Interview Question in analog circuit |
|
|
|
ex:ABAQUS, algorithm design, analog circuit analysis, ceramics, characterization and optimization, circuit design, circuit modeling, CMOS devices, continuum mechanics, c programing, device stimulation tools, elecrto mechanical, epoxies, fatigue, FTIR, fracture and adhesion properties of materials, hardware debug and validation, high speed printed circuit board design, integrated crcuit layout, interface analysis, interface chemistry, labor standards, machine design and fabrication techniques, material testing and characterization, mathematical modeling, metals, metrics development/analysis, netlist extraction, network analyzer, network operating systems, OSI layer 1-7 protocols, packaging assembly operations, perl/TCL scripting, plasma processing, polymers, polymer characterization, polymer physics, polymer processing, process test and optimization, schematic design, SCSP, simulation and layout, solid mechanics, statistical expirementation and analysis, stastistics and data analysis,
|
|
|
|
|
Is there any analog circuit that can take the average voltage of a square wave?
For example, i have a 10Vdc 70% duty cycle square wave.
Is there any circuit or IC that is able to average this square wave signal into a constant flat 7 Vdc voltage level?
Thanks all!
|
|
|
|
|
|
I have an analog circuit. A small signal is amplified by about 400 times. The problem is that the noise is also being amplified. How can I remove this noise other than filters and decoupling capacitors?
Thanks
|
|
|
|
|
|
Analog circuits do not have discrete or set levels of voltages. 0 - 10 volt signal is from a potentiometer is analog (infinate resolution). A 0 - 10 volt signal from a digital to analog converter (like a CD player) divides the signal into a specific number of steps (for example 12 bit would be 4096 steps or 409.6 levels per volt).
Open loop describes a control circuit that does not have feedback to indicate what the end result of the control was.
For example, a DC motor being controlled with a 0-180 VDC rotor voltage that does not have speed feedback would be an open loop analog circuit. There is an expectation that the motor will reach half speed at 90VDC, but there is no measurement data with which to adjust the voltage if it doesn't.
|
|
|
|
|
|
|
analog circuits in electronics field
|
|
|
|
|
|
What I was thinking of building was an expontial function, but I dont know if it would work that way.
What we have in the circuit is a voltage follower connecting to the input the output of that connects to a resistor which connects to an operational amplifyer with a transistor connecting to the resistor to devide the voltage that goes in the transistor's base is connected to the operational amplifyer. In a simular way a resistor and a transistor devide the voltage supplied from suorce (From the operational amplifyer) to a varible amplifyer connecting the other terminal of the operational amplifyer. The last part (Output) is a voltage follower connected to the division of the input.
|
|
|
|
|
|
Ok, I have this triode formula:
Gm = gm*(1/(1+ gmRs)
but I have no idea where it comes from...
I am a computer engineering student and I'm using the equation, but I honestly have no clue where it comes from... any ideas on a proof for it?
hope y'all can help me....
I'm just curious as to what brings forth this equation since I know
(d IDS)/(d VGS) = gm
and Vs = IDS*Rs
but there has to be a link between formulas
|
|
|
|
|
|
I'm in a lower-division electrical engineering course that covers basic DC circuit analysis (KVL, KCL, Thevenin, Norton, Opamps) and AC analysis (phasors etc). I haven't been doing too well on my midterms and I was wondering if anybody had study tips for a class like this one. The annoying thing is that I feel like I understand the material, but when it comes to the test I get tripped up by tricky things/ details.
For reference, we are using the text Introduction to Electric Circuits 7th ed by Dorf and Svoboda.
|
|
|
|
|
|
One of my faves:
"The Art of Electronics", by Horowitz and Hill
This book is probably on the shelf of 95% of electrical engineers, who are electronic designers. It is a great all-around book for electronic design and it covers a lot of subjects very well.
.
|
|
|
|
|
|
|
Other than noise-filtering, what is the purpose of a capacitor? It acts like a voltage source for a small amount of time. Can someone explain the uses of a capacitor, other than storing energy in an electric field. Explain in terms of capacitor's relevance in a circuit?
|
|
|
|
|
|
I was working on my uncles electronic shop 99-2000 as part time , Can you tell me how to word the following so it will sound professional in my resume ?
I used multi – meters , digital oscilloscope and function generator to test digital and analog circuit . I also used a DVM ( Digital Volt Meter ) . I also know how to use a spectrum analyzers. Also routinely used common software applications such as MS Word and MS Excel MS Power Point to produce reports and graphs that was required.
Proficiency in reading and interpreting mechanical, optical and electrical specifications using drawings and manuals
|
|
|
|
|
|
I was working on my uncles electronic shop 99-2000 as part time , Can you tell me how to word the following so it will sound professional in my resume ?
