Questions tagged [impedance-matching]
Impedance matching is a process of making one impedance equal to another another.
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How to match multiple impedance discontinuities?
I am trying to design a circuit to transmit various digital high frequency signals over cables, connectors and pcb to an oscilloscope. The simplified circuit looks like this:
simulate this circuit &...
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Impedance of different track widths - Should I compute the average width?
Assume that you having one track that goes from 0.11mm in width to 0.09mm in width.
I want to compute the impedance, but I need to select the width. What option should I select?
The largest width of ...
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RC filter cutoff and impedance
I wanted to create RC lowpass filter with cutoff frequency 15 kHz and output impedance 50 ohm. What should be R and C values? I'm a little confused how to interpret 50 ohm output impedance to ...
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Match 50 ohm impedance to LNA input impedance
I have following PCB version of circuit: on SMA input we have antenna strictly matched to 50 ohm, then we have regular RF switch IC, after RF switch impedance matching network and final stage is ...
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Operational amplifier layout- Controlled impedance
In the following picture, we can see a reference layout by Texas instrument for OPA838:
I noticed, in the polygon on the top layer, they have used a specific gap=0.5 mm, I wonder if they used a ...
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Layer stack up and impedance matching- 100 ohm
I have a 14 layer stack up as follows (the stack up is from EURO circuit):
I need to provide 100 Ohm differential impedance for my LVDS on layer 7, currently by the information from the manufacturer (...
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Calculating output impedance of amplifier to match to 50 Ω
Below is a schematic of an amplifier. The inductor used is a 1 μH inductor, emitter resistor is 2.2 kΩ. The bias resistors are both 200 kΩ. The capacitors are both 1 μF. I am planning to design a ...
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understanding the recommended impedance match for a SAW filter
I'm trying to understand the recommended impedance match for a TA0168A SAW filter input. The datasheet is https://www.rfmw.com/datasheets/taisaw/ta0168a%20_rev.2.0_.pdf
In my first circuit I'm trying ...
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Wideband Impedance Matching for Inductive Source/Load
I'm designing the frontend of a receiver and I want the output impedance to be 50Ω so that I can get as much power into the mixer. I tried placing a bandpass filter (image filter for 88-108MHz) in ...
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Optimal thin absorber of electromagnetic energy
I am a material engineer and have a question about a formula derivation regarding microwave absorption properties. I really cannot figure it out after days of trying. This should be simple for a ...
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Matching circuit for piezo transducer
I am at the stage of designing a system that match impedance of the power output (half-bridge) to a piezo transducer operating at 1MHz (Max 60W of power). I calculated the piezo parameters from the ...
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Is the reason for guitar "tone suck", i.e. loss of high end frequencies with impedance mismatching, actually due to high reactance?
When connecting a guitar's output to an input with insufficiently high input impedance, the signal is undesirably filtered, which is referred to as "tone suck". To deal with this, it is ...
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How to create schematic of common mode choke that reflect on Common mode, differential mode and mixed mode? [closed]
I aim to create a schematic that can replicate the results exactly as seen in the measured S4P file. I have conducted the measurement using a VNA and am attempting the schematic simulation in CST. ...
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How to reduce on-resistance and parasitic capacitance effects of my MUX setup?
I am designing a mux board to mux a flashing setup. Both UART and SPI lines are on 1.8V logic. The Mux chips have ~4-8ohms on-resistance and 1.7pF on-capacitance. Few questions:
Would I need buffers ...
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Coax cables, impedance matching and BNC extensions
I'm trying to understand how to do proper measurements with a Voltage Differential Probe ( TT-SI 9010. This probe has an output impedance of 50ohm and has a BNC (It doesn't specify it in the data ...
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