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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...
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...
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
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...
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
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...
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...
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...
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.
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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