 of the magnitude | Z C L ( f )| =1 /(2À f · C L ) of the impedance Z CL ( f ) of the output capacitor (65) of the LNA circuit 30. |
