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Recent content by Dymtra

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    Design of a Differential CMOS Amplifier

    Ok, I'll post it tomorrow because I only have access to the simulator through my University and i don't remember quite well the last values I used
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    Design of a Differential CMOS Amplifier

    I'm using a 130nm process, from the diagram I can see that lambda it's not constant, so in order to choose the lenght values i must have this kind of diagram for my process? Also I've tried to simulate the circuit, but i can't get the three p-MOS to get in the saturation region, they always...
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    Design of a Differential CMOS Amplifier

    Hi, I am designing a CMOS differential amplifier for a course, I must obtain a gain of 20 dB and a cutoff frequency of 100 MHz. This is the circuit I got my transfer function, and from there my gain is given by , i can see that it's given in terms of the transconductance which i can obtain...
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    PIC18F4550 USB, Data overflow??? Help

    I'm using a generic class. My endpoint is Toggle type. And i send a character say "a" from PC1 and then i receive it in PC2 but when i send another character from the PC1, the PC2 receives an "í".
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    PIC18F4550 USB, Data overflow??? Help

    Hi, i'm trying to send and receive data from one pc to another via USB, i'm using two PIC's 18F4550 and VC++. The problem is that it only works once in each pic, what i mean is that i can send from pc and receive in the other one, and do the same in the other PC, but after this i only receive...
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    [SOLVED] PIC18F4550 USB Same VID, PID Help

    Solved!!! I just had to change the VID and the driver =)
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    [SOLVED] PIC18F4550 USB Same VID, PID Help

    I used USBDeview to see all the information on the USB devices recognized in my computer, but even when it recognize the PIC the serial number still doesn't appear. And i was thinking since in the Device Descriptor is the USB_DEVICE_DESC[] defined, maybe in the PIC program i could get that it...
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    [SOLVED] PIC18F4550 USB Same VID, PID Help

    Yes I know that in the code it says something about the serial number, but the problem is that the driver mchpusb doesn't support it. How can I access the serial number?? Is there a VC++ function for this?
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    [SOLVED] PIC18F4550 USB Same VID, PID Help

    This is the header i use to declare the Class in VC++ // USB.h: interface for the USB class. // ////////////////////////////////////////////////////////////////////// #if !defined(AFX_USB_H__801FD7DD_554C_4197_A9AF_6A4FC934E5FA__INCLUDED_) #define...
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    [SOLVED] PIC18F4550 USB Same VID, PID Help

    I'm using a special header (that was provided at class) for the compiling for the PIC. Here i found the device descriptor part you mentioned. But i'm not really sure what to modify. ////////////////////////////////////////////////////////////////// /// /// start device descriptors ///...
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    [SOLVED] PIC18F4550 USB Same VID, PID Help

    Hi, I've managed to connect the PIC18F4550 via USB and the PC recognized it, the problem is that i need to connect a second one, but where do i tell the PC is a different PIC?. I know that i can't use the serial number option due to the limitations of the microchip driver. I'm using Visual C++...
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    [SOLVED] Help!!! LCD Initialization Parallel Port

    Hi!! I'm trying to initialize an LCD 16x2 JHD162A, i'm doing it through Visual C++ 6 and the parallel port, but the problem is that it only responds to the first command that indicates the 8 bit interface, i'm using the following diagram: **broken link removed** This is the code im using so far:

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