Questions tagged [tank]

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LC circuit with back to back diodes [closed]

I know how an LC circuit works, but in this circuit there are 2 diodes and I am not able to intuitively get the waveforms of current and voltage across the capacitor. Could you please help understand ...
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1 answer
51 views

How is energy conserved in an LC tank with voltage offset?

Consider an ideal LC tank oscillator offset by an ideal battery*: The core question is this: is the energy balance here maintained by the charge-voltage relationship of the battery? Energy seems to ...
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Impedance matching source with tank circuit

Is it necessary to impedance match the source (pulsed DC) with the capacitor in a parallel LC tank circuit in order to successfully charge the capacitor and achieve resonance in the tank circuit?
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-1 votes
1 answer
100 views

How do these LC circuits work?

The Very Short Version A.K.A tl;dr; A transistor is needed to make tank circuits continually run. How does the transistor make tank circuit do this? Is it adding to the electric field of the capacitor ...
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1 answer
123 views

What LC tank circuit is needed for a 318 MHz remote control 9 DIP switch for a garage door controller transmitter opener using the PT2262 IC?

I want to use the PT2262 remote control encoder to create a garage door remote. This is just for fun. (I realize I can get a universal controller 318 MHz 9-DIP switch remote for about $16.) I was ...
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1 answer
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Can someone help me make this circuit work?

I am trying to implement the circuit described in this paper in LTspice. The circuit is shown below: The paper claims that the circuit can be used to measure the resonant frequency of the coupled LC ...
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1 answer
201 views

What dimensions would L1 in this 433MHz tank circuit receiver be if it is actually 1.5 turns?

Specifically, this circuit from Elektor: The asterisk denotes that L1 in this 433MHz receiver circuit would be 1.5 turns. If that is accurate, what would the dimensions of the inductor air core be? ...
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1 answer
75 views

Q factor in RLC circuit

According to Wikipedia the definition of the Q factor it is the ratio of energy stored/energy dissipated per cycle*2π If we have an underdamped oscillation of a RLC circuit does this mean for every ...
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1 answer
61 views

LC circuit voltage

Suppose we have this LC circuit and assuming the capacitor is precharged with its voltage pointing to the left(left plate has an excess of negative charges and right plate has an excess of positive ...
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-1 votes
1 answer
99 views

LC tank circuit behavior

Today in our lesson we did the LC tank circuit and its natural response frequency.I get how the equations work but what I didn't get is a qualitative explanation of what's going on.I mean why does the ...
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1 vote
1 answer
73 views

A question regarding the resonant circuits

I am at the beginning of trying to understand resonant circuits, so after doing some research about the basic of resonant circuits , I noticed that there are diagrams appearing the basic working of a ...
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1 vote
0 answers
71 views

EC and pH sensor in plc automation

I am working with automation using pH and EC sensors. Both are of 4-20mA communication standard. When at a time single sensor is placed in liquid(in 1000 litre tank) then everything works fine (...
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1 answer
124 views

What is the explanation of non-zero VCE voltage of an IGBT while its gate is high?

While investigating a malfunctioning high power induction heater system (which constantly destroys its IGBT modules), I came across an interesting situation. Circuit Gate drivers are SKYPER 32 PRO R ...
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1 answer
40 views

LC tank connected to t flip flop

A t flip flop needs a clock signal to operate correctly. That clock signal will be provided by a LC tank circuit. Can I just connect the CLK pin to one of the nodes of the LC circuit or is it more ...
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1 answer
127 views

Colpitts Oscillator

I am implementing the following oscillator circuitry on my breadboard: I am using the LM324n op amp and a solderless breadboard. The oscillator is tuned at about 500KHz resonant frequency, but when I ...
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2 votes
5 answers
615 views

Create electromagnetic waves using Lc tank circuit

Electromagnetic waves are produced by the motion of a dipole and suppose we have top and bottom points then the negative and positive charges must oscillate between those 2 points. However an LC ...
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2 answers
116 views

Colpitts Oscillator Issue

how are you all doing? I have been experimenting with the Colpitts Oscillator and encountered a minor issue that I would like to resolve. Here are the two circuits - the first one is working ...
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2 votes
0 answers
25 views

Ho can I light number of LEDs based on current flowing through circuit [closed]

I am trying to create a water tank level indicator which will have 2 wires going into tank one with resistors attached at increment levels and one simple wire. Is it possible to light up number of ...
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1 vote
0 answers
82 views

Is this an elegant approach for a simple, debounced tank level controller?

