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# Posts tagged voltage

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32 posts
85%
+10 −0

Usual values used in doing electronics/power supplies are almost always round numbers: 5V 12V 28V 48V 60V I understand that in some cases ICs are built to accept the voltage directly comi...

4 answers  ·  posted 2y ago by 2kind‭  ·  last activity 1mo ago by TonyStewart‭

Question voltage
25%
+0 −4

Instead of using a buck or a boost converter can we use for DC-DC conversion the circuit Im going to describe in the next lines? First we begin with a Hartley oscillator whose output is fed into ...

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

Question voltage
71%
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I was looking for guidelines of how to select appropriate cables for applications (I am interested in DC), I found IEC 183 standard which talks about high voltage cable selection for AC. Also, the ...

1 answer  ·  posted 3mo ago by Elleanor Lopez‭  ·  last activity 2mo ago by Sclrx‭

Question voltage
33%
+0 −2

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} \cd... 1 answer · posted 2y ago by MissMulan‭ · edited 2mo ago by Lorenzo Donati‭ Question voltage 75% +4 −0 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 2y ago by MissMulan‭ · last activity 2mo ago by Lorenzo Donati‭ Question voltage 60% +1 −0 During the open circuit test of a induction motor ,not any current flows inside the rotor.But how can we achieve such a thing? Here is the ping configuration of a induction motor: The coils of ... 3 answers · posted 4mo ago by Volpina‭ · last activity 4mo ago by rdtsc‭ Question voltage 50% +1 −1 This picture describes the behaviour of a single phase transform under resistive,inductive and capacitive loads(from left to right) How what exactly is V_{1} ?Is it the voltage at the primary ... 1 answer · posted 4mo ago by Volpina‭ · last activity 4mo ago by TonyStewart‭ Question voltage 60% +1 −0 We use a DC externally excited generator/motor as a generator.We excite the input of the generator and get at the output 10V at 1Wb flux and at 5rps generator speed without connecting the generator... 1 answer · posted 5mo ago by Volpina‭ · last activity 5mo ago by Olin Lathrop‭ Question voltage 75% +4 −0 I've heard that arc welding is getting done with low voltage. I believe arcing requires high voltage. Then how is arc welding done with about 50 volts? I thought we need kilovolts for arcing. Why? ... 3 answers · posted 9mo ago by mohammadsdtmnd‭ · last activity 6mo ago by TonyStewart‭ Question voltage 28% +0 −3 Im designing a high-pass filter which has a gain of -8dB at half of the roll-off frequency and I am stuck ,I dont know how to continue the design. In the bode plot of that filter we have 2 points:... 3 answers · posted 1y ago by MissMulan‭ · last activity 1y ago by LvW‭ Question voltage 60% +1 −0 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

Question voltage
33%
+0 −2

Im designing a Hartley oscillator this time with a opamp providing the open-loop gain.I have tried drawing the small-signal analysis of my circuit to use KVL and KCL to find the conditions of opera...

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

Question voltage
33%
+0 −2

The small signal analysis of a BJT when the BJT is in amplification mode: is easy.However what happens when the BJT is in saturation mode? Can we replace the dependent current source with a r...

1 answer  ·  posted 1y ago by MissMulan‭  ·  edited 1y ago by MissMulan‭

Question voltage
50%
+0 −0

I am trying to find the AC analysis of a BJT Hartley oscillator but I cannot continue. How do I find the voltage gain? When no feedback is there, we just find the output resistance and the current...

1 answer  ·  posted 1y ago by MissMulan‭  ·  edited 1y ago by MissMulan‭

Question voltage
33%
+0 −2

I am designing a low-pass filter with cut-off frequency = 100Hz and after the cutoff frequency from -3dB to -10dB the average decrease in db/Hz = -0.1 db/Hz.I know how to design a low-pass filter ...

2 answers  ·  posted 1y ago by MissMulan‭  ·  edited 1y ago by MissMulan‭

Question voltage
33%
+0 −2

I was studying the Re model of a transistor: But the Re model for 2 different configurations (common emitter and common base )turns out to be the same! I don't know why I am really confused.How...

2 answers  ·  posted 1y ago by MissMulan‭  ·  last activity 1y ago by LvW‭

Question voltage
50%
+0 −0

In this datasheet it says that the minimum resolution is 0.1uA for the 10mA range.What is this minimum resolution?Is it the sensitivity of the multimeter for the 10mA range?

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

Question voltage
66%
+2 −0

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

Question voltage
60%
+1 −0

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

Question voltage
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+0 −0

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

Question voltage
28%
+0 −3

I have this circuit: I think that R3 acts like a feedback path from the output to the input.However I am not sure what will happen if I change the value from 100Ohms to lets say 1kOhms. I have ...

2 answers  ·  posted 2y ago by MissMulan‭  ·  last activity 2y ago by LvW‭

Question voltage
62%
+3 −1

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 2y ago by MissMulan‭  ·  last activity 2y ago by Circuit fantasist‭

Question voltage
50%
+1 −1

In monostable multivibrators we use a trigger signal applied to the base of the transistor which is usually off to enter the astable region Can we instead have a pin which is connected directly ...

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

Question voltage
66%
+2 −0

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 2y ago by MissMulan‭  ·  edited 2y ago by Peter Mortensen‭

Question voltage
28%
+0 −3

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

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

Question voltage
60%
+1 −0

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

Question voltage
66%
+2 −0

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

Question voltage
25%
+0 −4

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 ori...

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

Question voltage
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+0 −0

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 th...

0 answers  ·  posted 2y ago by MissMulan‭

Question voltage
60%
+1 −0

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
60%
+1 −0

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 2y ago by MissMulan‭  ·  last activity 2y ago by coquelicot‭

Question voltage
50%
+1 −1

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?. We have for homework to find the equation of...

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

Question voltage