Hello , i have designed a basiclow pass filter circuit using next i want to match it to the input and output
Z=sqrt(L/C) =0.707ohm
so i put 0.707Ohm on the output to match it.
so there are no ringing overshoot but i get a -6dB value at the output.
In filter design i need to have 0dB output.
Is there a way to get 0dB responce?
Thanks.

 

UPDATE:

When I removed the input resistor i get 0dB on the output.
What is the logic of reflection coefficients which does with one resistor 0dB on the output but when i put on both sides i get -6dBV output.
Thanks.

 

which does with one resistor 0dB on the output but when i put on both sides i get -6dBV output.

If you remove the filter inductor and capacitor you will still see a reduction.
R1 and R2 form a voltage divider that reduces the voltage across R2 by 1/2.

 

Hello crutchow, so if i have a signal generator Agylent 33220A signal generator.
What is the series resistor i should use?
Thansk.

 

0.707Ω is no a realistic resistance.
Design the filter so it has a matched impedance to that of your signal generator.

 

Hello crustchow ,In the datasheet of ucc5304 section 9.1.1 they say not to input delay lines
I still want to to enter a delat line into UCC5304.Is there a clue in the datasheet whereis says what in the input impedance of the input to ucc5304?
https://www.ti.com/lit/ds/symlink/ucc5304.pdf?ts=1715329802200&ref_url=https%3A%2F%2Fwww.mouser.co.il%2F

 

Hello crustchow ,In the datasheet of ucc5304 section 9.1.1 they say not to input delay lines
I still want to to enter a delat line into UCC5304.Is there a clue in the datasheet whereis says what in the input impedance of the input to ucc5304?
https://www.ti.com/lit/ds/symlink/ucc5304.pdf?ts=1715329802200&ref_url=https%3A%2F%2Fwww.mouser.co.il%2F

If you look at the block diagram on the datasheet, you can see a 200k pull down at the input stage.

 

Hello , I cant see a 200k resistor .
what is the number of the diagram?
Thanks.

 

Hello , I cant see a 200k resistor .
what is the number of the diagram?
Thanks.

8.2 Functional Block Diagram

 

Hello , so I need to match 50 ohm LC ladder to 200k
Is there a way to do an LC transformer ?
How do I know that the LC section is “quarter wavelength “
Phase of 90 degrees.
Also it’s impedance needs to be sqrt(50*100k)
1.
how can I know at what frequency to design my transformer given The rise tiMe
2.how can I know the phase of the section is lambda/4 ?
Thanks .