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Digital BandPass Filter

Generated by: http://www-users.cs.york.ac.uk/~fisher/mkfilter
2 pole bandpass filter with 1200Hz sampling

Recurrence relation:

y[n]	Current output
y[n-1]	Previous output
y[n-2]	2nd Previous output
x[n]	Current input
x[n-1]	Previous input
x[n-2]	2nd Previous input

What the terms mean:

y[n] = ( -1 * x[n- 2])
+ ( 0 * x[n- 1])
+ ( 1 * x[n])
+ ( b * y[n- 2])
+ ( a * y[n- 1])

x[n]

y[n]

+

x[n-1]

y[n-1]

x[n-2]

y[n-2]

*a

*b

*1

*-1

*0

input side summation is simplified to x[n] – x[n-2]