Band Pass Filter and Band Stop Filter New

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Band Pass Filter dan Band Stop Filter Oleh : Rachmad Nusanzali 115514039 Amalia Firdha 115514040 Fitriyah Dewi 115514041 Agusti Randi 115514043 Fulca Ugratara 115514052

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Transcript of Band Pass Filter and Band Stop Filter New

Page 1: Band Pass Filter and Band Stop Filter New

Band Pass Filter dan

Band Stop Filter

Oleh :Rachmad Nusanzali 115514039Amalia Firdha 115514040Fitriyah Dewi 115514041Agusti Randi 115514043Fulca Ugratara 115514052

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Filter frekuensi adalah sebuah rangkaian yang digunakan untuk mengalirkan frekuensi tertentu dan menghilangkan/membuang (by pass) frekuensi yang tidak diinginkan.

Filter Frekuensi

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Filter berdasarkan sifatnya

1. Filter pasif (Passive Filter) adalah Filter yang terdiri dari tahanan (resistor), lilitan (inductor), kapasitor (capacitor).

2. Filter aktif (Active Filter) adalah Filter yang terdiri dari tahanan (resistor), lilitan (inductor), kapasitor (capacitor) dan Op-Amp (Operational Amplifier)

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Filter berdasarkan Jenisnya

1. Low Pass Filter

2. High Pass Filter

3. Band Pass Filter

4. Band Stop Filter/Band Elimination

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Band Pass Filter

Berfungsi untuk meloloskan frekuensi menengah, dengan kata lain meredam frekuensi rendah (low frekuensi) dan frekuensi tinggi (high frekuensi)

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Band Pass Filter Diagram

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Cut off frekuensi

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Gambar rangkaian Band Pass filter pasif

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Hitung berapa nilai frekuensi cut off masing – masing band serta frekuensi resonansinya jika diketahui nilai diatas !

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Jawab :

= = = 1061,57 Hz

= = = 28,434 kHz

=

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Gambar rangkaian Band Pass filter aktif

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Rumus Cut Off Frekuensi , Bandwidth , frekuensi resonansi

= BW = -

= =

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Contoh Soal :

Hitung frekuensi cut off high dan low yang dihasilkan oleh filter diatas jika :

R1,2 = 15 kΩ R3 = 33 kΩ

C1 = 1,2 nF R4 = 39 kΩ

C2 = 1,5 nF C3,4 = 3,3 nF

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Jawaban :

Diket : R1 = R2 = 15 KΩ ; R3 = 33 KΩ ; R4 = 39 KΩ ; C1 = 1,2 nF; C2 = 1,5 nF; C3 = C4 = 3,3 nF ;

Ditanya : fc high dan fc low?

Jawab :

fc high = = =

= = 1,34 Hz

fc low = = =

= = 7,93 Hz

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Band Stop Filter/notch filter

Merupakan lawan dari band pass filter, yaitu membuang/membumikan frekuensi tertentu yang tidak diinginkan dan meneruskan frekuensi high dan low

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Band Stop Filter Diagram

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Band stop

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Gambar rangkaian Band stop filter pasif

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Filter low-pass disusun oleh R1,R2 dan C2 dengan konfigurasi “T” dan filter high-pass disusun oleh C1,C3 dan R3 dengan susunan “T” sehingga filter ini sering disebut dengan filter “Twin T”. Dengan menentukan nilai R1,R2 = 2*R3 dan nilai C1,C3 = 0,5*C2 maka besarnya frekuensi cutoff pada filter “Twin T”adalah.

Rumus frekuansi cut off pada filter Twin

𝑓 𝑐 = 1

4𝜋 𝑅3𝐶 2

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Tentukan frekuensi cut off, Jika diketahui :R1,2 = 22 kΩC1,2 = 9 nFR3 = 0,5*22 = 11 k ΩC3 = 2*9 = 18 nF

Contoh soal

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jawaban

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Hitung berapa nilai frekuensi cut off masing – masing band serta frekuensi resonansinya jika diketahui nilai diatas !

Soal no 1

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Soal no 2

Hitung frekuensi cut off high dan low yang dihasilkan oleh filter diatas jika :

R1 = 22 kΩ R3 = 47 kΩ

R2 = 22 kΩ R4 = 56 kΩ

C1 = 0,15 uF C3 = 1 uF

C2 = 0,22 uF C4 = 1 uF

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Tentukan frekuensi cut off, Jika diketahui :R 1,2 = 30 kΩC 1,2 = 0,33 uF

No 3