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Recent content by bastos4321

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    CMOS opamp design procedure

    Look at the book from Sansen, Analog_Design_Essentials, cap. 5 and 6. Bastos
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    Need advice on area/power of ADC designed in CMOS technology

    Re: low area ADC For kHz, just use a SAR topology. It is suitable for 8-12bit resolution. Bastos
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    How to draw layout of capacitor

    how to draw capacitor What kind of error. Does not recognize the capacitor, or is due to having different area perimeter in schematic from layout. Use the same values in schematic that you have in layout. Bastos
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    How to draw layout of capacitor

    how do we layout a capasitors no need to have special care on the layout of this capacitor. Just use the available space after layout the transistors to draw the capacitor. Its value is not critical, since due to corners the spread on its value will be big. Bastos
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    What are the waveform viewers available ?

    Re: waveform viewer try spice explorer is a great viewer. Bastos
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    About CMOS opamp's offset

    It depends on the area of the input dif. pair. Vos +- Avt/sqrt(w*L) If you have a large area in the dif. pair, your offset will be low. The formula given is for one sigma vos. The total offset is usualy assumed to be 3 sigma (3 times that value). Regards Bastos
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    how to choose bjt for bandgap reference

    beta of substrate bjts Chose the one with bigest area to improve matching. Bastos
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    ASSURA VS CALIBRE VS DIVA

    I prefer Calibre. It is faster and easy to use. Bastos
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    how to low the noise of amp

    The noise of a two stage amp is set by the feedback factor and compensation capacitor. Increase Cc to get lower noise. Bastos
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    why capacitive loads are drived by OTA?

    ota gm ro The main problem is the open loop gain. The open loop gain is some thing like this Av=gm * Ro, where gm is transconductance of the amplifier and ro their output resistance. If you want a high gain Ro must be high, so you can not load the output with a resistor since this would...
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    AC analysis of switched capacitor filters

    Read this paper: Simulating Switched-Capacitor Filters with SpectreRF https://www.designers-guide.org/ Bastos
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    How I can exicute eda tool on windows-xp from linux server

    Re: How I can exicute eda tool on windows-xp from linux serv 1-Logon by SSH or telnet to the linux server. 2-Define your display : setenv DISPLAY x.x.x.x:0 (x.x.x.x is the ip of the win machine) 3- Send a terminal like "xterm &" or "konsole" 4- If the terminal did not succeed allow...

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