RF2670 Ver la hoja de datos (PDF) - RF Micro Devices

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RF2670

8MHZ DUAL BASEBAND AGC WITH PROGRAMMABLE LOW PASS FILTERING

RF Micro Devices 

RF2670

Differential Filter Design Information (Cont.)

Bessel Response

RS

L

C1

RS

L

RL

C2

RL

10

C1

=

-C----1---b----w-----⋅----12------⋅---1---0---1--2-

2 ⋅ π ⋅ fc ⋅ RL

;C

2

=

C-----2---b----w-----⋅---12-------⋅---1---0---1--2-

2 ⋅ π ⋅ fc ⋅ RL

;L

=

-L---b---w------⋅---R----L-----⋅---1---0---6-

2 ⋅ π ⋅ fc

C1bw = 2.9825;C2bw = 15.4697;Lbw = 0.0860

RS = 125;RL = 1000;R-R---L-S- = 0.125

100000

10000

1000

100

10

1

1.E+05

Differential LC Filter Component Values

(Bessel Response)

1.E+06

Frequency

C2 (pF)

C1 (pF)

L (µH)

1.E+07

10-50

Rev A4 010820

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