opamp

Hello, I have been tasked to build a Voltage stabilizer (220V, 50Hz). Now I am newbie at this and I dont want to offend anyone here (lol) but I have used Google Gemini to build a circuit. I have made the circuit in proteus 8 but it shows some errors for reasons unknown, gemini tells me its...

I'm using LTC6268-10 to build a ~200MHz TIA (Transimpedance amplifier) Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/626810f.pdf Here is the schematic: The frequency response I get: I expect the bandwidth to only roll off at 250MHz, why does it fall to -3dB...

I want to use an off-the-shelf LPWAN radio product -- which has mesh networking capability and features an embedded microcontroller -- to sample a 12V battery's voltage. I don't want to do it often, so I'll configure the radio's interface to do synchronized sleep routines to wake it up and...

I have designed a 2nd-order Sallen-Key filter with a 3 kHz cutoff frequency using the OPA4863PWR. I wanted to check whether, similar to ideal vs practical integrators, there are any non-ideal effects that need to be considered here. Specifically, do factors such as finite gain-bandwidth, slew...

Hello there, The backgorund: I'm working in an audio module using an electret microphone and a MAX4466 amplifier, I'm using the layout recommended in the MAX4466 datasheet (datasheet Figure 2), with the only difference being there is a 100 nF cap between the MIC+ and MIC-, the presence of said...

Hi, I'm trying to build a circuit using an IL300 optocoupler. My application is to read an input voltage in the range of 0V to 2V. I followed the IL300 application guide and built my circuit according to the photovoltaic configuration (as suggested in the app note). I'm simulating the circuit...

您好，我用的是LT1028，做超低噪声前置放大器。不知道我的SCH（电路图）有没有问题？请帮我检查一下，谢谢！

Hello everyone, I'm building a circuit to measure current. The main idea is to use a current transformer (CT) to step down the current and then measure it using three different op-amps with different gain levels, connected to the ADC channels of a microcontroller. The goal is to detect leakage...

Like after building l amplifier of that will produce some volts output can I test the same with a voltage source of 0 to. 30mV instead of actual device ? How will the circuit behave?

Hi everyone, I'm trying to implement this active low-pass filter using a TL072CP. I have simulated it in LTspice, and its behavior is pretty much what I expected. However, when I assemble it on the breadboard and analyze its Bode plot, it appears more like a high-pass filter with poor gain...

I'm working on a problem with an operational amplifier circuit . The exercise is as follows: "Determine the effect of the operational amplifier’s input bias currents on the output voltage and find the relationship between resistors". I understand that bias currents cause a small offset in the...

Hello everyone! I'm extremely confused about this and I was looking for advice, I'm sorry if this is the wrong place to ask. I have the following inverting operational amplifier with these values: - Rs = 1k ohms - R = 10k ohms - C = 10 mF - Aol = 74dB - Zin = inf - Zout = 5 ohms I need to...

Hello, I am designing a low cost solution for measuring voltage on the mains 220V with a precision target of 0.1V. My requirements are 4kVrms galvanic isolation between mains and the low voltage circuitry. I am measuring the output signal using an esp32 The transformer should be small and...

While observing the audio output of my smartphone on the oscilloscope, I noticed a signal being generated when I touch the touchscreen. This signal is around 500Hz and appears in groups of 3 peaks, with intensity proportional to the skin/touchscreen contact area: The output is from an AUX cable...

I'm trying to design a analog square root sub circuit to process an input voltage and output sqrt(vin). I want to Use something other than a log and antilog amplifier with a voltage divider in between but I'm really struggling to design an alternative as I am still learning. I have tried a...

Hello, i hope this is the right place to post this. Im using TS358CD C3G opamp to measure the current thru a resistor (1R). the poblem im having is that the output voltage wont change when the current increases. In a previous version, i was using the TLV9352IDDFR opamp which worked fine, the...

Hello guys! I'm trying to build a small circuit that can detect a faulty microphone or an intermittent microphone. It is meant to be used with lavalier microphone. So I asked chat GPT for ideas (yes aha) and it came up with this. Does it make any sense? I tried to put it quickly on a breadboard...

I have an OPAMP circuit that its output increase steadily without cahnge in the input. I guess the issue is in the transfer function of the circuit and its stability. I want to calculate the transfer function of my circuit but I do not have any idea about that. Could you please help me to...

Hi, I am under a internship and my supervisor wants me to practically measure the slew of AD8602ARMZ op-amp. I am aware that this value is available in the datasheet along with a well plotted graph, but my task here is to recreate the graph on the oscilloscope. So far I have read the basics of...