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  1. T

    spectrum analyzer uwb signal measurement

    Hi all, First of all, my problem is about using spectrum analyzer for measuring uwb signal and I am not sure whether it is a right place for my question. If not, please notify me. I use a handheld spectrum analyzer to measure a antenna output of a uwb transceiver. In fact, this is RTU7010...
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    FPGA driven by external clock

    I have got a altera stratix II dsp board and built a nios softcore cpu inside. I try to drive the fpga using a clock from a external hardware. My problem is the clock form external hardware cannot drive the PLL inside the fpga. When I monitor the clock to be input to fpga, the duty cycle is...
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    Looking for timestamping IC

    Hi all experts, Hope my question is not off topic in this forum. I need to build a hardware based timestamping system, with accuracy of nanosecond. Is there any IC available for doing this? ttse7
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    SRD sub-nanosecond pulse generator

    Hi all experts, I intend to build a transistor to amplify the signal. Which amplifier class should be used? Class A or Class B. ttse7
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    SRD sub-nanosecond pulse generator

    mirabella2, I think I can get the idea from the article. I have ordered the components. Are you a russian girl? Added after 4 minutes: has_ajam, I have not tried to modify the value of the input cap. to 1nF. Let try next week. I have deleted the short circuit stub and found the...
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    SRD sub-nanosecond pulse generator

    mirabella2, The article in the link is russian but the idea is simple. To Biff4, your idea refreshes my mind and your help is useful. Best regards, ttse7
  7. T

    SRD sub-nanosecond pulse generator

    biff, I have tried your suggestion but no signal comes out. Is this possible to amplify the small signal? ttse7
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    SRD sub-nanosecond pulse generator

    srd pulse Hi all experts, I have been asking for help of pulse generator using Step Recovery Diode(SRD). Recently, I make a circuit but the output amplitude is very small(30mV pk-pk). Which part is wrong? I attach the circuit diagram and the output waveform here. The input signal is...
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    SRD short pulse generator

    comb generator schematic biff4, thanks for your comment. I follow the circuit found in HP applicatio note 918. In the circuit I follow, it does not have any inductor. May be I do not fully understand the circuit configuration. It must be something worng but I still wonder which part brings...
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    SRD short pulse generator

    srd pulse generator Hi all, This is ttse7 again. Sorry I keep asking the same type of question here. I plan to make a short pulse with 0.5ns pulse width. I follow the HP application note 918 and build with lump elements, the SRD is from M-pulse, MP4023. The final result is that the pulse...
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    100MHz square wave generation

    sorry to whom have answered my question and I am very grateful to your help. I forget to mention that the peak voltages of the square wave is +5V and -5V. The usage of this square wave is to drive a Step Recovery Diode. Thanks for your answer again.
  12. T

    100MHz square wave generation

    Thanks, but what I need is a square wave, output from crystall oscillator usually is sine wave.
  13. T

    100MHz square wave generation

    Hi all, I need to build a circuit which can output a 100MHz square wave. Probably there is no IC to do this. Can anybody here help? Thanks a lot
  14. T

    Step recovery diode model in ADS2005A

    Hi, I have a Step Recovery diode with the following parameter: Vbr=20V Cj6=0.5pF(max) Rs=0.8ohm tt=50ps tL=15ns Which component should I use to model such device since there is no exact SRD model in ADS2005A. Please help ttse7
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    Step recovery diode (SRD)simulation

    ads step recovery diode so which srd are you using? I use the one from M-Pulse.
  16. T

    Step recovery diode (SRD)simulation

    step recovery diode Hi all, I would like to do a impulse circuit based on SRD. In agilent ADS2005A, there is no SRD model library. How can I model SRD in ADS2005A. Thanks ttse7
  17. T

    ULTRA WIDEBAND POWER AMPLIFIER DESIGN

    a nice document, let have a look
  18. T

    Help me design an ADC for UWB tx/rx

    Re: ADC for UWB tx/rx In the market, there are many adc IC that can meet your need. Try Analog devices or TI. Let exchange any ideas because I am now working on UWB system.
  19. T

    Designing Comb Generator using SRD

    Re: Comb Generator But how to get SRD at a cheaper price is the problem?
  20. T

    Which company offers Step Recovery Diode for around $20?

    Re: Step Recovery Diode biff44, Thanks for your suggestion and the PIN diode looks good and suits my need.

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