how to measure and simulate negative resistance of a osc

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davidwong

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how to measure negative resistance of a crystal oscillator.
how to simulate negative resistance of a oscillator by Hspice
 

try to give some voltage stimuli and measure current or other way around.
 

i think the mean of negative resistane is to have a device have the phase diffrence between the input voltage and current equal 180 degree so try to make a time domain analysis to watch this fenomena and to calculate the current then u will find the value of negative resistance
i wish it helps i did not test it befor
 

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