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Hi all,
I'm currently work on an oscillator using XO.
I want to characterize the phase noise and I've some strange behavior.
I've set the simulator by following the link below...
Hi everyone,
My issue is about a DC simulation.
When this one is finished, and I wanted annotate the DC operating points on the schematic, They are not displayed for all components.
For example, I've 2 dc sources, but the DC operating point is displayed only for one of them. I save all the...
Hi All,
I'm still on TT polyphase filter with current input and I saw a strange behavior in this structure when I'd simulated the CP1.
My Opamp is a classical 2 stages with a CMFB on activ load. In Open loop the gain is 58dB for a UGF at 27MHz and Phase margin is 45 degree.
The stange behavior...
Hi all,
My quesiton is about the pi number. Can i use it as parameter to define a component value ?
For instance, n a 1st order low pass filter
I've an ideal capacitor, where is value is defined by resistor and frequency values (give in CDF of the top cell) and the pi number.
The capacitor...
Hii,
I've no experience in verilog-A so, i hope that you can help me :)
I want to realize a box, which has a constant phase shift across the frequency.
An input has a AC magnitude of 1V and AC phase of 0 degree.
At the outputs, I want 2 signals:
- one with AC magnitude= input magnitude and a...
Hi,
I'm progressing on this test bench, i've some coherente results but I would like to improve these. My issue is about the dephasor box. It's done with RC combinaisons to get 90 degree, but this 90degree is done only for one frequency.
I'm trying to use dependent sources but they've no AC...
Hi,
First of all, I found some old topic about the question regarding the noise simulation, like this one:
https://www.edaboard.com/threads/148584/
My question is about a process to generate a noise simulation without all these steps, because do it for the worst cases and typical it's quite...
Following error about included picture
- - - Updated - - -
I found by simulation that the Gain is not impacted by Ra and Rb if the poles (Ra*C1) and (Rb*C2) are equal.
Hi.
So I've progressed in the comprhension of this filter. Following computing of transfert function I'm getting results corresponding to it. I've a new question. When the interconnect between I and Q to do the polyphase filter, the signal is introduced throw resistor and the theory saying that...
Hi,
Find in attached file the structure of the filter.
I've to redign it in new technology but I didn't find any information about it.
In fact, it's a fully differential band pass polyphase filter with center frequency of -1MHz but normaly a simulation of I (or Q) only give me an low pass with...
Hi,
iḿ currently work on plyphase filter.
I arrive to trace the correct frequency curve, where the cut-off frequency fit with the theory, but the gain.
I've a difference of 3 dB (more) with the theory.
So my question is:
Like 3dB=√2, when the calculator does the modul of I+jQ, the magnitude of...
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