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Recent content by pozzugno

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    Low-cost FPGA development kit

    I'm finding a low-cost FPGA development kit/board just to start working with them. I'd like to make some tests with soft processors inside the FPGA. I found two boards: BEMICRO from Altera (49$) and LX9 Microboard from Xilinx (89$). Have you any other suggestions? What do you prefer between...
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    Overcome voltage limits on HCT flip-flop

    I don't know if this is the correct forum section to post this question. Sorry if I'm wrong. I want to use D-type flip-flop 74HCT74 as a trigger: when I open a switch, the output should change and should stay changed until a reset signal. The switch is connected between ground and +24V through...
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    LM5576-based SMPS problems

    I'm designing a small SMPS based on National LM5576 all-in-one (MOSFETs integrated) buck converter. Vin is 50V and Vout is 28V (duty cycle 56%). The output current should change from 0A (no load) to 2.5A maximum. I'm using 47uH inductor and 330uF low-ESR output capacitor. I set the maximum...
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    Fast peak detector and alarm on a programmable threshold

    Hi all, I explain my problem. Please give me some ideas. I have a signal from a sensor. The signal has pulses each 20ms. Each pulse has a duration of about 100us. I want to design a very fast circuit that compare the maximum value of the signal with a digitally controlled threshold. When only...

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