amplifier

Hello, I need to simulate the following circuit in LTSpice. I made the scheme but I don't know what value to choose for R2 and Cinf in order to have theoretical gain Av=1500. The following constraints are imposed: Vcc=10v; VCM=1.5V; vg it's a sine wave with a frequency of 1Khz and R1=15kOhms. I...

Hello, I've read something about a rail-to-rail opamp on the internet and I want to design one, just the soft part, and I am not sure if I get some things right. For example: Let's assume that my Supply Voltages are Vss = -5 V and Vdd=5 V In a rail-to-rail op amp I need my input to be anywhere...

I'm not sure if this has been posted somewhere before, but I can't find anything that really addresses this type of a problem. For college we need to design an amplifier circuit using a transistor, this is not that bad. The problem is that there is no proper explanation that I can find of where...

So I have a project I'm working on a project to light these "NFC fingernail lights": They light up when in the presence of a 13.56MHz RFID field. The issue is other than my phone, I have no way to light them day to day. I would like to develop a device I can hold, like fist semi closed and it...

Hello, I need to implement the following circuit in LTSpice but I don't know what VCM, Vg,VCC and C infinite are...Can you help me with the symbols for it? Also, the scheme implemented by me it's ok? Thanks!

Okay so my question relates to biasing and threshold voltage in a MOSFET amplifier. So in an amplifier the clipping occurs when the signal hits the power rails according to all the reading I’ve done. That’s how much voltage swing you supposedly have before clipping. So if you have an 18 volt...

Hello i am thinking of making a Bluetooth sound bar out of my old laptop lenovo laptop ( ideapad 510) internal speakers, from the internet i learnt that you need to change the digital signal to analog and then amplify the signal before connecting it to the speaker. I am a little worried about...

I made a pre-amp audio circuit but it doesn't seem to work. I want to amplify an audio signal so that it has a DC offset of 1.8V. I tried to simulate a similar circuit in KiCad and the simulation seems to work ok. Below is the circuit I designed and assembled. On the scope, the voltage is as...

Hi there, Recently, I have designed a new charge amplifier than can be used to implement a precision and low-cost interface for piezoelectric sensors. I have published an article about the novel proposed circuit in IEEE Sensors Journal. ( A brief information about the new proposed circuit has...

I have a design for an EMG (electro-myograph) that needs some stability assistance. The core components are an LT6370 in-amp, and an OPA2192 dual op-amp package for amplification and generating a stable reference. The reference is set by a capacitance multiplier that seems solid as a rock when...

Hello guys. This is my first post. I recently got these speakers for free, and right away i notices the speakers have no output sound at all, completely silent. First thing i did was a inspection of the board, which looked perfectly fine. After i plugged the original adapter i hear a small pop...

So this port is broken and i cant find another one like it anywhere. maybe im looking for the wrong component since im not that good with components yet. Its a mchammer 1200w markII amp if that helps anything. is there any way i could fix it with just buying a single new port. i think it is...

Hello everyone I need help please I dont have 2n4401/2n4403 Also irf540/irf9540 What can I exchange for them? I have added a picture to the circuit

I have an analog signal of 1V peak to peak that sweeps about 0V. The frequency of the signal is between 500 & 1000Hz. I need a circuit that shifts and amplifies the signal to 0.5-2V. The supply is +-10V. I'm finding it hard finding stuff online to help. If anyone could point me in the right...

Hello! :D I have a 1w intercom speaker I want to amplify. Issue, I have no idea how much power is going to this speaker from intercom and how to step up power to accommodate a larger, more loud speaker. Any help much appreciated. Attached is pic of small 1w speaker. I want it louder to a 1.5"...