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Hello,
unfortunately, I don't know really:
the difference between "Hardware Engineering" and "Computer Engineering (not Software Engineering)".
Could someone explain it, please?
Many Thanks
Hello,
i have a problem to update the schematic of a cell regarding its layout by using synopsis.
In cadence, i know how, but unfortunately not in synopsis. There is a button for autom. Update for the layout regarding the schematic, but without any other options.
I would be thankful for your help.
Hello all,
I designed a FDA with a common mode voltage of 0 V, but the dymamic range of both outputs are not exact symetry. For example, the dc values of vout1 and vout2 are -500 mV and +500 mV, but their values at rising/falling edge are at one point: -210mV and +201mV. Is this problem for...
Thanks.
My quastion is, does the ac simulated gain loop indicate the gain (G) of the amplifier or the closed loop gain Gx=G/(1+G*A)?
" A" is the gain of the feedback.
Hi Klaus,
thanks for your reply,
the third figure shows both output signals of the fully differential amplifier for different A=Rx/Ry=1, 2 and 3.
The first and 2nd figures are zoomed.
Hello all,
with helping of replys to my last thread, I designed a fully differential amplifier with a gain "G", but i can not understand the gain of the whole circuit with a signal-feedback, as showed in the attached figure.
The gain of the whole circuit, I calculated as: A=Rx/Ry for example...
Many thanks.
I've already designed a FD-amp. The output signals swing between ca. -1.7 V and 1.7 V with an OCM of 0 V.
Now, with a designed CMFB, i am trying to set OCM at 0.8 V. In this case, vout should swing betwenn 0 V and ca.1.7 V, but unfortunately, it oszillates. Should I use frequncy...
many thanks, aryajur.
Regarding your explanation, I drew the output signals with a gain of 26.
The outputs of the input signals of 50 mV and 500m V would be 26*50mV=1,3 V and 1.7 V, respectively, if the supply voltages are -1.7 V and 1.7 V with a output common mode of 0.8 V.
Hello all,
I have a problem to understand fully differential amplifiers and also their CMFB.
I learned from theory vout2-vout1=A*(vin2-vin1) and the gain (A) is infinite.
But I don't understand, how would be the output signals of a FD-Amp with supply voltages of -1.7 V and 1.7 V and an...
Re: Why schould a Schottky diode be connected in parallel to resistor?
Thanks for your answer.
Because of parasitic effects, the spikes appear on Vout.
The Schottky diodes prevents the negative [spikes < (0 V-VD of Schottky] and positive spikes [spikes > (VDD+ VD of Schottky].
But which role...
Re: Why schould a Schottky diode be connected in parallel to resistor?
Thanks for your reply.
In the attachment is an example of a driver with two schottky diodes for an over voltage protection.
I understand, how the schottky diodes work but I can not understand, why should resistors be...
Why schould a Schottky diode be connected in parallel to resistor?
In some over voltage (or spikes) protections, a Schottky diode is used, which is connected in parallel to a resistor.
I can not understand the role of the resistor.
Could someone explain to me, please? Thanks
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