I am interfacing some industrial (24v) process control equipment to some new projects in the embedded realm of electronics (3.3/5V small signal) and am coming up with some simple solutions for ...
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4 answers
880 views

What is the difference between a tank circuit in an oscillator and a resonance circuit?

I understand that if a charged capacitor is placed with an inductor (and then remove the power supply,) the capacitor and inductor will exchange energy back and forth, it will basically oscillate and ...
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1 vote
2 answers
448 views

In a points ignition system, should the condenser(capacitor) be attached to the coil terminal or to the breaker points

Is there any difference in the function of the circuit if the capacitor has a shorter wire path to the coil or to the points?
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1 answer
1k views

LC ringing on synchronous buck converter

I am working on a board that uses LTC3891 as a buck converter to step down 24V to 12V. There is quite a significant oscillation at the switching node, upstream to the inductor which I am curious about....
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  • 347
3 votes
2 answers
157 views

DIY water tank gauge using analogue ammeter

Our (old) boat has a fresh water tank whose level was reported by a now broken gauge. For cosmetic reasons I need to replace the broken gauge with a similar form factor (I do not wish to cut the panel ...
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0 votes
1 answer
115 views

Series or parallel tank circuit?

The secondary of a transformer with a cap connected across it - should it be considered as a parallel tank circuit or a series one? It looks like parallel, but in reality the voltage rises on it when ...
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0 votes
2 answers
175 views

two tanks control problem [closed]

I have been trying to solve this problem for months now. I work as an Electrical Engineer in a tunnel project, we will use TBM machine to drill the underground station. We have two tanks in TBM for ...
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0 votes
3 answers
114 views

Why is there a constant -1A current through the voltage source at resonance?

Below circuit is at resonance. Shouldn't the circuit offer infinite impedance to the voltage source ? I thought, then the current through the source would be 0A. But the simulation shows that the ...
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1 vote
1 answer
124 views

Close Oscillators Problem

I have 3 "Emitter-Coupled" Oscillator, the difference is that I don't use a resistor on the tank circuit and I do vary the Inductor inductance. They're close on the PCB and they got some disturbs, if ...
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0 votes
1 answer
376 views

Equivalent R for Bandwidth of non-ideal parallel RLC circuit

I'm tasked with calculating the bandwidth of a tank circuit shown below. I can see that it is essentially a parallel RLC, for which I know BW=1/RC However that ...
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0 votes
1 answer
2k views

Mosfet Switched capacitor in LC tank

I need to coarse control the frequency of oscillation on a parallel resonant tank. The frequency band is in the 500kHz-1Mhz range, so the small capacitance of varactors doesn't suit the task. ...
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-4 votes
1 answer
586 views

20 Mhz AM transmitter and receiver - Receiver does not receive [closed]

I am doing a circuit for an AM transmitter and receiver. I extracted it from http://www.pyroelectro.com/projects/pyro_rf_receiver_27mhz/index.html. Receiver: I have already done the transmitter, ...
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1 vote
2 answers
1k views

Induction heater design - Current transformer windings ratio

I am currently building an induction heater and would like to verify my approach to this as I'm uncertain if it is correct. Below is the topology of the resonant tank circuit I have constructed. The ...
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0 votes
1 answer
164 views

Lowest Q factor than expected for a LRC paralel circuit

I tried to improve the Q factor for a tank in a LRC parallel circuit by a factor of 30. To do that I used an inductance that is 30 times smaller. To keep the same resonant frequency, I replaced the ...
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0 votes
1 answer
1k views

Why in a voltage driven parallel RLC circuit (at resonance), the current of the inductor has a DC component?

