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Quartz_Crystal_Filter_Designer_2.php   13392 Bytes    16-07-2014 00:20:01


Quartz Crystal Bandpass Filter Design


Calculation of the Components



As we bought a huge batch of quartz crystals and sorted them in part #0, found the replacement data in part #1, we now may assume all crystals to be equal. This is part #2, the calculation of the filter components. Part #3 will then build and measure this thing.


QUARTZ CRYSTAL EQUIVALENT DATA

Frequency

  [MHz]

Cs

  [fF]

Cp

  [pF]

L

  [mH]

R

  [Ω]



BANDPASS FILTER REQUIREMENTS

Bandwidth

  [kHz], Design Goal

Ripple

  [dB]

Topology

 

Order

  (Number of crystals)




DESIGN DATA FOR YOUR CRYSTAL FILTER





The calculations are inspired by the paper Design and Realization of Crystal Band Pass Filter Using Discrete Crystal Resonators by Satish Nandanwar, Mrs. Anjana Patel, Surinder Singh. Space Applications Center, ISRO, Ahmedabad, Gujarant, India. International conference on Communication and Signal Processing, April 3-5, 2013.




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t1 = 3913 d

t2 = 560 ms

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