Questions related to Electronics Design
Can you give me a solution about how to export high quality figures from MATLAB Simulink for inserting in MS Word. The generated circuit line in Simulink needs to be clear and bold that preferable for publication. After Drawing the circuit by default setting seems lines are very thin after COPY.
Looking forward to hearing from you.
I have been trying to research to develop a cascade CS CS Low noise amplifier on keysight ADS. I haven't been able to find a direct reference for such LNA.
I would appreciate your assistance
If you refer to the images attached of opamp, one is open loop config of opamp and the other is the closed loop config of opamp. In both of these equations, the formula to obtain output voltage remains the same including the common mode signal affects. However, the Adm term, called as the differential gain of opamp or the circuit, in open loop config refers to the open loop gain of opamp while the Adm term in the second circuit refers to the closed loop gain of opamp. The books I have referred are: Microelectronic Circuits (Seventh Edition) by Sedra Smith, and Op-Amps and Linear Integrated Circuits (Fourth Edition) by Ramakant A. Gayakwad.
Is the reason because the Adm and the Acm in the first circuit refer to the differential gain and the common mode gain of the circuit and the circuit is opamp itself so Adm and Acm are the differential gain and the common mode gain of the opamp itself? While in the second circuit, the Adm and the Acm are the differential mode gain and the common mode gain of the whole circuit? But I saw in Sedma Smith that for the second circuit, output voltage formula of opamp being used in terms of open loop gain without including the affect of internal common mode gain of opamp.
Hi! I am trying to convert a fully-positive 50Hz square wave into a flat signal using a low-pass filter. However, I can't find any reference to identify the minimum cut-off frequency. How can I do this?
I have designed a bilayered structure on CST which is having copper patches as upper and bottom layers and a substrate sandwiched in between but I want LC equivalent circuit for the whole structure.
RRAM device consists M-I-M (Metal - Insulator - Metal) structure and in most of the RRAM device insulating layer plays important role in resistive switching between HRS (High Resistance state) and LRS (Low Resistance State).
I have a high aspect flexible aircraft wing of 2 meters in which I want to place 6 gyroscopes along it to measure its deflection for research purposes. I want to be able to collect all the data effectively at 100Hz frequency from all the gyroscopes ( at the same time) to feed an estimator . It is not an easy task to do because I need communication protocol to be fast, robust to noise generated from BLDC motor, works for long distances and cheap.
Please see specs below :
- The longest distance between the control unit and any IMU will not exceed 2 meters.
- The Data collected from all the IMU’s should be relatively at the same time.
- The communication protocol that to be used should be highly robust to noise.
- The protocol to be used can be adapted with available microcontrollers.
- Data should be collected at 100 Hz frequency in control unit (T sampling = 10 ms).
There are alot of IMU sensors which can be used from adafruit, sparkfun or silicon labs. Currently i have two candidates thunderboard sense 2 and Razor sparkfun IMU in which both can be used as a sensor and a microcontroller at same time since they have arm processor and can be programmed.
Any one can suggest a suitable way to connect and interface with these sensors?
Any one can suggest a cyber physical system in which we can connect these sensors in a specific architecture in which we can gather data with interrupts respecting the above specs?
Many groups are building actuators and exoskeletons without considering the safety standards as from prospective commercially approved products.
The question is: what standards have to be followed for mechanical and electronics design of actuators and respectively exoskeletons ?
Which ones do you use?
For ex: max torque, voltage, current, weight, bending angles, gaps (between the cover and moving parts) and so on.
I am tasked with building a low cost back scattering probe that can be used for fluorescence or Raman alike. My expertise lies in front end electronics design and I haven't had a lot of exposure to optics and optical instrument design. My setup right now looks like this as shown in "Setup.jpg". I am using a free space 784nm laser with ~2nm FWHM and about 2mm beam diameter. I am feeding this to a cube beamsplitter (https://www.thorlabs.com/thorproduct.cfm?partnumber=CCM1-BS014). The beam exiting is fed through a long pass filter @800nm cut on (https://www.thorlabs.com/thorproduct.cfm?partnumber=FELH0800). The output beam is then fed to a spectrometer using a focusing optic. With this setup, the spectrum collected looks as shown in "784nm_Spectrum.png". I don't know what to make of this spectrum. There is the peak @784nm due to laser but I would have expected there to be a "flat" spectrum after 800nm. Instead I see this weird "decaying" pattern. The spectrometer has been calibrated and should not cause any error. Please have a look and let me know if you have run into something similar or what you think it could be. I am a bit clueless at this point.
