Wideband 6GHz Active Mixer with Glueless Local Oscillator Interface

　　The circuit shown in Figure 1 is a 10MHz to 6GHz broadband active mixer with an integrated interface for direct connection to a synthesizer-based low phase noise local oscillator (LO).

　　This circuit provides an optimal solution and is very attractive for broadband applications that require frequency conversion to higher or lower frequencies. The two-chip circuit covers a wide LO frequency range of 35MHz to 4400MHz. The LO interface is very simple and adopts a seamless design without the need for baluns, matching networks, and LO buffers. In addition, the mixer bias adjustment function can be used to optimize the IP3, noise figure, and supply current based on the application requirements or input signal size.