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  2. Frequency mixer - Wikipedia

    en.wikipedia.org/wiki/Frequency_mixer

    Selection of a mixer type is a trade off for a particular application. [2] Mixer circuits are characterized by their properties such as conversion gain (or loss), noise figure and nonlinearity. [3] Nonlinear electronic components that are used as mixers include diodes and transistors biased near cutoff.

  3. Electronic mixer - Wikipedia

    en.wikipedia.org/wiki/Electronic_mixer

    Diode mixers take advantage of the non-linearity of diode devices to produce the desired multiplication in the squared term. They are very inefficient as most of the power output is in other unwanted terms which need filtering out. Inexpensive AM radios still use diode mixers. Electronic mixers are usually made with transistors and/or diodes ...

  4. Gilbert cell - Wikipedia

    en.wikipedia.org/wiki/Gilbert_cell

    As a mixer, its balanced operation cancels out many unwanted mixing products, resulting in a "cleaner" output. It is a generalized case of an early circuit first used by Howard Jones in 1963, [ 2 ] invented independently and greatly augmented by Barrie Gilbert in 1967. [ 3 ]

  5. Phase detector - Wikipedia

    en.wikipedia.org/wiki/Phase_detector

    A mixer-based detector (e.g., a Schottky diode-based double-balanced mixer) provides "the ultimate in phase noise floor performance" and "in system sensitivity." since it does not create finite pulse widths at the phase detector output. [2] Another advantage of a mixer-based PD is its relative simplicity. [2]

  6. IQ imbalance - Wikipedia

    en.wikipedia.org/wiki/IQ_imbalance

    IQ imbalance is a performance-limiting issue in the design of a class of radio receivers known as direct conversion receivers. [ a ] These translate the received radio frequency (RF, or pass-band ) signal directly from the carrier frequency f c {\displaystyle f_{c}} to baseband using a single mixing stage.

  7. Heterodyne - Wikipedia

    en.wikipedia.org/wiki/Heterodyne

    [2] [4] The two input frequencies are combined in a nonlinear signal-processing device such as a vacuum tube, transistor, or diode, usually called a mixer. [ 2 ] In the most common application, two signals at frequencies f 1 and f 2 are mixed, creating two new signals, one at the sum of the two frequencies f 1 + f 2 , and the other at the ...

  8. Active rectification - Wikipedia

    en.wikipedia.org/wiki/Active_rectification

    In low voltage converters (around 10 volts and less), the voltage drop of a diode (typically around 0.7 to 1 volt for a silicon diode at its rated current) has an adverse effect on efficiency. One classic solution replaces standard silicon diodes with Schottky diodes , which exhibit very low voltage drops (as low as 0.3 volts).

  9. Product detector - Wikipedia

    en.wikipedia.org/wiki/Product_detector

    A product detector is a frequency mixer. Product detectors can be designed to accept either IF or RF frequency inputs. A product detector which accepts an IF signal would be used as a demodulator block in a superheterodyne receiver , and a detector designed for RF can be combined with an RF amplifier and a low-pass filter into a direct ...

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