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This resistor is used to startup the osillation. Typically it can provide an appropriate operation point for later Gm stage. Maybe you should provide some detail information.
a better performance it can achieve.
The question is how to analize it? Can ring oscillator be modeled as a negtive resistor in the analysis? How to do an accurate simultion?
Some note: 1.a large cap of about 200pf was added from vo to ground to compensate the loop. There is also about 30pf at...
It seems that ring oscillator should be modeled as a
negtive resistor. However, how to do ac simulation
which can indicate its performance realistically?
**broken link removed**
I add ultra large resistor between vo and bias and ultra large cap between
bias and ac input. Simulation results shows only a phase margin of 14 degree
was achieved. However a stable loop was found in transient simulation even
though a current spike was added.
I can't...
A temperature sensor with about 8 bits resolution digital outputs is needed.
A circuit as simple as possible is appreciated. For example,chopper amp
may be avoided in a PTAT bias generator if necessary.
Thanks a lot!
The value of cdtot,cgtot,cbtot,cstot,cgs and cgd can be reported when
doing operational point analysis using HSPICE. How do they be caculated?
what is the relationship between them and how to combine these values in
my node cap approximation?
Thanks a lot
Testing ADC
a better approach to test adc avoiding intergrating dac in the chip is to analysing the data from logic analyser directly. u can search a free program based on MATLAB in website,such as www.maxim.com.
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