Mixer circuit
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorMingquan Bao
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Abstract
The invention discloses a mixer circuit (10, 20, 30, 410, 60) comprising a first mixer component (11, 21) with a first (13, 23) and a second (12, 22) input port for a first and a second input signal respectively and an output port (14, 24) for outputting a mixed signal. According to the invention, the mixer circuit (10, 20, 30, 410, 60) also comprises a transformer (15) which connects the first (13, 23) and second (12, 22) input ports of the mixer component (11, 21) inductively via an inverting coupling. In one embodiment, the mixer circuit (30, 410, 60) also comprises inputs for DC-bias of one (13) of the input ports and of the output port (14), as well as an impedance (31) as a filter at the output port.
Claims8
A mixer circuit comprising a transistor as a first mixer component with a first and a second input port for a first and a second input signal respectively and an output port for outputting a mixed signal, the mixer circuit further comprising a transformer which connects the first and second input ports of the mixer component inductively via an inverting coupling.
Dependencies are inferred from the claim text.