Questions tagged [analog]
Analog circuits have a range of voltages, rather than just two as in digital logic.
3,970 questions
1 vote
0 answers
47 views
SMA Edge Mount Connector Placement
I would like to measure the input/output impedance of some circuits from 1 MHz-200 MHz using a nanoVNA. PCB stackup is Sig/GND/GND/+5V, Sig does not have a ground pour on the same layer. Trace width ...
- 883
0 votes
2 answers
83 views
Signal on/off from MC is analog or digital signal?
Maybe it's very dumb question. But I'm just curious. For example I have On/Off switcher for some LED for indicate that you can start using some device. So this LED turning On from MC and signal rising ...
- 11
1 vote
2 answers
114 views
Solve This Op-Amp Question Using KCL At Nodes
I tried to solve this question by applying KCL at the first inverting node and then applied it to the 2nd inverting node. The answer I got is \$V_o\$ = 66V, which is not possible, and for Point B = -...
- 11
0 votes
1 answer
74 views
How to achieve an output resistance for this cascode that will be smaller then the load resistor?
I have the following circuit in Virtuoso: R_L=100MOhms, and I1 is 10nA. We want to keep VOUT at around 1V, have both cascode transistors in saturation, and achieve an output resistance of the cascode ...
- 405
2 votes
4 answers
256 views
Does op amp input impedance (significantly) vary with supply voltage?
Please refer to the following app note: https://www.ti.com/lit/pdf/sbaa374 It is a resistive circuit in front of a noninverting op amp to scale and level shift an (bipolar) input voltage. I get the ...
- 1,249
5 votes
6 answers
1k views
How to measure audio frequency distortion without expensive equipment?
I'm building some BJT amplifiers, and I'm currently getting distortion values via Multisim simulations. However, I'm not fully sure about the results I've been getting, and I would like to double ...
- 79
-1 votes
1 answer
62 views
How to model and simulate a PCB Rogowski coil (two-halves type) with equivalent circuit in SPICE?
I’m currently trying to simulate a Rogowski coil implemented on a PCB, before moving to hardware design. The goal is to understand its electrical behavior — induced voltage, bandwidth, and the effect ...
0 votes
1 answer
116 views
How to properly read values from CCD linear sensor?
I have a PCB with UPD8872 CCD sensor that I took from an old scanner. I managed to solder the pins of the board to Arduino compatible wires and programmed the Arduino and, also, wrote desktop app that ...
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