11 Threads found on edaboard.com: Mirror Pole
Hello Analog guys
I designed a current mirror OTA with a partial positive feedback, the circuit is like the one I attached from Gregorian book, Figure Nr. 3.41.
After I finished the design , I have simulated the circuit with and without the positive feedback as shown in the first and second image respectively.
Here I have a couple of ques
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 02-04-2013 14:01 :: Junus2012 :: Replies: 21 :: Views: 1720
dear every body
could you pls tell me what is the physical meaning of the mirror pole and rezo ?
many thanks in advance
Analog Circuit Design :: 06-29-2012 06:49 :: dinosaur078 :: Replies: 0 :: Views: 890
I notice for some current mirror implementation includes a series resistor that is connected to the gate of the diode-connected transistor of the current
May I know the the purpose of the series resistor?
Thanks a lot.
Analog Circuit Design :: 04-28-2012 13:16 :: jamesbond939 :: Replies: 3 :: Views: 1102
im designing an OTA telescopic wid certain gain enchancement modification architecture wid current mirror technique .018 technology...
i got my gain enchanced by 6 db bt my phase margin got very much decreased to 54 from 78.... what shud i do to bring pm to more than 60 ...i took currents as 200uA for the ota...suggest
Analog Circuit Design :: 06-26-2011 08:01 :: satyanitt :: Replies: 4 :: Views: 1520
can you tell me the differences between "the basic differential pair" and "the differential with active current mirror" ?
i know the latter increases a "mirror pole", i.e., it has worse stability.
what are the other advantages and disadvantages of the two circuits ?
plz help me, thanks in advance.
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 01-29-2011 23:10 :: sevid :: Replies: 9 :: Views: 2933
I am running a pole zero analysis via cadence spectre on a two stage opamp which consists of the classical diff pair with current mirror load and as second stage the classical common source/inverter problem is that i cannot see the RHP zero that is created via the feedforward path of the miller compensation capacitor...All t
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 05-26-2010 11:33 :: jimito13 :: Replies: 0 :: Views: 1674
like the figure, the solution is a pair of conjugate pole and zero.
but I think it should be a mirror pole and an output pole. why ?
And when I plot the frequence response (bode plot) , the position of pole is only
the real part of it ,or the amplitude of complex number.
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 12-15-2009 21:30 :: wangkes9 :: Replies: 0 :: Views: 868
This is the popular wilson mirror. This is negative feedback and can become unstable. Do a websearch to know more about it.
i think shd be no problem because only have one inversion in the loop or one gain stage and one dominant pole.
Analog Circuit Design :: 11-23-2008 23:48 :: surianova :: Replies: 4 :: Views: 961
These are my observations:
1. R1, C1 to compensate the zero due to mirror T3-T4.
2. C4 creates pole as in the paper.
3. C3 compensates the zero due to T2 (it is almost like a capacitor from gate of T2 to drain of T1).
I am not sure about C5, and the role of T5 and T6 (some startup ?)
Analog Circuit Design :: 06-12-2007 12:33 :: panditabupesh :: Replies: 6 :: Views: 1997
I'd say that the poles can be divided into two groups:
-poles in the opamp: Miller pole and mirror pole (that should be the non-dominant one)
-poles of the LDO: there are those cause by the opamp, the loading of the pass device on the opamp will create another pole, and (...)
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 12-13-2006 11:08 :: jonashat :: Replies: 6 :: Views: 1122
It can be generated by current mirror in differential amplifier... also in the case of pole-zero cancellation, when components are not perfectly matched.
The effect of pole-zero doublet could be not clearly seen in the amplitude and phase response, especiaqlly if the case if they are closed together, but relativlly small mismatch can have (...)
Analog Circuit Design :: 06-22-2006 14:22 :: pixel :: Replies: 12 :: Views: 11154