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I'm picking a Minicircuits balun(attached) for my receiver IF path@150MHz. The receiver has 5 IF channel so there would be 5 baluns in a small space, like 2"X3". I'm a bit worry about mutual inductance coupling between these baluns. Any one has experience or suggestions on this? or nothing I...
I misunderstood your first reply on the 90 degree. Now I got it.
What about the dots? The right one has a dot at input side and a dot at output which I think means the output would be in phase with input.
However the left one had 4 dots at output. what do they mean?
That's what I guessed. It's easier for me to understand the right one.
My confusion is, If pin 1 of the left one is single-ended input, the output at pin4 and pin6 would be in phase and same amplitude would not be a differential output. Is it correct? then in what kind of application this balun...
anyone know a small size balun working around 150MHz? The smallest ones I found is from minicircuits with footprint of 3.8mm by 3.8mm. Any other verndors provide smaller one?
This is for small signal applications.
Wondering how to tune a non-50ohm LC filter.
I need to interface a LC filter to AGC which requires 200ohm input impedance. Is it easy to design with ADS and tune it on bench?
Re: RF transfomers/balun
E seems a balanced to single-ended. Can I ground the balanced side to make it single-end to single-end. Then why not D?. What about the options F and up?
The application is narrow band about 20MHz. I found even the narrowest one is with BW of 300MHz.
Is there any...
I'm looking for a RF transformer for a 50ohm line to 200ohm input AGC @140MHz. There are so many choices of 1:4 transformers.
Can someone give me idea how to select them? What is the differences between transitional transformer and transmission line transformer? Thanks.
I'm design a test pad circuit to sense IF power coming out a differential driver to ADC. IF is 130MHz. Since the layout limitation balun is not able to used to convert differential to single-ended. A 25dB resistive pad is used to sense the power as attached. A pigtail will be connected between...
Happy new year!
It's a while I left the forum and finally got chance to come back. Glad to see so many suggestions and links been threw in. Great appreciated!
BUT! I'm still confusing what to do to verify stability on a lab bench for a multistage amp. --anyone did this for your design?
The modulator is ADL5385. The datasheet says in page 13 "Baseband Inputs: The baseband inputs QBBP, QBBN, IBBP, and IBBN must be driven from a differential source. The nominal drive level of 1.4 V p-p differential (700 mV p-p on each pin) is biased to a common-mode level of 500 mV dc."
This may be a basic question: Why do we need DC offset for a modulator?
I'm working on a base band filter interfacing DAC and modulator. The modulator datasheet requires 0.5V DC offset at its input. Why? Why not the modulator generate such a offset inside?
Another question I have is : some...
Assume it's -50dBc, How much DPD can help it improved?
I was thinking about RF filters, but all the researchs are unsuccessful. I hope DPD could somehow help.
Thnaks Volker for your input.
In the prototype I had mask issue which led me to the filter approachs, fixed or tunable. All types of filter solution returned answer No, except cavity filters. Major concers are fc accuracy and temperature stability.
There is chance for different system design...
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