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Recent content by cocopa

  1. C

    low power high efficiency switching regulator (5V to -28V)

    Hello, I have a 5V power supply from which I want to produce -28V, @500uA max load current. I've tried using lt1617-1 from linear technology but the simulation at LTspice shows an RMS current consumption of about 7-8mA, which is not acceptable for my application. Any ideas on improving the...
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    Microsemi FPGA, remove clock buffer

    Hello, I'm using Microsemi Libero Soc v11.8 to develop VHDL code for an IGLOO nano FPGA. The problem I have, is that for a certain net the tool automatically adds an input clock buffer and I am not allowed to allocate the net to the pin I want, only to global clock pins. How can I disable this...
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    Fast, low power sample and hold circuit

    Hello, I want to design a sample and hold circuit (discrete components, not IC) but I'm having trouble combining fast and low power... I would like an acquisition (sampling) time of a few ns, hold time (steady data) for at least 300ns and current consumption below 1mA. Any suggestions? Thank you...
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    Best way to "split" an analog signal

    Yes my mistake, I neglected to mention that. The signal is slow, a few hunderd kHz and maybe all these are not necessary at these frequencies, but i want to be sure that my signal won't be distorted. Even if i am exaggerating, i prefer to add a few extra components and extra caution to pcb...
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    Best way to "split" an analog signal

    Thank you for your replies! Actually the signals i'm dealing with have much smaller amplitude, 100-200 mV. I was thinking of using a buffer after the integrator and then with a T-junction (actually Y-junction in pcb, I think it's better in terms of impedance missmatch) route the signal a) to...
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    Best way to "split" an analog signal

    Hello, I'm getting an analog output from an op amp (connected as an integrator) and i want to drive it to an oscilloscope via a BNC connector, and also use as an input to a peak detector, also utilized with op amps. Is it necessary to use a buffer? And which is the best way to split and route...
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    Problem with a current transformer

    Thank you for your reply KerimF. I don't want to monitor current, i just want to boost up my signal,that means that a CT transformer is not suitable for my application? Then, if a CT transformer with 50 turns ratio won't amplify 50 times my input voltage what is its effect on it?
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    Problem with a current transformer

    Hello! I have a current sense transformer with 50 turns ratio and i want to amplify a sine wave from 1v to 50v and then convert it to dc, however the transformer doesn't seem to produce the desired output. I checked the specifications of the transformer and i don't exceed them,I'm within range...
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    suitable oscillator circuit for dc to ac converter

    Hello again!I finally used a relaxation oscillator (which draws very little current) but i'm having troubles simulating the circuit. When i simulate the oscillator circuit alone it works fine, but when i try to simulate it with the transformer and the voltage multipliers stages i get no...
  10. C

    suitable oscillator circuit for dc to ac converter

    I don't have any restrictions on that.I just want to keep the size of capacitors,inductors and the transformer as small as possible.
  11. C

    suitable oscillator circuit for dc to ac converter

    Hello, I'm designing a high voltage generator and I would like some suggestions. The oscillator will take a dc voltage (maybe from a 9v battery) to produce ac, a transformer will boost the p-p output and then some voltage multipliers will produce the desired dc ouptut. What type of oscillator...
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    "swiss cross" shape hole using Allegro pcb editor

    Re: "swiss cross" shape hole using Allegro pcb editor Unfortunately, there is no milling layer and on the routing layers i dont think i can draw holes.. - - - Updated - - - Thank you NIKHILRAJ, perhaps I 'll do something like that. But stil, there is no other way in allegro to...
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    "swiss cross" shape hole using Allegro pcb editor

    Hello! I want to create a large opening in the middle of my pcb,a shape like a swiss cross. How can I draw polygon holes in Allegro? Normally, when creating mechanical symbols I place a through hole pin with the dimensions I want for the particular hole, but I can only create rectangular or...
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    Problem with drill files on Allegro PCB editor

    The only difference is that while creating artwork i had checked the "supress leading zeros option" and at nc drill parameters i had checked the " supress trailing zeros" option. Could it be causing the problem?
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    Problem with drill files on Allegro PCB editor

    Hi! I'm using Allegro 16 and I'm having some problems with the drill files. I sent the files to the manufacturer and they said that the holes weren't alligned.. What procedure do i follow to generate the drill files when i'm using blind vias? Thank you.
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