Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Hello everybody!
A collegue of mine asked me the favour to find a suitable amplifier for some experiment he would like to perfom with his class.
I have a -100dbm signal at 5 MHz and I need it to amplify it to some mV level in order to be displayed on an oscilloscope. The signal bandwidth...
Thanks,
I had a similar idea, the configuration would be:
-D input always high
-pulsed input connected to CLK
-output delayed and connected to the RESET pin
My only doubt is about the reset part: On Semi datasheets say that the reset is an "Asynchronous Reset" and sets the level of the...
Hi,
I have a PECL trigger signal at a frequency of 40Mhz and pulse width that can be as low as 1-2 ns and I need to adjust the lenght of the pulses using a monostable to 5-10 ns.
Since the pulses are very fast and the rest of the logic on my circuit is PECL I thought about using some...
Ok,
just to help others with a problem similar to the one I am experiencing:
- I haven't found the cause of the unwanted spike: maybe a bad grounding layout, maybe radiated noise from the inductor
- I found a way to filter it out thought... I put a couple of 100nF ceramic capacitors on the...
Hello everybody,
I have designed an inverting dc dc converter using a MAX1847 controller (f = 300kHz):
**broken link removed**
My circuit is identical to the application circuit presented in the datasheet. With the following components:
L = 560uH
Cout = 3 x 33uF Tantalium (ESR= 10mohm each)...
@ Karesz. How could I have said that a BJT has a drain and a source? :-s ehehe... Thanks for the correction.
I like the idea of the current generator but I can't get it to work, at least on my SPICE simulator. I am quite sure I don't need a base resistor since the current is fixed through the...
Thanks for the reply!
Dick's idea is good but the component count is pretty much the same as mine plus to delay the clock I need a long trace on my pcb or a delayer and that means a lot of space required.
Karesz, if you read my description more carefully, I won't feed the LVPECL signal...
Hi Everybody,
for a university project I have the need to check for the presence of a trigger-in signal in my apparatus.
- The signal is a digital clock with a variable frequency in the range 1MHz - 50MHz.
- I can detect this signal either from the negative output of a LVPECL XOR (Low level...
Thanks biff44. I like the idea of the big capacitor. I will try some spice simulations to see what size I need to limit the overvoltage to 20V (the maximum that the PA can take).
I will also go through some AVX and Vishay datasheets... there might be some very low capacitance diodes.
I have...
As I have writted in my previous posts, this bias tee needs to bias a power amplifier:
HMC637LP5 (https://www.hittite.com/content/documents/data_sheet/hmc637lp5.pdf)
The power amplifier ouputs on a 50ohm line that goes to a photodetector.
The photodetector is a SPAD (Single Photon Avalanche...
The values of L and C are so high because the low freq of the bias tee is around 100khz. Basically the waveform coming out of this MMIC amplifier is a squarewave that must have:
- 200ps rise time
- no oscillations (or 1% limited ones)
- 40 MHz period
- duty between 10% and 90%
- the on...
This is a simple schematic of my design. I am at my parents' home now and I don't have the values of L2 and L3 but they are around some tens of uH.
It's my first time designing a bias tee but if the inductors behave like in switching power supply,if the voltage on the positive rail is...
Hi Everybody,
I am Gianluca, an EE Master's student from Italy.
This is going to be my first post in this forum but I have read you for quite a while now.
I am designing an ultrafast pulser to trigger a photodetector. The last stage of this pulser is an MMIC PA from Hittite.
I developed a...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
