Unanswered Questions
29,154 questions with no upvoted or accepted answers
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Floating point addition. Are guard, round and sticky bit always necessaryl? analysis of a special case
I've a particular case of floating point addition. As you know for given floating point numbers \$x,y\$ one of the steps of the addition involves the fixed point sum:
$$
s = 1.m_x + (-1)^{s_x \oplus ...
- 14.5k
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350
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Setting up T2080 to FPGA PCie DMA
I'm doing an FPGA design using a T2080 MPC interfacing to an Altera Cyclone V FPGA. The goal is to use my FPGA to pump 2 other FPGAs on the same board.
I need to create a scheme that allows the ...
- 711
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imx6q sabre board microphone
I have been trying to record audio using the circuit below. It is different from the normal microphone circuit in that the MIC_IN and MICBIAS are separate paths. I tried to connect an electret ...
- 711
5
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1
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AVR: Usage of Force Output Compare bits
Currently I'm dealing with Tiny2313 for my project. Timer runs in CTC (WGM12) mode so OCR1A is used to set TOP of the timer. I want to use OCR1B to generate output signal.
In documentation is ...
- 2,444
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1
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Digital circuit that squares a 4-bit input
Many years ago, I found a digital circuit that squares a 4-bit input in an old textbook (perhaps 1970s or 1980s, possibly older).
(The figure below is not the original figure.
I think the figure below ...
- 1,956
5
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1
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860
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Is this a reasonable, robust way for detecting voltage crossing a threshold?
Updated, functional design at the bottom of this question
I wish to detect when a low-impedance signal is below or above 60VDC (±3V). When the signal is above 60V, I'd like to indicate this by ...
CommunityBot
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5
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1
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850
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Switching relay on and off affects analog sensor output voltage
I am working on an AVR project that involves measuring tempereture with an analog sensor (TMP36) and switching a heater on and off through relay to keep the temperature at desired level.
However, I'...
5
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2
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446
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Diode connected transistor for voltage biasing
I am trying hard to demonstrate that the transistor M1 in figure works always in linear region. Transistor M2 is diode connected and consenquently (I am using the EKV model) it works always in ...
CommunityBot
- 1
5
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1
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370
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Can phase noise be averaged out?
I have an ADC sampling a downconverted RF signal at fs. I obtain N=2^15 samples of the RF input signal "fcarrier + fs/10".
The more I average, the more the entire noise floor shifts down (as expected,...
CommunityBot
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5
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1
answer
506
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Parasitic capacitor current of an inductor
I am doing a double pulse test on SiC MOSFETs from 100-800 V and current from 20-80 A. The schematic is shown below (the values are not correct though):
In my first round of tests, I was getting a ...
CommunityBot
- 1
5
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2
answers
326
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How might an LPDDR2 PHY be designed?
I was reading the LPDDR2 spec today out of curiosity. While browsing the spec I became curious about "how might one hypothetically design a minimal working LPDDR2 PHY on paper/for simulation, perhaps ...
CommunityBot
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4
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69
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In a high voltage insulator with multiple discs, when is it advantageous to gradually increase their diameter?
What engineering considerations go into gradually increasing the diameter of dielectric discs for high voltage standoff insulators?
I recall seeing high voltage insulators that had small diameter ...
- 243
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Microstrip PCB Design
I am designing a microstrip PCB with frequencies ranging from 100MHz to 8GHz.
There are no significant issues at lower frequencies, but the signal loss becomes quite high as approaching 8GHz.
...
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Populating MOLEX receptacles at industrial scale
I am a manufacturing engineer charged with implementing process improvements that reduce the total time to build an article. Our volume is such that a one minute reduction in labour results in £1K-£2K ...
4
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1
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Help Identifying a Molex/MATE-N-LOCK style connector
Hoping someone can help as I've spent the last few hours trying to find this specific connector on a number of distribution and manufacturer sites.
The pitch looks like it is around 6.3mm.
It's a 2x2 ...
