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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    Why is my calculated copper resistance for #6 AWG four times too low?

    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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    Why is my calculated copper resistance for #6 AWG four times too low?

    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)=...