Term
| Tuned Radio Frequency Receiver |
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Definition
| The most elementary receiver design, consisting of RF amplifier stages, a detector, and audio amplifier stages. |
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Definition
| The minimum input RF signal to a receiver required to produce a specified audio signal at output. |
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Term
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Definition
| The baseline on a spectrum analyzer display, representing input noise of the system under test. |
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Definition
| The extent to which a receiver can differentiate between the desired signal and other signals. |
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Term
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Definition
| Another name for Diode Detector. |
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Term
| Product Detector, Heterodyne Detector or Synchronous Detector |
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Definition
| Oscillator, mixer, and low-pass filter stage used to obtain the intelligence from an AM signal. |
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Term
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Definition
| The mixer stage in a superheterodyne receiver that mixes the RF signal with a local oscillator signal to form the intermediate frequency signal. |
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Term
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Definition
| A small variable capacitance in parallel with each section of a ganged capacitor. |
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Term
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Definition
| A small variable capacitor in series with each ganged tuning capacitor in a superheterodyne receiver to provide near-perfect tracking at the low end of the tuning range. |
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Term
| Varactor Diodes,Varicap Diodes or VVC Diodes. |
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Definition
| Diode having small internal capacitance that varies as a function of their reverse bias voltage. |
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Term
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Definition
| The undesired input frequency in a superheterodyne receiver that produces the same intermediate frequency as the desired input signal. |
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Term
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Definition
| A superheterodyne receiver design that has two separate mixers, local oscillators and intermediate frequencies to avoid image frequency problems. |
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Term
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Definition
| The distortion that results from undesired mixer outputs. |
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Term
| Mixer, Converters, or First Detector |
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Definition
| They make use of the device's non-linearity to generate sum and difference frequencies between the RF and Local Oscillator signals. |
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Term
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Definition
| A specially fabricated majority carrier device formed from a metal semiconductor interface, with extremely low junction capacitance. |
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Term
| Self-Excited Mixer, Autodyne Mixer |
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Definition
| A single stage in a superheterodyne receiver that creates the LO signal and mixes it with the applied RF signal to form the IF signal. |
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Term
| Automatic Gain Control (AGC) |
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Definition
| The function in a receiver that allows weak RF signals to be amplified to a high degree and strong RF signals to be amplified to a lesser degree so that a near constant output level is produced. |
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Term
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Definition
| Diode that reduces receiver gain for very large signals. |
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Term
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Definition
| In a receiver, the dB difference between the largest tolerable receiver input level and its sensitivity level. |
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