Questions tagged [oscillator]
A device or circuit that generates an AC signal at a certain frequency.
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How do the capacitor & resistor actually introduce a delay in the following oscillating circuit in terms of electron flow?
simulate this circuit – Schematic created using CircuitLab
How, in terms of electrons, do the capacitor and resistor actually create the delay and still permit the oscillation given that ...
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555 Circuit for Spark Gap Lighter Not Functioning Correctly
I have a circuit designed and fabricated with the following schematic:
The specific 555 timer I'm using is a NE555DR.
However, when under power the circuit doesn't appear to oscillate and no spark ...
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Importance of load capacitance in 32.765 kHz crystals
I am designing a very low power portable device that has an RTC and I cannot choose a crystal for it. Most crystals on the market have 12.5pF load capacitance, however there are also 6 or 4pF crystals ...
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How should I test an oscillator on a PCB?
How does one go about testing an oscillator that is designed on a PCB? I have worked with breadboards before, but never a PCB.
On breadboards, I usually test a lead connected to an output. On a PCB ...
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LTspice: triangle wave circuit not producing any waveform
I've implemented this circuit in LTspice from this Triangle Wave Generator tutorial.
Unfortunately, when I run the simulation, it doesn't produce a wave at all, just a flat VDC output. Any help would ...
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Converting a standard oscillator to a low-power square wave oscillator [closed]
I'm working on a project using a backscatter tag for soil sensing that is using an 5-18 GHz antenna, and a low power oscillator operating at 5-18 GHz toggling an RF switch.
The oscillator option has ...
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For this particular Ring oscillator topology, will the circuit prefer to latch up or oscillate?
This circuit is chosen from Razavi's textbook Design of CMOS Phase-Locked loops
In this circuit, where the outer inverters are weaker than the inner ones, does the circuit prefer to latch up or ...
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How to connect oscillator to MCU for power saving operation
I have to connect an oscillator (RTV-104EF13P-S-10.000-TR) to an MCU (STM32G051F8P6) in order to have a more precise clock.
The datasheet provides very little information about the ...
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What are the necessary conditions to prevent latch-up problem for Oscillators?
In his chapter on oscillator design, Razavi discusses the issue of latch-up and proposes several methods to eliminate it. However, he doesn't provide explanations for these methods. Could anyone ...
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If many radio waves can generate currents in the antenna ground circuit **simultaneously** I am wondering do they all get carried over to the tuner?
If many radio waves can generate currents in the antenna ground circuit simultaneously, I am wondering do they all get carried over to the tuner circuit?, but only the current whose frequency matches ...
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How do I achieve the desired frequency with a Colpitts oscillator?
I would like to build an oscillator with frequency variation from 50MHz to 100MHz.
I decided to use a Colpitts oscillator because I read that it is stable and easy to build.
I built the circuit as ...
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Problem with LR oscillator
I am trying to make a self oscillating fluxgate transformer using an LR oscillator with an op-amp. I replaced the op amp with a square wave generator and the h bridge worked fine but when using op amp ...
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Inverter Oscillator Ground Return
I have a PCB design for a guitar pedal with a DSP chip processing some audio signals that would normally run off a 32768 Hz crystal, but part of the guitar effect allows the user to change the clock ...
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Sine oscillator at extremely high frequencies
I would like to make a "good" (doesn't need to be perfect) sine wave oscillator from 50 GHz to 1 THz, if possible with two outputs: one is \$\sin(2 \pi f t)\$, the other one would be \$\cos(...
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LM318 strange oscillations
I want to make a 100~200 kHz square wave signal. I tried with a Schmitt trigger oscillator . The circuit below worked well with another op amp but the slew rate was too low so a tried with the LM318 ...
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Do we need to provide same voltage for microcontroller I/O and oscillator?
I am using a PIC32CZ8110CA90208-I8MX-SL3 in my design. I am providing a supply of 1.8 V to VDDIO.
