Quadrature mixer circuit including three-input local mixers
AssigneeNEC Electronics Corporation
InventorKatsuji Kimura
Life of this patent
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Abstract
In a quadrature mixer circuit for receiving a radio frequency signal to generate first and second quadrature output signals, a first three-input mixer receives the radio frequency signal, a first local signal having a first frequency and a second local signal having a second frequency to generate the first quadrature output signal, and a second three-input mixer receives the radio frequency signal, the first local signal and the second local signal to generate the second quadrature output signal. The second local signal received by the first three-input mixer and the second local signal received by the second three-input mixer being out of phase by π/2 from each other.
Claims22
A quadrature mixer circuit for receiving a radio frequency signal to generate first and second quadrature output signals, comprising:
- a first three-input mixer for receiving said radio frequency signal, a first local signal having a first frequency and a second local signal having a second frequency to generate said first quadrature output signal;
- and
- a second three-input mixer for receiving said radio frequency signal, said first local signal and said second local signal to generate said second quadrature output signal,
- said second local signal received by said first three-input mixer and said second local signal received by said second three-input mixer being out of phase by π/2 from each other.
Dependencies are inferred from the claim text.