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Hello!
I'm having an issue with the attached schematic, and I can't work out what the mistake is. The intention of Q1 is to save battery life by only powering up the micro after the user presses one of the 3 switches (SW1-SW3). Once the user holds a button long enough to power the micro, it...
Are you trying to calculate the power consumption of a physical circuit or is this more of a theoretical practice? The inputs are all high impedance so I don't see why the input settings would affect the overall power consumption. The circuit/IC should have some supply current and the power...
Hey all,
I'm working on a product that currently communicates over a wired Ethernet connection with the host PC. Eventually we want everything to be wireless so we designed in a standard IoT WiFi module but getting the firmware support up and running has turned out to be a much larger task...
Ah I misunderstood you, I though you were offering those amplifiers as a replacement for my driver not for the "mid scale regulator". Thank you for the suggestion, I'll take a look at this as a possible solution.
-Kevin
I guess my issue isn't biasing the output of my driver its where I'm driving current into. The "50 Ohm Resistor" in my circuit is actually the offset cancellation strap of a Magnetoresistive element. At the worst case scenario I need to drive it with a 50mA peak sine wave at approximately...
Hey all,
I have 7 analog channels each of which is going to be driving a 50mA peak signal through a load. The problem is I was planning on using a single ended supply to avoid an extra dual rail power supply. So the driver is powered by a 5V single supply and will be centered around the...
Yes I am in control of the electrical source, the sensor has a drive coil which is driven from another PCB in the stack. The DAC that generates the drive signal is clocked by the same buffered clock as the ADC, not sure if that makes them correlated in any way. How would one go about forcing a...
That is correct, no DC needed. The though of signal transformers had crossed my mind but this open a whole new can of worms where I'm increasing the noise coupled in from the signal driving the sense coil. Not saying its impossible but I just haven't gotten to that yet. I was also worried...
I made this confusing by interchanging units but in the same units the noise is actually 100mVrms out of a 707mVrms full scale input, even worse. However if you take the SNR as the ratio of the power of the signal to the power of the noise its about 34dB, still not good for an ADC thats capable...
This is a bit of a long question so thanks in advance for any insight! I'm working with an inductive sensor that will under some conditions that I need to measure be giving me as little 200uVpp response. The sensor can operate to upwards of 20MHz so the cutoff frequency for any filters in my...
I'm going to test it when I have the opportunity to but personally I'm more interested in learning about the theory behind what I'm trying to do. So far I've been unable to track down the answers I'm looking for elsewhere and usually have good luck here. But thanks for the non snarky part of...
Previously I've been using a DAC and a summing junction to cancel the offset, as long as that is introduced before this gain stage I don't think the increased gain will cause any issues.
Certainly less than 100kHz, I say relatively since currently I'm operating around 20MHz. The application...
If I needed a to gain up an really small signal, say 100uV peak, up to 1V peak. I'll need a gain of 10,000 to accomplish this. Could I practically push all of this gain onto one stage, using an op-amp like the LTC6406? It has an open loop gain of 90dB and I'm only looking for a gain of 80dB. I...
Re: Why would touching a DC/DC converter stabilize it
The input voltage is 15V and this problem occurs both with no load and a 1A load. Is burst mode associated with DCM operation? The chip defaults to CCM operation only and I've verified that by checking the registers.
Is this the input...
Why would touching a DC/DC converter stabilize it
Hey all,
I'm seeing a weird phenomena with a DC/DC converter I'm using, specifically a quad TPS65400. It has four buck converters in one package, three of which are operating perfectly on multiple boards, the same three 1.2V 1.8V and 3.3V...
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