The oscillator used is a DSC6011JI2B-012.0000.
Can I supply 3.3 V to oscillator VDD and 1.8 V to ...
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Equivalent impedance for R-C configuration in op-amp input
If I have a circuit like this, how can I obtain the loop gain, since the capacitors and resistors are not either in series or parallel? If the feedback resistance is \$R_f\$, then I have something ...
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Simplest practically buildable oscillator
What could be simplest practically buildable oscillator circuit?
The meaning of "practically buildable" here is that it can be built without handpicked parts. For example, a reverse ...
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Modified astable multivibrator with sharp edges
I am designing an astable multivibrator that would avoid rounded output edges and also has a totem pole output, so it is able to drive a small charge pump.
So I decided to replace a collector ...
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3
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What happens to output of a crystal oscillator if the input it's given is an AC waveform instead of stable DC?
Some things I've read say the crystal acts as a filter and you still get its resonant frequency as the output and something else I read says feeding the crystal oscillator with a sine wave of the ...
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How is a resonant bandpass filter similar/different from a damped mass-spring oscillator? They seem to behave different in testing
Background
I am using resonant bandpass filters as musical oscillators. One can excite an array of them at harmonic frequencies and given Q values for a note by, for example, running a burst of noise ...
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433 MHz crystal 3 feet pinout?
What are the pins A, B, C of this 433 MHz crystal oscillator?
https://nexelectronics.in/wp-content/uploads/2023/01/433-MHZ-CRYSTAL-OSCILLATOR-1.jpg
I suppose these are input, output, ground. Could ...
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Sawtooth peak detector
I am trying to create a circuit for converting a variable frequency clock signal (with unknown duty cycle) to a pulse wave with an adjustable frequency-independent duty cycle. My approach is to create ...
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How can I drive an LC tank with a transistor?
I've been exploring the idea of making an induction heater.
Mostly I see people using the ZVS circuit to do it, but I would like to get an understanding as to how you would do it if you had an ADC and ...
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Why does voltage spike when resonance frequency is matched with crystal oscillator?
I am learning to test the accuracy of specific frequencies of crystal oscillators using a function generator and oscilloscope. When you get closer the the actual frequency of the crystal the voltage ...
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2
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555 timer producing 3x expected frequency in astable mode [closed]
I’ve just started experimenting with electronics, and for my first project I made an oscillator with a 555 in astable mode. I used two 56k resistors and a 0.1 uF capacitor for the C1. I also included ...
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How does this type E oscillator work?
I recently watched this video (link below) that showed me a simplified circuit diagram for a "type E oscillator". I tried researching this, but I couldn't find much information on this.
...
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How does a capacitor in an astable multivibrator turn off a BJT?
I've recently started learning about astable multivibrators. I understand that the capacitors in a circuit like the one below create the alternating current by charging up one at a time, and once they ...
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Simple Collpits oscillator not working
I'm trying to make a Collpits oscillator. I've made a design that fits my resources and works in a simulation but does not work when assembled. I've checked every element and have no idea what to do ...
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Why is the inverting gain of this phase shift oscillator 8?
In this oscillator configuration, which I got from the textbook "Operational Amplifiers & Linear Integrated Circuits" by James Fiore (page 354, 3rd edition), since the gain of the ladder ...
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Variable frequency sine generator
What is an simple option to generate a low freq. sine in range 10Hz to 200Hz? I tried to make a triangle and integrate it but I obtained a huge difference in amplitude as I change the triangle ...
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How do I derive the frequency of an LFO circuit?
I'm attempting to solve why the frequency of an LFO, which is a Schmitt Trigger - Integrator LFO, seems to be about 7.13 Hz even when the reverse logarithmic potentiometer is set to its lowest setting....
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Oscillator's frequency way off LC prediction
I tried to make the simple Robinson oscillator given in the pictures below using cross-coupled NPN transitors attached to an LC tank circuit. The part that I have used is M2N4401.
