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In typical cmos technology, vertical pnp is utilized as diode, so low beta does not affect bandgap performance.
But I think base res could be a problem to deteriorate the exponential relationship of Ie and Vbe.
PLL is used for clock generation in the digital chip,so a ADC is unnecessary. ADC is widely used as the signal interface between the analog circuit and digital circuit.
PLL BW, jitter etc
It depends on...
There are some parameters which influence the performance you have said.
jitter: if your system's noise mainly from vco, then a larger BW helps to reduce the jitter; the setting of BW is a trade-off with the vco phase noise and the reference noise(divider...
the bootstrapped technique(fig.1) can enhance the gain in the ota application. but the bootstrap introduces a positive feedback loop in the ota. How about its stability?
If the closed loop negative feedback is strong enough to overcome the positive feedback introduced by bootstrap, is the ota...
hi, I have a question about conjugate complex poles in opamp.
Thank you all in advance.
when i adjust the size of miller cap in two-stage opamp, in some regions i get conjugate complex poles,which means the dominant and second pole turn into
conjugate complex pairs.
from the view of transfer...
for a circuit design, whether simple or not, tran simulation is an essential because it is the most reliable.
you should run tran simulation in each part of your pll to confirm its function and performance.
VCO:pss and pnoise simu to check the phase noise performance.
tran simu sweep the...
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