I used multi – meters , digital oscilloscope and function generator to test digital and analog circuit . I also used a DVM ( Digital Volt Meter ) . I also know how to use a spectrum analyzers. Also routinely used common software applications such as MS Word and MS Excel MS Power Point to produce reports and graphs that was required.
Proficiency in reading and interpreting mechanical, optical and electrical specifications using drawings and manuals
|
|
|
|
|
|
I worked for my uncle from 99 till 2000 in his electronic shop . It wasn't a great job , but I needed the money .
But now I am trying to apply for a better job , so I can take care of my family
But i'm stuck on how to write this following in such a way that will get me an interview .
this is what I did there in his shop , i dn't remember the title . What do you think I should write as a tite?
I used multi – meters , digital oscilloscope and function generator to test digital and analog circuit . I also used a DVM ( Digital Volt Meter ) . I also know how to use a spectrum analyzers. Also routinely used common software applications such as MS Word and MS Excel MS Power Point to produce reports and graphs that was required.
Proficiency in reading and interpreting mechanical, optical and electrical specifications using drawings and manuals
I
|
|
|
|
|
|
I was working on my uncles electronic shop 99-2000 as part time , Can you tell me how to word the following so it will sound professional in my resume ?
I used multi – meters , digital oscilloscope and function generator to test digital and analog circuit . I also used a DVM ( Digital Volt Meter ) . I also know how to use a spectrum analyzers. Also routinely used common software applications such as MS Word and MS Excel MS Power Point to produce reports and graphs that was required.
Proficiency in reading and interpreting mechanical, optical and electrical specifications using drawings and manuals
|
|
|
|
|
|
|
The easiest way to explain this is that an analog circuit uses varying levels of voltage or current. A digital circuit has only two states, on or off, and it sends out a series of pulses.
|
|
|
|
|
|
I have started reading a robotics/micro-controller book, but have not reached the motor or digital to analog sections yet. From what I have read, I know the pins can output 0 to 5 volts, steady or at different pulse rates. Then theres digital to analog circuits, step motors, DC motors, AC motors, and infrared sensors that can read a pattern on the wheel and therefore calculate an angular velocity that can be used as feedback.
From all these tools, what is the typical method for controlling a motor's speed? What is the best motor to use? Should I drive it with pulses (PWM I think) or an anolog signal? Are there pins on some micro-controllers that can directly accept the analog signal from the infrared sensor?
I'm looking for a general explanation from somebody who has experience in building amatuer robots.
For your information, I'm looking to eventually buy A-Wits Technologies C-Stamp.
|
|
|
|
|
|
|
Digital is more practical these days, as more and more circuits become more and more complex. Your iPod Nano has NO analog circuits in it, except for the headphone output and charging circuits (possibly). Analog is bulky, expensive (now) to produce, and limited. However, digital cannot exist without some sort of analog circuitry, either inside the chip itself (ie, IC) or on the board. You choose what you like. I take it that you are asking because you are confused on what classes to take? Probably it would be in your best interest to go digital. Everything is digital these days. However, if you ask me...analog is more fun.
|
|
|
|
|
|
|
I am wondering how electrical circuits and systems are actually designed in the real world. Is there a formal process that goes into designing a circuit for a particular purpose? I have heard of electronic design automation for digital circuits, but how is this actually done? What about for analog circuits? Power systems? Thanks!
|
|
|
|
|
|
A digital circuit is based on a small number of (usually
two) distinct voltage levels -- consider these high and low
or 0 and 1. Contrast this with analog circuits which are
based on a continuously variable signal.
The typical digital circuit has (conceptually at least)
two states, 0 and 1, and are designed using boolean
algebra (think AND, OR, NAND, NOT gates).
Contrast that with an analog circuit, which instead
of interpretting "high" voltages as "1" and "low"
voltages as "0", interpret voltages (at least
conceptually) as a floating point number.
The circuits have very different characteristics.
An analog signal often has some amount of signal
loss (think of the "hiss" from old analog phonograph
records), but they degrade gradually (ie. they
slowly get more and more noisy, but can often
still operate even with significant signal loss).
A digital circuit, however, will typically have
*no* noise because they often have error correction
built in to handle up to some threshold of signal
loss. However, at some point, rather than degrading
gradually, they just fail. Consider the difference
between the older-style cell phones (which would
sometimes get a little "noisy") vs. current digital
signal cell phones which are usually crystal clear
until they just "cut out". That's a common signature
of digital vs. analog processing.
For more discussion, see the wikipedia entries for
both "digital circuits" and "analog circuits".
|
|
|
|
|
|
If I have discrete data from a A/D converter, is there an algorithm or transfer function to apply to the digital data to simulate going through a simple analog resistor? or any other type of basic component for example?
i'm interested in learning how to digitally simulate an analog circuit.
|
|
|
|