Nutrition related diseases are nowadays a main threat to human health and pose great challenges to medical care . A crucial step to solve the problems is to monitor a daily food intake of a person precisely and conveniently . Can use a wearable device to monitor and recognize food intakes in daily life ?
I have a modulator that through an inductive link, I send my ASK modulated data to the secondary coil and on the secondary part, with some circuit I detect my data, now I want to compare two transmitted data and received data together and calculate bit error rate, as a transmitted data I put an LFSR circuit in the transmitter circuit and use PBRS5 (a pattern of random data producer) .I think that I need some digital electronics information that determine to me how to get data and compare it to the transmitted data. I used serial port for example RS232 to get data. but because of start and stop bit of serial port it was not true(because my random data is not in serial format, it is millions bits of random). so what port should I use and how calculate the bit error rate. I want a true and simple method to calculate this parameter practically.
I´m working on an analog active crossver in the audio range and need to achieve zero phase (or close to it) in the pass band. I have tried several prototypes but now I discover several differences between the real components (opamps) and the simulations (i tried a 5532 from internet and the 741 from Texas and both showed differences, one in amplitude and the other in phase).
I´m a bit stuck and don´t know how to face this challenge. I already asked in facebook groups, linekdin and here at university, but I´m not clear about how to fix simulation issues and how to organize the design process. This is my first electronics design job, so any help will be appreciated.
Generally in pollution induced flashover of porcelain insulators, if the bottom is more polluted compared to the top, then the movement of arc starts from pin towards cap. Under such nonuniform cases, why with increase in the ratio of ESDD at top to ESDD at bottom does the pollution flashover voltage also increase?
I want to do the performance analysis of flip-flop with different data activity i.e at 0%,25%,50% and 100%. what should be the data input and clock input for flip-flop. I am little bit confused regarding this. Need Clarification. Thanks
Could you please explain me how to measure the Early Voltage of a BJT experimentally in lab (Undergraduate Electronic Devices Lab)?
I am also interested to know the different parameters of a BJT (in addition to Early Voltage) that can be measured experimentally. The typical input and output characteristic curves are common experiments, but what additional measurements / observations can be added to these experiments with BJT?
In differential LVDS clock, signals on output pins are equal and opposite in polarity and hence get added at the receiver end. but when I add a AC coupling capacitor to each pin of driver IC to shift the switching threshold at receiver, then one signal at receiver side changes its polarity, hence no more a differential pair. I don't figure it out that how signal polarity get changes with deploying a capacitor. A capacitor is only suppose to change the dc level of signal.
Because I am not a native english speaker I am not quite sure about the difference (if any) between those two terms. Can anybody explain the difference in usage?
The careful selection of coatings and substrate materials based on the service exposure of electrical equipment and controls can improve the reliability and cost effectiveness of the entire system.
Since sometimes we don't have layout drawing tool for the given technology node (say 22 nm or 16 nm) .
And also it is very difficult to draw layout to determine these capacitance especially when we only concentrate on spice simulation of the circuit. Is there any analytical method
I have a cantilever steel beam of 1m length. I want to determine the strain near fixation due to the bending moment of a dead weight on the tip of the beam.
I plan to place 3 strain gauges near fixation and close to each other on the same line level.
I have some doubts about managing the data. Shall I take the average reading and consider it representative of the strain on the beam?
I believe that each strain gauge measures the strain in the zone it is placed on.
How can I simulate a critical path with input pattern (how can I know the input pattern which simulate the critical path and)?
I am supposed to excite the bridge circuit with 1 kHz of frequency in order to get data from it. The variable part of it would be strain gauge. Can you suggest me which oscillator circuit I should use?
Since few years the work on Fully Depleted SOI (FDSOI) device technology have been interestingly increased due to few Semiconductor Companies believed to have a reliable and cost-effective production with FDSOI in compare with FinFETs/bulk-CMOS (e.g. ST-Mircoelectronics co. in conjunction with CMP is already in production phase of FDSOI tech.).
1. So, if anyone could suggest the freely available predictive technology model (PTM) and/or Product Design Kit (PDK) either charge or surface potential based ; will be highly appreciable.
2. Is it even possible to have "charge-based" SOI/PD-SOI/FD-SOI technology models. Or all the companies are using "surface potential - based" such as PSP based models.
I want to work on Power Delivery Network of an electronic device (microprocessor/silicon chip). Please share your valuable suggestion and guidance to work on this field.
Thanks in advance for helping me.