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Thank you for the replies. Unfortunately I also can't see the attached files from the mentioned thread by tepalia02, and I can't access the page proposed by TickTek.
Hi everyone,
I am looking for the matlab files associated with the exercises from the book Data Converters by Franco Maloberi.
I know they were posted here http://ims.unipv.it/ but currently the site is down. I also did a google search but nothing showed up.
Does anyone...
Hi frankrose,
Sorry for the very late reply. I haven't used this circuit yet, since a simple bandgap satisfied my needs until now. If you try it share with us the results :thumbsup:
Hi,
You can google this paper:
Curvature-Compensated BiCMOS Bandgap with 1-V Supply Voltage - Piero Malcovati.
The bandgap in this paper has 0.54V, maybe it helps.
Hi,
To derive this equations paulmdrdo applied correctly Nodal analysis at node labeled V1 and V2 to get Vo=-2.5V, and incorrectly at nodes labeled V1 and Vo (as poined out by tyassin).
The correct set of ecuations are:
1.Applied at node V1 and V2:
2mA= V1/5k+(V1-Vo)/10k+V1/20k
V1/20k+Vo/10k=0...
Hi,
Your input is not 200mV, it's 400mV. You have 200mV on Vip and -200mV on Vin. Since this is a differential input Vip-Vin is 400mV.
If the load is the OTA to be tested connected in unity gain feedback path (this means the load acts as a resistor of value 1/gm), the the output voltage will...
Hi,
I hope you noticed that one of the diode connected PMOS has the bulk to gnd!. This is bad.
I don't think your CMFB circuit si working. You can use two resistors as cmfb, as shown in the images below, to verify your bias. Pls note that the values of the resistors are prety high, and this...
Hi,
Transconductance is defined as i_out/v_in. Voltage gain as v_out/v_in, current gain as i_out/i_in and transresistance as v_out/i_in.
The DC gain of a single stage OTA is R_out*i_out/v_in. By using gain boosting, you increase the output resistance of the stage thus increasing the DC gain...
Hi,
I understand now why you want to increase the number of quantizier bits. I've made a DSM some time ago, but it was only second order, one bit quantizier. I know that for more bits you must use different algorithms to liniarize your DAC so your SNDR won't degrade.
Hi,
If you apply a voltage step at the input of your amplifier (at t=0, for example), your output voltage will be composed of two regions. The slew rate region, and the linear settling region. The slew rate region will be the first part, because there is where the derivate of the output voltage...
Hi,
Yes, if you want the required SNR, SNDR you need to work on noise and on switches. I don't think you need boostrapped switches everywhere. You need them in places where you see that the VGS of a normal switch varies a lot (because this is what makes the on resistance nonlinear).
Hi,
If you want more SNR, there are three ways: increase OSR, increase modulator order (I don't think you want that), increase the number of bits. If you choose to increase the number of bits, you must make sure that your DAC has sufficient linearity, because it's error directly affects the...
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