Recent content by satchmo05

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    BJT Transition Frequency for a High-Frequency Design

    Hey all, If I understand correctly, transition frequency is synonymous with the unity-gain bandwidth frequency. With that said, if you divide the gain at the operating frequency by the transition frequency, you should get the operating frequency. Please correct my logic if I am incorrect...
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    Unraveling the Mystery of Copper Resistance Values in AWG

    Oh wow, that's embarrassing. Thanks for the second set of eyes. I've been staring at that very simple equation for 20 minutes and I just couldn't get anywhere. Most appreciated.
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    Unraveling the Mystery of Copper Resistance Values in AWG

    Hey all, I am looking at the American Wire Gauge chart listed on Wiki (http://en.wikipedia.org/wiki/American_wire_gauge"]).[/PLAIN] I am attempting to determine how they are getting their copper resistance values. From my education, DC resistance is equal to...
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    Impedance Matching for "Electrically Short" Coaxial Lines at 125 MHz

    I guess what I should've asked is when do I not have to worry about impedance matching, in terms of transmission line length? When less than 0.25 lambda? When electrically small (< 0.1 lambda)? My reasoning there was more of a length issue: attenuation constants, line capacitance, line...
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    Impedance Matching for "Electrically Short" Coaxial Lines at 125 MHz

    Hey all, Between two devices, I will need to have a coaxial line (with SMA connections on either end) connecting them. The operating frequency of the signal I am propagating is approximately 125 MHz. With this said, the wavelength (assuming ideal) is 2.4 meters. I have heard from numerous...
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    Needing a simple microcontroller to program ADC0831

    Thanks vk6kro, The part seems like a great find for my application. Cheers, - Satchmo05
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    Needing a simple microcontroller to program ADC0831

    Hi all, I am building a LED tomography system (think of it as a simple transmitter and receiver). I would like to do signal processing on the received data, so I am needing to convert my analog, received signal to a digital signal. The ADC I have chosen is the ADC0831 (DIP package). The...
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    Sketching Fourier Transform of Lowpass Filter with Time Delay and Bandwidth

    rootX, Thank you for your response! I believe I understand the magnitude of the response. The magnitude is simply a function of the lowpass filter itself, drawing the bandwidth as given where the function's bandwidth breaks at the corner frequency (-3db). I do not believe the time delay...
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    Sketching Fourier Transform of Lowpass Filter with Time Delay and Bandwidth

    Homework Statement Let h(t) be impulse response of unity-gain ideal lowpass filter with bandwidth of 50[Hz] and a time delay of 5[ms]. Sketch magnitude and phase of Fourier transform of h(t). The Attempt at a Solution I know that the magnitude2 of H(f) is total power gain, so perhaps by...
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    Electronic Masking Research: Hypothesis Ideas

    so I am starting to work on research in electronic masking... What applications of this topic could I draw a hypothesis from? I'm having trouble finding a potential hypothesis/thesis topic. Thanks!
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    Verification of Laplace transform answer

    Homework Statement Find the Laplace transform of the time function using the integral definition: g(t) = e-a(t+T)*u(t+T) Homework Equations Laplace transform definition The Attempt at a Solution After working through it, I was curious to see if the answer I received is, in...
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    What is the Sampling Period Range for Recoverable Signals?

    I am pretty confused at what you're trying to hint at here. I appreciate the help, but my mind is still blank.
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    What is the Sampling Period Range for Recoverable Signals?

    The Nyquist rate, to sample at the perfect rate (without aliasing/oversampling to occur) - it would be = 2fmax
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    What is the Sampling Period Range for Recoverable Signals?

    I can see where convolution comes into play, but how can I implement the CTF transforms that are given?
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    What is the Sampling Period Range for Recoverable Signals?

    Homework Statement The signal y(t) is generated by convolving a band limited signal x1(t) with another band limited signal x2(t) that is y(t)=x1(t)*x2(t) where: --> X1(jω)=0 for|ω| > 1000Π --> X2(jω)=0 for|ω| >2000Π Impulse train sampling is performed on y(t) to obtain: --> yp(t)=...
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