RF Mixer Circuit


Posted on Feb 7, 2014

In the general sense a mixer is basically any circuit that combines two or more circuits or signals into a common output. A more commonly used definition defines a mixer as a nonlinear circuit as one that accepts as its input two different frequencies [F1 & F2] and than outputs between two and four signals: The term non-linear refers to a component which causes a current


RF Mixer Circuit
Click here to download the full size of the above Circuit.

to with the application of a voltage, but the current does not change in a linear relationship with the voltage. See Heterodyning. The standard symbol for a mixer, shown in the right side-bar is a circle with an `X` in the center. The diagram also depicts one of the most common uses of a mixer, that is combing a local oscillator with an RF signal to produce an IF signal. The term mixer describes a function, that of mixing two signals together. So there are a vast number of ways to implement a mixer. The mixers shown on this page include a mixer made from a diode, a transistor mixer, and a vacuum tube mixer. However those are just the component used to provide the nonlinear function, within those three groupings there are even more variations. There isn`t necessarily a need to design a mixer using discrete components. Mixers are also sold as complete self-contained components, refer here for a lost of Manufacturers of RF Mixers. The circuits shown here are just intended to show a few different circuit variations, and not intended to cover the design of a mixer. Unbalanced mixers is a style that allows some of the input signal power to pass through to the output. While a single-balanced mixer is configured so the local oscillator, or RF input, cancels and cannot pass through to the output. However a double balanced mixer has symmetrical paths for both the oscillator and RF inputs, and will have no output if either input...




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    KNIGHT RIDER lights
    Subsonic audio Filter
    Low battery indicator
    Variable-voltage-regulator
    Check For Op-Amp Dc Offset Shift Circuit
    Frequency to Voltage Converter Circuit Schematic Diagram
    Mini Alarm Circuit Schematic
    555 LED flasher
    vu meter em84
    Good vibrations for energy harvesting
    XTR112 114 thermocouple measuring circuit diagram of a loop



    Top