Questions tagged [attenuator]

An attenuator is an electronic device that reduces the power of a signal without appreciably distorting its waveform.

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Attenuators in Waveguides

Let's consider for instance a rectangular waveguide with TE01 mode. As shown here, a possible attenuator may be realized with a metal card placed so that it is tangential to the electric field. Here ...
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Why is an attenuator placed on the scope end and not the PCB end?

I've noticed when adding an external attenuator between PCB and the scope (1MOhm) that it is placed in this manner: PCB -> SMA Socket -> SMA Cable Plug -> SMA Attenuator -> SMA-to-BNC -> Scope Why ...
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What does the attenuation setting do in an RF spectrum analyzer?

I have to make measurements of the RF power which a circuit is delivering, and I am using an RF spectrum analyzer for that purpose. I am a beginner in this topic, so I apologize if the question is too ...
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Audio attenuator has audible pops

I'm copying the recommended circuit (the 'Higher Performance' one, actually) from the LM1971 audio attenuator datasheet but there are audible (loud) pops on the output. I'm using OPA227s for all op-...
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Attenuating mid-supply biased audio signal before AC coupled audio amplifier

The context here is simple volume control of a DAC generated audio signal with a potentiometer before an audio amplifier stage in a single supply, battery powered system. Is there any advantage to ...
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Noise figure of an attenuator is equal to the loss

Does anyone know a mathematical proof of this concept? Are there limitations of some kind or is this a general statement for all passive elements? Thanks in advance.
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Impedance Matching required at Output of RF sampling DAC?

I am designing a schematic with TI DAC38RF80. This DAC is having integrated balun and gives single ended output voltage upto frequencies 4.5GHz. Output power of this DAC is less as shown below: In ...
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Attenuator Input Voltage Problem

simulate this circuit – Schematic created using CircuitLab I'm trying to use an attenuator with a PIC32 microcontroller. Basic idea is that; 1) I enter attenuation value through computer 2) ...