The issues I find ...
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MOSFET ring oscillator LT SPICE
I am designing a ring oscillator using MOSFETS to create the inverters however, I am encountering problems with the output. Please check my understanding. Here is what I understand: the oscillating ...
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How can I get a differential output as an input for another circuit on ADS?
I'm currently making a project on ADS for a differential pair oscilator:
The desired output for this circuit is Vout2-Vout1.Now, I want to plug a buffer on this circuit, but I don't know how to ...
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BJT ring oscillator
I would like to build a ring oscillator with a BJT but the waveforms do not look correct. currently, I am using the following circuit:
My question is how do I control the frequency while at the same ...
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Astable Multivibrator Not Oscillating
I've been trying to get the Astable Multivibrator Circuit to work for a long time now, and I think I lack the knowledge to understand what's going on here.
The situation is as follows: I've checked ...
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How many LC oscillators can you easily fit on a single chip?
I recently read this interesting blog post about 'thermodynamic computing' that tickled my fancy.
The TLDR version is that the authors designed and built a circuit that can perform matrix inversion ...
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How to generate a sine wave that is in phase with a generated square wave at 1MHz for lock-in amplifier?
I am building a lock in amplifier (LIA) for fluorescence lifetime measurement using off the shelf components, after going through literature, I have decided to use square wave for excitation of the ...
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How can I attenuate noise from synchronous divider and OCXO?
I am experimenting with a square OCXO, dividing its output frequency to 1kHz using a 4017 synchronous counter and feeding the output to a sound card using Spectrum Lab software. I can then record it ...
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Power supply coupling of inductive resonant sensors
I'm working on an array of sensors based on Peltz Oscillators connected to a micro to detect objects based on shifts in resonant frequency when a target object gets close to the inductor. In isolation,...
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What exactly is a "silicon oscillator"?
LT and Maxim (both now part of Analog Devices) have product lines of what they call "silicon oscillators", which are for the most part tunable oscillators with a very wide tuning range, but ...
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Why not put a crystal oscillator inside the microcontroller?
Why not put the crystal oscillator inside the MCU itself, rather than using an RC internal oscillator? I could think of the following possibilities but not sure if they are valid:
MCU manufacturer ...
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Unable to get my astable multi-vibrator working in LTspice
I'm trying to build a basic square wave oscillator using an astable vibrator made with an op-amp for my Intro to Circuits class.
Unfortunately, I cannot get LTspice to simulate the oscillations.
I've ...
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I am repairing an automotive board. I want to know about the manufacturer of a crystal oscillator
I want a datasheet for the below attached image crystal oscillator. It will be helpful if someone find it. I want to use same manufacturer crystal.
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How does this oscillator circuit work? Inductor phase
I simulated in it LTspice software. The voltage waveform across capacitor C4 was sinusoidal. I know its some kind of oscillator but don't know how it's operating?
I think the reason behind center ...
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Why are the second and the sixth pin of 555 timer named as they are?
Why is pin 2 of the 555 timer named trigger?
Why is pin 6 of the 555 timer named threshold?
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Why is my crystal oscillator (4 pin DIP 4 MHz unbranded from ebay) producing unusable clock signal waves?
I posted this on retrocomputing but they told me it would be better for me to post it here.
I was trying to make a Z80 computer. I tried with Intel 8088 and failed because I am inexperienced, so I ...
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High voltage DC to AC oscillator circuit [closed]
I am trying to design a oscillator circuit that will convert ~10 kV DC at 60 hz to ~9-10 kV AC at 60 hz, and all the information I'm seeing is circuits that step up voltage. I wonder if making this ...
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What is a slow clock oscillator embedded microprocessor (MPU)
I am using SAMA5D27C-D1G-CU in my design. In the signal description I can see that it has two oscillators.
Main oscillator and slow clock oscillator. Please see the image below.
I have couple of ...