LMV321-N, LMV321-N-Q1, LMV358-N, LMV358-N-Q1
LMV324-N, LMV324-N-Q1
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SNOS012I –AUGUST 2000–REVISED FEBRUARY 2013
(23)
where for all three filters,
(24)
(25)
A design example for a bandpass filter is shown below:
Assume the system design requires a bandpass filter with f = 1 kHz and Q = 50. What needs to be calculated
O
are capacitor and resistor values.
First choose convenient values for C1, R1 and R2:
C1 = 1200 pF
(26)
(27)
2R2 = R1 = 30 kΩ
Then from Equation 24,
(28)
From Equation 25,
(29)
From the above calculated values, the midband gain is H0 = R3/R2 = 100 (40 dB). The nearest 5% standard
values have been added to Figure 63.
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