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Hi, All, I am working on the SSCG, some question for you.
Normally, there are two type of sscg . one is to modulate the vco control voltage . another is to modulate the divider ratio. Using the delta sigma
modulator is the common way to control divider. But how to control the delta sigma...
Hi, I am trying to design a Li ion battery charger. after reading some datasheet, I found that the smooth switching from constant current mode to constant voltage is critical point. I found that implementation in LTC4062 is quite interesting. here I have some question about it
1), why the bulk...
In the second order control systerm
Hclosd(s)=Wn^2/(S^2+2EWnS+Wn^2), where E=damping factor.
Normally, the larger damping factor, the more stable for the systerm.
In third order type II PLL,
Hcolsed(s)=Wn^2(1+S/Wz)/(S^2+2EWnS+Wn^2),
Here: Natural Freq: Wn=sqrt[(Kvco*Icp)/(2*pi*Cbig*N)]...
Hello guys, some question about pipeline ADC Front end SHA?
1, what's the capacitor mismatch requirement ?
I found that many thesis say ΔC/C< 1 LSB, why it isn't 0.5 LSB? If the ADC resolution is N, ΔC/C<1/2^(N+1) or 1/2^N?
2, how to do the AC simulation for the OTA used in SHA?
I know ,for...
Hi, I am a new pipeline ADC designer. what's the design procedure? and what simulation need to do ? For example, a 100M 10bit pipeline ADC?
Thank you in advance.
pll bandwidth
1,
When designing PLL, it is always said that PLL's bandwidth should be set to be smaller than Fref/10. what's the PLL bandwidth? Is it Wc(open loop unit gain bandwidth), Wn( Natural frequency) or W-3db ( closed loop -3db frequency)?
2,
and I know Wc means the frequency where...
pll bandwidth
1,
When designing PLL, it is always said that PLL's bandwidth should be set to be smaller than Fref/10. what's the PLL bandwidth? Is it Wc(open loop unit gain bandwidth), Wn( Natural frequency) or W-3db ( closed loop -3db frequency)?
2,
and I know Wc means the frequency where...
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