A dual input low noise amplifier (LNA) for multi-band frequency operation
is disclosed. The dual input LNA (100) simultaneously operates in two
amplifier configurations for the two inputs (101 and 103), of a first
frequency band and a second frequency band, to produce a common output
(113). Matching networks (102 and 104) receive and pass the inputs (101
and 103) to a transistor device (106). The transistor device is coupled
to a series resonant circuit (108) at a first input node (107) to ground
AC signal energy from a second input node (109) of the transistor device.
The grounding causes the transistor device to simultaneously amplify and
combine the signals at the first and the second input nodes to produce
the common output of the first frequency band and the second frequency
band at a common output node (111) of the transistor device.