Crystal Oscillator Spice

I'm attaching an LTspice file that simulates a crystal oscillator with resonant frequency 1MHz, and it works fine. But if I change L1 from 2.5 H to 9.8 mH to simulate a crystal oscillator with resonant frequency 16MHz, it flat-lines no oscillations. If I replace the CMOS inverter with a custom model for a chip like the 74HCU04, it works.

I am trying to model a 16 MHz crystal controlled oscillator in LTSpice. The attached circuit oscillates but I cannot see the output waveform spread out in the plotted output file. I have modeled a square wave and spread out the waveform from the attached LTSpice Square Wave Circuit Model

Any Idea to do Simulation Crystal Oscillator in LT Spice ? Analog amp Mixed-Signal Design 18 Jun 27, 2020 Similar threads Crystal Pins Orientation Converting a crystal-mixing CB to ten meter FM. Crystal Oscillator Design Problem With Quartz Crystal Simulation

Fast crystal-oscillator-simulation methodo logy The settling behavior of a crystal oscillator typically requires days to simulate with Spice. A new methodology for fast simulation of crystal oscillators allows such simulations to proceed in less than an hou r and brings benefits such as the ability to accurately predict the frequency

This circuit models the crystal with the low impedance series resonance and the high impedance resonance, through parameters Rs, Ls, Cs and Cp. the series frequency resonance is fs 16.28SQRTLsCs, and the parallel frequency resonance is fp fsSQRT1CsCp Project Type Free Complexity Simple Components number lt10 SPICE software LTspice Software version IV Full software

9292begingroup92 Simulating a crystal oscillator is always an issue as the LC tank in a crystal has an extremely high quality factor like 100000 or higher meaning that it is very difficult it takes a lot of time to increase or decrease the energy in the LC tank. That means extremely long simulation times.Personally I use a trick, I decrease the Q of the LC tank by increasing the C value and

Q-Tech QT6xxLW Multiple Output LVDS Series Of Space Qualified Crystal Oscillator. Offers Up To 12 LVDS Differential Pairs In A Single, Space-Saving Package.

Starting up oscillator circuits and getting them to maintain oscillation in a Spice simulation is difficult. Some high-frequency crystal circuits require days for the oscillation to reach steady state. Thus, most designers separate the crystal's circuit simulation from the rest of the system design.

found your note on the LT spice crystal model. I WAS despairing of ever getting output. By setting the transient time to 10 mS I was able to finally see a crystal oscillator start. I was also able to cook and eat dinner while it churned. So, I've got that out of my system.

Three projects of Crystal oscillator examples. Getting a circuit to oscillate under Spice is difficult enough. Getting a Quartz Crystal based oscillator to work under Spice adds to the difficulty. Presented are BJT based designs and ones using 74HCU04 CMOS inverter. Finding a 74HCU04 Spice model that worked was another problem.

Before you can even think of simulating a crystal oscillator and get meaningful results out of it I strongly recommend you to gain experience using non-crystal oscillators first. To simulate an oscillator properly you have to know how to determine if it has enough loopgain. With a crystal oscillator you can very easily be fooled by the high Q