# Questions tagged [circuit-analysis]

Circuit (Network) analysis is the process of finding the voltages across, and the currents through, every component in the network. Consider using in conjunction with tags for the particular analysis technique(s) in question: "nodal-analysis", "mesh-analysis", "superposition", etc.

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### RC series analysis with H parameters model

I'm writing this just to be sure I understood well the process of analysing a circuit with the $H$ parameters model. In this case, it is a very simple example of application; the circuit I'm ...
120 views

### Is my solution to this differential receiver circuit calculation correct?

I solved the difference receiver circuit problem in the picture with the following formula but I am not sure of its correctness because I do not have an answer key. I would like to discuss whether it ...
109 views

### Why does the author assume $R_{in} = 1/ g_m$ for this this circuit?

The following circuit is from Chapter 13 of Analog Design Essentials, page 1324, written by Willy Sansen. Calculate $R_{in}$ for this circuit. The author thinks $R_{in} = 1 / g_m$ However,  -...
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### Device Power On Reset Requirements in SoC

I need to release the RESETn signal after all power supplies and clocks are stable, and de-assertion should be at least 100 ms (I'm using 47nF in CT to create delay of ~200ms). My idea is to connect ...
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1 vote
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### Why does the opamp output not swing to vdd or vss in the simulation?

Why does the output of the opamp not rail to VDD or VSS when the positive feedback factor (2/3) is larger than the negative feedback factor (1/2)? ...
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### How would I convert this to a perforated circuit board? [closed]

How would I go about converting this schematic to perforated circuit board? For example, how would I connect the battery to the op amp?
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### Help needed with RC Phase Shift Oscillator Analysis

I simulated the following circuit from page 439 of “The Art of Electronics, fig.7.23”. It works fine and outputs $\approx 1\ \rm{kHz}$ as expected. My question is around the theory, I expected the 3 ...
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1 vote
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### How to implement a blinking led circuit that is dependent on its voltage input?

I am designing a circuit with two LEDs, where one LED will blink when the output voltage (Vout) is 5V and the other LED will blink when Vout is grounded. I am confident in the functionality of the ...
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1 vote
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### Needed Assistance - EMI Issues with 16x2 LCD Display (Model BCB-1602-03C)

Hello stack Exchange Community, I am Yogesh D from Trident Pneumatics Private Limited, R&D Innovation - Electronics. We are currently using a 16x2 LCD display (model BCB-1602-03C) in the ...
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I am simulating the following Sub-ADC circuit which is intended to be used in a pipeline ADC. The following is my simulation result at nodes VIP, VIN and CMP+. I applied ramps at VIP and VIN in an ...
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### Trying to understand this wah pedal schematic

I want to build a Wah pedal following the tutorial linked. I am confused on why there are two voltage sources and why the one on the left does not connect back to the main circuit. The materials list ...
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### How to find current for Thevenin equivalent circuit

I'm trying to figure out how to calculate the Thevenin equivalent circuit for a voltage divider like the following one: I understand that V_th is obtained by opening the terminals of the output, so ...
1 vote
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### A question regarding the distributed RC π model

In Rabaey's Digital Integrated Circuits: A Design Perspective, Figure 4.62 shows the distributed RC network to be modeled after the π model. What I'm unclear is for the π3 model, the capacitance is ...
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### Matlab Ramp Source and Simulation Time

I am using Matlab and Simulink to simulate the behavioral function of an ADC. I applied a ramp input to this ADC using "Ramp" in Simulink and ran the simulation. This is what I noticed from ...
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### Transformer with same size symbol meaning

I Know these symbols mean a transformer step up or down: But what does this one represent since it has the same size on both sides? Part above taken from this schematic: And this also has me ...
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### Can we find the equivalent resistance just by using series and parallel combinations?

Can we calculate the equivalent resistance between $A$ and $B$ by using just the concept of series and parallel combinations$?$ I can solve this by assuming that a battery of voltage $V$ is ...
1 vote
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### Is there a DC voltage on a transmitter power amplifier's output?

When studying the answers to Are my power calculations on this MOSFET Power Amplifier accurate? , I noticed this contradiction: If you integrate V * A, you get ...
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1 vote
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### Polyphase full-bridge rectifier formula

I am learning circuit analysis/design as an hobby, and I came across this circuit schematic while practicing. The phase differences between AC sources are 120 degrees. I am using the three phase full-...
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### Why does this LED turn on?

Context: I have designed a custom data acquisition board around the MAX11046 ADC. While troubleshooting my previous problem I discovered some unexpected behaviour. Here is the schematic of the ADC ...