In seebeck effect:
Once the red region is hot, the electrons and holes move toward cooler region i.e. bottom. So there is a positive potential toward right side of cold side and negative region toward left side of cold side. So why can't the electrons and holes combine here only...
Could you explain the working of this circuit?
I found a slightly difference circuit:
In transmitter section, the Transistor is generating high-frequency AC current across the coil and the coil is generating a magnetic field around it. As the coil is center tapped, the two sides...
Ref: https://www.semanticscholar.org/paper/Design-and-Simulation-of-Different-Wireless-Power-Baroi-Isla m/dc19ecfde904964704777ab5adef96d5d6846f1f
I couldn't find the working of this circuit so I guess it would be like:
Initially transistor is OFF, so the current flows through Base, and...
Thanks for all the replies. It's very helpful. Sorry for the late reply. I had gone home for holiday.
This is where I have doubt. If the difference between input and output phase is zero then the output of LPF will be zero and thus the VCO will get 0 signal in that case?
Or maybe the final...
I'm just having a hard time to understand why convert phase difference to frequency output. I mean in feedback the goal is to reduce output error.
Like you run a system, and the feedback will give part of output to the input. This will be error and the final goal is to reduce error by using...
So once the output frequency matches the input frequency, will the phase detector give any output signal or will it give zero?
Let's assume at some point difference between input phase and feedback phase is 30 degrees. So VCO will get a DC signal that is proportional to 30 degrees. So VCO will...
It says that the PD produces an output that is DC level proportional to (Fi - Fo) (I think it has typo. It should be '-' but they've printed '+').
Then the low pass filter removes the high...
Thanks a lot. Very helpful!!!
One last question (a bit silly maybe). Why would the flux collapse? I mean in case of a capacitor once we charge it, then unless there is a closed path (preferably with a R in series) the capacitor won't discharge (assuming leakage to be 0)
But in circuit that we...
When you say Q1 open, you mean it's short circuit right? How do you figure out dot convention for transformer?
There was this another circuit on this link:
Are you talking about Q1 or Q2?
Suppose Q1 is initially on, so current path is
Then flux across N1 will saturate and reach a constant value. So emf across it will reduce and become 0. Then what will happen? It's inductor so eventually it'll be short circuit for DC current.
Why will current...
I am studying Wireless Energy Transfer and I find Royer Oscillator in that.
I am unable to understand how it works.
I found a diagram here:
It says that (quoted from webstie):
Our professor is teaching this circuit and she mentioned there are 24 transistors. But I counted and it comes out to be 22
T1 to T4 needs 2 (transistor) * 4 = 8 transistors
Each inverter needs 2 transistors. so 7 inverters need 14 transistors.
total 22 transistors.
Unless we're also creating a...
Why does the band diagram shift up or down when I apply potential? Why does it shift down when positive potential is applied? Professor said it's because electron has negative charge and so we consider...
Also maybe it can be that inverter also makes up for voltage drop if any. Like inverter will again either pull up to 5 V or 0 V. Like if memory has output as 5 V, then with time it may degrade to 4.5 V and then to 3 V. If it goes below 2.5 V, it may be treated as logic 0.
So with 2 inverters...
My book has this diagram:
Book: Digital Integrated Circuits by Jan M. Rabaey
I don't understand the purpose of using the three Inverters. It's not mentioned in the book, nor could I find anything on the internet.
Thanks. I understood the 1 part. But not the second part. How will drop across M2 be zero. Drop across M2 is overdrive voltage, right? I.e Vds.
Vx can be Vdd - Vth. If Vy also becomes Vdd-Vth, then there will be no current flow as Vds = 0. No potential difference so no current flow.