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Posts by MissMulan‭

69 posts
80%
+6 −0
Meta How can we grow this community?

When you search on Google about a specific electronics/electrical engineering question, EE Codidact is not in the first few results so I think users should try to upload relevant content freque...

posted 2y ago by MissMulan‭  ·  edited 21d ago by meta user‭

Answer
75%
+4 −0
Q&A 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 tran...

1 answer  ·  posted 3y ago by MissMulan‭  ·  last activity 9mo ago by Lorenzo Donati‭

71%
+3 −0
Q&A 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 s...

2 answers  ·  posted 2y ago by MissMulan‭  ·  edited 8mo ago by Lorenzo Donati‭

66%
+2 −0
Q&A Diode like a frequency mixer

Based on this paper on Wiki a diode can be described as a frequency mixer due to the exponential relationship between current and voltage.What I don't get from which point to which point do we meas...

1 answer  ·  posted 2y ago by MissMulan‭  ·  edited 8mo ago by Lorenzo Donati‭

66%
+2 −0
Q&A Circuit which create ac sine wave from dc pulsed signal

A full wave rectifier converts a sine wave to DC pulsed signal of double frequency. Is there a circuit which does the reverse process?

2 answers  ·  posted 1y ago by MissMulan‭  ·  edited 8mo ago by Lorenzo Donati‭

Question AC DC
66%
+2 −0
Q&A Resistance of digital ampmeter

Can we find the internal resistance of a multimeter ,when we use the multimeter like a ampmeter, from its datasheet? I am trying to find the internal resistance of IDM 505 and I went to the datash...

2 answers  ·  posted 2y ago by MissMulan‭  ·  edited 2y ago by Canina‭

66%
+2 −0
Q&A Select resistor for a diode

Suppose we have this circuit How do I pick a appropriate value for the resistor R1?

3 answers  ·  posted 2y ago by MissMulan‭  ·  edited 8mo ago by Lorenzo Donati‭

Question LED-driver
66%
+2 −0
Q&A $Q$ and $\overline{Q}$ in bistable multivibrator

In this bistable multivibrator which is $Q$ and which is $\overline{Q}$?

1 answer  ·  posted 2y ago by MissMulan‭  ·  last activity 2y ago by Olin Lathrop‭

66%
+2 −0
Q&A 3+3 doesn’t show 6

The correct 1 bit full adder is this:

posted 2y ago by MissMulan‭

Answer
66%
+2 −0
Q&A 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?

2 answers  ·  posted 2y ago by MissMulan‭  ·  edited 8mo ago by Lorenzo Donati‭

66%
+2 −0
Q&A 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...

1 answer  ·  posted 3y ago by MissMulan‭  ·  edited 2y ago by Peter Mortensen‭

62%
+3 −1
Q&A 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 thr...

3 answers  ·  posted 3y ago by MissMulan‭  ·  last activity 2y ago by Circuit fantasist‭

60%
+1 −0
Q&A 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 >...

2 answers  ·  posted 2y ago by MissMulan‭  ·  edited 8mo ago by Lorenzo Donati‭

60%
+1 −0
Q&A 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 ...

2 answers  ·  posted 2y ago by MissMulan‭  ·  edited 8mo ago by Lorenzo Donati‭

60%
+1 −0
Q&A Unexpected phase shift in results

I find the current flowing through the capacitor $$\begin{align} I_{C_1}(t)&=\dfrac{\mathrm{d}}{\mathrm{d}t}\left[V_1(t)-I_{C_1}(t)R_1\right] \\ {}&= \dfrac{\mathrm{d}}{\mathrm{d}t}\left...

2 answers  ·  posted 3y ago by MissMulan‭  ·  last activity 3y ago by coquelicot‭

Question voltage current AC
60%
+1 −0
Q&A Current and voltage of inductor

After the switch is closed : The general formula for finding the current through the inductor is this: where If is the current through the inductor after infinite time,Io is the current of th...

posted 2y ago by MissMulan‭  ·  edited 2y ago by MissMulan‭

Answer
60%
+1 −0
Q&A Voltage and Current of capacitor

How do I find the voltage of the capacitor and the current through the capacitor after the switch is closed?

1 answer  ·  posted 2y ago by MissMulan‭  ·  last activity 2y ago by MissMulan‭

60%
+1 −0
Q&A Confusion with Wikipedia article on multivibrator circuit [closed]

A while ago I made a question about the monostable multivibrator .Lets get a picture of it: When switch is closed it enters its unstable state and it eventually returns to the stable state Howe...

0 answers  ·  posted 2y ago by MissMulan‭  ·  closed 2y ago by Olin Lathrop‭

60%
+1 −0
Q&A 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 ...

1 answer  ·  posted 2y ago by MissMulan‭  ·  last activity 2y ago by Andy aka‭

Question voltage AC DC
60%
+1 −0
Q&A Asynchronous connection question

Assume we have a channel and send 7-bit data(0100100) asynchronously with 1 parity bit(0).Suppose the start bit is 1.The end bits are in the same logic level with the idle state of the channel(0).H...

2 answers  ·  posted 2y ago by MissMulan‭  ·  edited 8mo ago by Lorenzo Donati‭

60%
+1 −0
Q&A Cutoff frequency of single phase transmission line

Signals with frequency above the cutoff frequency of a transmission line cannot be transmitted through the transmission line. But how can I calculate the cutoff frequency of a single phase transm...

0 answers  ·  posted 2y ago by MissMulan‭  ·  reopened 2y ago by Olin Lathrop‭

60%
+1 −0
Q&A Results of analysis of Hartley oscillator dont make sense

I want to find the conditions of oscillation of the following Hartley oscillator.I have attached a load (ZL) to my Hartley oscillator I have written KCL for nodes A,B: For node A: $$\frac{V_{A...

3 answers  ·  posted 1y ago by MissMulan‭  ·  last activity 1y ago by TonyStewart‭

57%
+2 −1
Q&A 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 ha...

1 answer  ·  posted 2y ago by MissMulan‭  ·  edited 8mo ago by Lorenzo Donati‭

57%
+2 −1
Q&A Choosing Y value in photoresistor graph

I have designed a graph of the current in a photoresistor related to the brightness of light which hits the photoresistor. Our professor told us that it is more correct to draw the Current/Brigh...

1 answer  ·  posted 2y ago by MissMulan‭  ·  last activity 2y ago by Olin Lathrop‭

50%
+0 −0
Q&A Capacitors of voltage regulators [closed]

Assuming we have a voltage regulator : Why do we have to ground Vin and Vout using 2 capacitors just like that?Co could be to provide a low resistance path to GND at high frequencies but what is...

0 answers  ·  posted 2y ago by MissMulan‭  ·  closed 2y ago by Olin Lathrop‭