Continue to Site

Welcome to EDAboard.com

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.

Register Log in

help calculation values for bandpass filter

Status
Not open for further replies.
H

Haze1234

Newbie level 2
Joined
Jul 27, 2017
Messages
2
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
16
Hi can someone tell me bitx40p2_bpf_ckt.pnghow to analyse this circuit?
 

You could use node analysis or loop analysis. Do you have a more specific question?
 

Well, you first have to know what the input and output impedances are. Since the filter is symetrical, the input and output impedance is the same.
 

As i understand that C1 and C7 are for the input/output impedences based on the frequency, but what about C3 and C5?
And how all the series 3 stages LC define the bandwidth of the filter? If they have the same value?
Thanks
 

Haze1234 said:
As i understand that C1 and C7 are for the input/output impedences based on the frequency, but what about C3 and C5?
And how all the series 3 stages LC define the bandwidth of the filter? If they have the same value?
Thanks
Click to expand...

This is Band-Pass Filter approx. @7.1MHz Center Frequency.
7.1MHz.png
 

how to analyze a circuit for RF? You could download a free version of Spice, or maybe Qucs, and just input the component values and analyze it.

The above comment about "impedance" is important though. Is it a 50 ohm generator and a 50 ohm load? Or is it a voltage source, and high impedance oscilloscope for a load? Makes a huge difference in the response.


https://www.microwaves101.com/encyclopedias/free-eda-software
 

The above comment about "impedance" is important though. Is it a 50 ohm generator and a 50 ohm load? Or is it a voltage source, and high impedance oscilloscope for a load? Makes a huge difference in the response.
Click to expand...
You can conclude that at least one port has a resistive termination, otherwise the filter gets resonances with infinite Q.

The filter topology is called coupled resonator, the shunt Cs are providing the coupling.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top