Questions tagged [impedance]
Impedance defines the voltage/current characteristic of any dipole circuit.
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Following the leading edge of signal through transformer
I am trying to understand how a transformer can propagate the rising edge of a signal through a transformer and deliver the right current/voltage on the secondary side without first seeing the load. ...
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Simulating feedback effect on input impedance
In the The Art of Electronics (3rd edition) by Paul Horowitz and Winfield Hill, page 302, it is written that
feedback changes input impedance.
Two questions:
Is there some mathematical explanation to ...
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Smith Chart Verification - Transmission Line Load Impedance
I’m struggling a bit with the Smith chart and tried to solve the following exercise. I would appreciate it if someone could check whether my Smith chart construction and reasoning are correct.
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Modelling the load presented by a short stub of centre conductor at the end of a coax
I have a small length of the centre conductor sticking out of the outer conductor at the end of my coax. I want to estimate the load this centre conductor "stub" presents to the coax at 3 ...
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How to impedance match a dipole antenna to 3000 ohm at VHF for a weather radio?
Background:
I am designing a receiver for the US's 162 MHz (approximately) NOAA weather band. I am using older parts, based on the well-known NE602 IC (I actually have the SA612A variant). The input ...
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Why can I not just add function values to get impedance?
If I have reactance that is purely inductive, such that the reactance can be represented by the function cos(t) and have resistance that is represented by sin(t).
I understand that sin(t) and cos(t) ...
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Ethernet pulse transformer: is 350uH required, or can I get away with 150uH?
I am working on an embedded PCB design with three 1G Ethernet connections. Size and weight are at a premium, so I am trying to save space if I can.
I have selected the Bourns Inc PT61020EL pulse ...
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DAC adjustment circuit for driving VGA monitor
I'm designing a circuit that uses a DAC to drive a VGA monitor.
I need to design an adjustment circuit. Here is my interpreted model circuit and interpreted requirements for it:
It needs to set Uvga ...
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Impedance in a parallel LC tank with resistor
I am making an induction heater and would like to emulate the parallel LC topology seen in many online reference schematics. To further understand the concepts, I would like to derive the impedance in ...
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Impedance control vs more space between traces, which to prioritize
When routing parallel digital video signals like RGB888 or YUV422, is it more important to implement 50 ohm single end impedance control or is it better to have more space between these traces? These ...
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What actually creates impedance, or what increases the impedance of a system?
I remember learning in school that electrical devices work because the wires in them are conductive, so electricity flows easily through them. But some electrical things, like (traditional ...
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USB2244 Questions for datalogger with extract capabilities
I am currently designing a PCB with a STM32H723 MCU that will connect to SD Card through a SDIO Multiplexer (TS3A27518EIRTWRQ1) to SD Card to log data. When I insert a USB Cable I change the MUX State ...
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Measurement correction with LCR meter
I would like to correct the values that I am measuring with an LCR meter (specifically the LCR6002 from GW Instek).
I am a bit acquainted with electronics in a very basic level, but here, my knowledge ...
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Would this loading circuit strategy work when connecting circuits in series?
Art Of Electronics, (Paul Horowitz & Winfield Hill) writes:
So a signal source’s impedance should generally be small compared with the impedance of the thing being driven." (Page 44, 1.7.1-D)...
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I thought I understood electrical impedance. But apparently I don't
I've been an EE for a long time, and I thought I had a thorough understanding of impedance. I also know how to perform calculations using complex numbers, phasors, etc. But today I took a deeper dive ...
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