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Recent content by Pictou

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    SRAM design, books' name request

    Hello everyone, I have been assigned to design a 6T SRAM (high speed, a few GHz). I've never done this before and I'm now looking for books that could help me in order to know better about the subject. As my budget is low, I don't want to buy a book that doesn't contain enough information or is...
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    [SOLVED] NMOS transistor, question about Vgs

    Thank you for your help and the Scribd website, I didn't even know its existence. I will mark this subject as solved.
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    [SOLVED] NMOS transistor, question about Vgs

    Thank you very much for your help. I'll look for reverse-bias breakdown on google to learn more. There is just something I don't understand, if source and body are connected at the same potential, why would they be in reverse-bias breakdown as they are connected to each other? I'm not really...
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    [SOLVED] NMOS transistor, question about Vgs

    Hello, I would like to know what happens to a NMOS transistor when Vgs < 0. My problem is that in one of my schematic Vgs = -1.3 V. Will it break? I tried to find the answer on the internet but nothing about Vgs < 0 for a NMOS (or Vgs > 0 for a PMOS) On the forum, people talked about Tsividis...
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    DS18b20 reading too high - 8051

    Okay I'll try to help you from the beginning. It might not be the problem but my delays are a little higher than yours. For reset sequence : Your code will be in quotation Assuming delay(29) is 480 us, (you need to make sure of that with an oscilloscope for example). For the second delay...
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    DS18b20 reading too high - 8051

    Have you tried increasing the delays? I think that when the DS18B20 sends 0xffff it means that he didn't have enough time to sample the temperature.
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    [SOLVED] Question about clock in microcontrollers

    Thank you very much.
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    [SOLVED] Question about clock in microcontrollers

    Hello, this thread is not about programming so I'm sorry to post it here, but I think this section suits the most to my question. My question is the following, what is the amplitude of a clock signal for a microcontroller? I know that it's a square signal with a fixed frequency, but what is the...
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    Trouble understanding crystal oscillator schematic

    Hello, I'm having some trouble understanding this schematic : **broken link removed** It's a curcuit from the article named : High-Performance Crystal Oscillator Circuits : Theory and Application, written by ERIC A. VITTOZ, MARC G.R. DEGRAUWE and SERGE BITZ. From the forum rules, I understood...
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    Measure the open loop gain of an Oscillator

    Hello, I tried to search how to do it on the forum but every open-loop gain calculation I found were related to amplifier only. So here is my question, I designed an oscillator (pierce oscillator with quartz) with CMOS transistor. I would like to measure the open-loop gain and phase at the set...
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    Pierce Oscillator, Oscillations are going down. Cadence software.

    I'm still investigating, as even if my circuit "works" (still unsure if I can say that it works), I'm not following theory results at all....
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    Pierce Oscillator, Oscillations are going down. Cadence software.

    The simulation was actually badly configured. I used a harmonic balance and I could see the oscillations. Why is the phase and magnitude wrong? am I not supposed to have a phase of -180° at least? I'm a little beyond that. About the gain, am I not supposed to have a gain superior than 1 to...
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    how to simulate crystal oscillator phase noise

    I'm doing the exact same thing right now, and for the noise I use the hbnoise simulation, you can find a tutorial here : (Be sure to use IC615 ISR14 or later to see the new MMSIM12.1 features in the GUI)...
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    Master and multi Slaves problem I2C

    okay that's what I thought, then he must have a command to get the address from a slave right? Connect only one slave, get that address, write it down, connect the other slave and do the same.

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