# Questions tagged [tank]

The tag has no usage guidance.

50 questions
Filter by
Sorted by
Tagged with
109 views

### Formula for Q of a parallel tank circuit

We have defined the Q as the following: Now I tried to apply that to the parallel tank circuit, I get : $$Q = RC\omega_0 + \frac{R}{\omega L}$$ However in the lecture notes and the textbook the ...
207 views

### 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 ...
61 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 ...
108 views

### 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?
134 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 ...
310 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 ...
234 views

### 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 ...
411 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? ...
200 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 ...
75 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 ...
187 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 ...
1 vote
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 ... 1 vote
135 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 (...
183 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 ...
45 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 ...
212 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 ...
942 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 ...
174 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 ...
26 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 ...
1 vote
88 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 ...
1k 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 ...
1 vote
1k 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?
1 vote
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....
179 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 ...
1 vote
237 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 ...
199 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 ...
130 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 ...
1 vote
132 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 ...
459 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 ...
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. ...
656 views

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, ...
1 vote
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 ...
192 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 ...
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 ...
6k views

### 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 ...
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 ...
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 ...
262 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 ...
757 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 ...
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 ...
1 vote
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 ...
6k 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 ...
300 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 ...
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 ...
4k 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 ...
535 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 ...
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 ...
225 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 ...