Recent content by akhurash

Thanks for the replies. I kind of gave the wrong impression when posting this. I actually want to amplify/scale the DC range of 2.467V to 2.561V to make that range go from 0V to 5V with 2.5V being the mid voltage. Since the voltage is almost pure DC after the LPF (I have three, one active 2nd...

I'm working on a sensor signal conditioning circuit. The sensor output has a 2.5V DC bias with a peak-to-peak voltage swing of about 50mV. The signal output is put through a demodulator and then filter (LPF) to obtain a DC voltage proportional to the out of the sensor. The problem is I need to...

I have solved what I was having trobule with. But I didn't think about the input impedance, :(. Although this shouldn't matter as much for my application.

If anyone is interested in knowing how I got this to work please see the attachment. I'm sorry but I don't' remember where I got that info from or else I would've given credit but that is how to do it. You have add a DC bias to the inputs and in your gain you will always have a positive...

Right now I'm using the LMH6609 because I need an op-amp with high slew rate.

I asked about single supply op-amps here actually and I was told TL071 would be a good start. I tried other op-amps and when I googled for them I was lead to TI and Analog websites. I used the part search on Digikey to try few other single supply op-amps, such as LMH6609, LT1006, and TL084. I...

Hello, I need some help with a difference amplifier design I'm working on. The amplifier has to be work from a positive voltage supply only. I'm having a hard time getting it work with single supply voltage (it works when I use both negative and positive supply voltages). Both the inputs have a...

Does anyone have some recommendations for MOSFET's that can be used for high frequency low current applications? The ones I found are for high current applications but my application only requires at max 20mA. Thank You.

The sensor are driven by a very small AC sine wave (about 100mV, I tried to use 10mV but the noise was high and couldn't get a accurate output signal, this was done in the lab). The sine wave is obtained by using filters and filtering a square wave (the square wave is outputted from a...

What I'm trying to synchronously demodulate is an AC signal from a magnetic sensor. The magnetic sensor outputs an AC signal based on the external field it is sensing; when the external magnetic field changes the sensor output also changes. The DC voltage that is obtained after this AC signal is...

Thank you for the reply es1. The circuit is working in SPICE; I haven't tested it in lab yet. The AC peak-to-peak is about 300mV for each signal before going through the differential amplifier, so I think 3mV offset would be fine for my application. Do you have any single supply op-amp in...

Thank you for your reply berkeman. For the differential amplifier ideally I would like a very low offset and low current, the bandwidth I think would be around 20kHz because there is no gain in the amplifer but I'm not a 100% sure about this. For this amplifer I can only have one single positive...

Hi, I was wondering if anyone knew how to design a single supply difference amplifier... I don't want a comparator or a difference amplifier chip. I need something that will output an AC wave. The inputs of the amplifier are AC sine waves which have slight difference in amplitudes. I designed...

What I mean is that I want to be able to detect a constant field in different temperatures without reading a temperature from a temperature sensor and using a micro-controller.

I was wondering what different method's there are for compensating for large temperature swings in a fluxgate magnetometer and obtain a consistent and repeatable value. I’m trying to obtain this without using a temperature sensor; I would like to use analog or digital components to do this.