I'm refreshing my knowledge on LC/RLC circuits, and an interesting thing came up that puzzled me. I'm doing simulation on parallel a RLC circuit (in LTSpice), which is driven with a sine voltage ...
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1 answer
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LC tank Q factor

I am working on parallel LC tank. It is Rp // Lp // C . Rp = Rs( 1 + Q^2 ) Since inductor dominates capacitor under high frequency, Rs is parasitic resistance of inductor. It seems to me Q factor ...
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5 votes
2 answers
2k views

How does this oscillator work under a constant DC voltage?

Consider: How does the oscillator in this circuit work? A tank circuit can't oscillate when there is a constant DC voltage, am I wrong? I simulated the circuit in NI Multisim and couldn't observe any ...
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2 votes
2 answers
11k views

How to determine capacitor and inductor values for parallel tank circuit?

There is the formula \$\frac{1}{2 \pi\sqrt{LC}}\$, which can help find the value of the capacitor or the inductor if one of them is known. But if them both unknown and i would like to make a parallel ...
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  • 283
0 votes
2 answers
217 views

How do you block a signal with a tank circuit?

I have a signal generator outputting 60 hz AC. I've connected the output to a capacitor (922uf) and inductor (0.0076H) which are in parallel with each other creating a tank circuit. These two values ...
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0 votes
1 answer
686 views

LC Tank Tuner for Super Regenerative Radio

There seems to be very little literature to explain the practical construction of a radio and how a super regenerative circuit actually act as a selector, amplifier, how a antenna is actually to be ...
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0 votes
4 answers
4k views

AC Circuit + Parallel resonant band-stop filter

My EE book says about this circuit: "The parallel LC components present a high impedance at resonant frequency, thereby blocking the signal from the load at that frequency. Conversely, it passes ...
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1 vote
4 answers
2k views

Why is this LC filter where it is, and what function does it perform?

My customer has a motor controller that apparently only works with an LC filter in front of it. This configuration trips out on undervoltage: simulate this circuit – Schematic created using ...
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0 votes
1 answer
5k views

LC tank circuit feeding on op-amp, no oscillation?

Based on what I learned during this experiment I've built the following circuit using an op-amp configured as a buffer... simulate this circuit – Schematic created using CircuitLab The ...
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0 votes
1 answer
257 views

maximum voltage that a colpit oscillator can withstand

I am working on a wireless power transfer project using, I need to design an oscillator. I need a frequency of over 2MHz and I need it for a high power application. So my question is what is the ...
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2 votes
2 answers
2k views

LC Oscillator, Tank Circuit

How does a tank circuit work with a dc power supply? I understand that if you charge a capacitor that's in parallel with an inductor and then remove the power supply then the capacitor and inductor ...
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3 votes
2 answers
3k views

Can a tank circuit store energy for a simple AC system?

If you take the circuit below, with the switch closed, assuming the Tank circuit is tuned to resonate at the same frequency as the source, then I would expect the tank to become charged, and the ...
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-3 votes
3 answers
479 views

Ideal LC Tank Circuit

It is true that connecting an Inductor (L) and a capacitor (C) in parallel provides oscillation? If so, where do you take the output from? Theoretically it is explained that once we connect L and C ...
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17 votes
3 answers
5k views

What operation could cause the inductor or the capacitor to explode?

In really early days of electronic school, the teacher used to say something about not unplug power too quickly at an inductor or capacitor and we were used to slowly turn the voltage generator from a ...
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2 votes
1 answer
207 views

What is the conductance of this LC tank?

So, I start with total conductance: $$ G_{TK} = \frac{1}{\frac{1}{j\omega C}+ 2R_C} + \frac{1}{j\omega L + R_L} $$ Then, when I take only the real part of this expression in order to know the ...
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2 votes
2 answers
6k views

Theory behind the "Joule Ringer" circuit

The less-than-critical thinking free energy types are pointing to the "Super Joule Ringer" demonstrations online, where a quick touch with a 9 V battery illuminates an LED for hours. http://...
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2 votes
3 answers
4k views

Voltage output from a tank circuit

I have the following tank circuit. Now at resonance of about 50.054 MHz, the output voltage should be same as input, as the tank circuit would have a high resistance. I have calculated the impedance ...
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