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Dear all
I met a fatal error duing runing cadence AMS simulator. The version of ncsim i used is IUS8.1 and the spectre version is MMSIM7.1.
In the end of log file, it appears the following error information
"you have no permission to run spectre circuit simulator"...
two stage cmfb
Try to use continuous time CMFB firstly, if the cointinuous time CMFB is correct then replace the resistor with switched capacitor. It is to be noted that the feedback must be negative. Don't connect it as a positive feedback!
sixth
Re: complex ADC papers
Hi, laglead,
The complex ADC is also called quadrature ADC. It accepts the quadrature signals as the input and outputs quadrature signals. Because of the complex operation, the frequency response of this kind of ADC has single side characteritic. It is very useful...
Re: Question on RFIC
Hi,bigheadfish
The effictive value is equal to (sqrt(2)/2)*Vp and equal to (sqrt(2)/4)*Vpp. So, 20V is the corret answer.
The dBm is a measurent of power that is relative to 1mW. The equation is dBm=10*log(P/1mW), where P= V^2/R, V is the effective value of the...
You can build up a simple Gm-C integrator with a first order approximate Gm cell and then write its transfer function. Comparing with the ideal one, you will find the rule.
Re: stability
It is very difficult to eliminate the peaking. Fow low frequency application, you can change to miller compensation tu push the peaking far beyond the GBW. Fow high frequency application, it is profer to choose PMOS as differential pairs and NMOS as output device. Since the...
Re: stability
Yes, this kind of gain peak in frequency response is very dangerous and can cause stability problem. Usually, the amplifier like folded cascode with cascade compensation and amplifier with gain booster has the gain peak in frequency response. It must be eliminated.
sixth
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