Activity for MissMulan
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
$Q$ and $\overline{Q}$ in bistable multivibrator In this bistable multivibrator which is $Q$ and which is $\overline{Q}$? (more) |
— | over 2 years ago |
| Answer | — |
A: A signal with one mode or with three or more modes > The term "Discrete" uses to describe a signal with two modes. Wrong. Discrete means it can only take some values , not all values. I suspect by 'modes' you mean # of possible outputs. If we have a system which outputs only have 1 possible output then what would be the point of that system?... (more) |
— | over 2 years ago |
| Question | — |
Tunnel current equation The current through the tunnel diode is: hi where $I{f}$ is the current from the Shockley diode equation and $I{tunnel}$ is the tunnel current. Is there an expression for the tunnel current or is it found 'experimentally'?[]() (more) |
— | over 2 years ago |
| Question | — |
Adding resistance to varactor circuit If we a varactor and we want to control let's say the resonant frequency of the circuit ,in my schematic we must add R1 correct?Else we create a low resistance path for current to flow not through the varactor so the "AC circuit" gets distorted from the "DC circuit". hi So by changing the val... (more) |
— | over 2 years ago |
| Answer | — |
A: 3+3 doesn’t show 6 The correct 1 bit full adder is this:hi (more) |
— | over 2 years ago |
| Question | — |
3+3 doesn’t show 6 I have a problem which I don’t understand how to solve. I have this 2-bit adder, but when I select A1AO to be (11)2 3 and B1BO to be (11)2 3 and run it on Logisim it doesn’t show me 6. Instead it shows me 4. How can I fix it? hi (more) |
— | over 2 years ago |
| Question | — |
Division of binary numbers logic circuit If we want to divide two numbers I have problem implementing this logic.I am posting 1 images with 2 different steps to the solution. In example a) the most significant digits of the divident >= divisor we subtract the divisor from those 2 digits. hello In b)the most significant digits of th... (more) |
— | over 2 years ago |
| Question | — |
2 bit subtractor using full subtractor Can we make a n-bit subtractor using full subtractors or if we want do subtract one binary from another we must use full adders and use the complement of the 2nd number to do the subtraction? I have only found examples which we use the complement of the second number and using full adders if it is... (more) |
— | over 2 years ago |
| Question | — |
Electric circuit with antenna Moderator's note: This is getting ridiculous. You keep posting these drawings that are barely legible. The scribbling is bad enough, but the uncropped images are unacceptable. The image you originally posted below was 2500 x 1667 pixels, even though the drawing occupied only a small piece of th... (more) |
— | almost 3 years ago |
| Question | — |
JFET equation of current Is this equation valid only when a JFET in saturation mode , correct? because in the ohmic region the JFET acts like a voltage controlled resistor and increase in VDS increases the resistance of the JFET. Hi (more) |
— | almost 3 years ago |
| Question | — |
Diodes used in mixers Suppose we have this circuit which is supposed to be an unbalanced frequency mixer. But how does the diode generate a signal with new frequencies at the output? Hi (more) |
— | almost 3 years ago |
| Question | — |
Extract DC component of mixed signal How can we extract a DC signal from a mixed signal?If we want to extract the AC component of a signal we can use a blocking capacitor to remove any DC offset but how do we achieve the opposite?Can we use a band-pass filter? (more) |
— | almost 3 years ago |
| Question | — |
MOSFET differential to single ended converter intuition How does the differential to single ended converter work? In order for the circuit to work, Q1 and Q3 must be in the saturation region and depending on the voltage inputs, one of Q2 and Q4 will be in the ohmic region and one will be in the saturation region. I understand that IQ1 is copied to (... (more) |
— | almost 3 years ago |
| Question | — |
Voltage of tank circuit is invalid In a previous question we found that for a critically damped oscillation: $$ I(t) = 2 t e^{-0.5 t} $$ But if we integrate to find the voltage through the capacitor: $$ V{CO} + \frac{1}{C} \cdot \int0^t{I(t)}dt $$ the integral is always a positive value which doesn't make any sens... (more) |
— | almost 3 years ago |
| Question | — |
Capacitor in 2nd stage of opamp Inside a op-amp after the stage where the differential signal is converted to single ended , there is further amplification of the DC signal.For AC signals there is a capacitor parallel to the transistor.Why is it there? (more) |
— | almost 3 years ago |
| Question | — |
Critically damped oscillation issue I have a question about this circuit:(critically damped oscillation) SeeMe For a critically damped oscillation for a series RLC circuit the equation of current has this form I(t)=D1te^(-at)+D2e^(-at) where D2 =I(0+) and D1-aD2 = dI(0+)/dt=VL/L. Due to L1 :I(0)=I(0+)=0A and by applying KV... (more) |
— | almost 3 years ago |
| Question | — |
Help with differential to single ended voltage converter Hello I don't understand how this differential to single-ended voltage converter can work. What I don't understand is why we place a current mirror(a current mirror copies the current flowing through one transistor to another transistor) and how is the output voltage affected by the input volt... (more) |
— | almost 3 years ago |
| Question | — |
Unexpected phase shift in results I find the current flowing through the capacitor $$\begin{align} I{C1}(t)&=\dfrac{\mathrm{d}}{\mathrm{d}t}\left[V1(t)-I{C1}(t)R1\right] \\\\ {}&= \dfrac{\mathrm{d}}{\mathrm{d}t}\left[\sin(t)-I{C1}(t)\right] \end{align}$$ and by solving this differential equation we get $$I{C1}(t) = \dfrac... (more) |
— | almost 3 years ago |
| Question | — |
Current and voltage in AC circuits without impedance How can we find the equation of current and voltage of a capacitor circuit if the input voltage is AC without using the impedance formula Xc = -jωC?. SeeMe We have for homework to find the equation of current of the circuit and the equation of voltage of the capacitor assuming we just connected... (more) |
— | almost 3 years ago |
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