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Analisis Rangkaian Elektrik - Ee-cafe.org

Analisis Rangkaian Elektrik - Ee-cafe.org

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Tabel 10.1. Pasangan transformasi Fourier.Sinyal f(t) F(ω)Impuls δ(t) 1Sinyal searah (konstan) 1 2π δ(ω)Fungsi anak tangga u(t) 1+ πδ(ω)jωSignumsgn(t)Exponensial (kausal) −αt( e ) u(t)Eksponensial (dua sisi) |e α |tEksponensial kompleks2jω1α + jω− 2α2 2α + ωj te β 2πδ(ω − β)Kosinus cosβt π [ δ( ω − β)+ δ(ω + β)]Sinus sinβt − j π [ δ( ω − β)− δ(ω + β)]Tabel 10.2. Sifat-sifat transformasi Fourier.Sifat Kawasan Waktu Kawasan FrekuensiSinyal f(t) F(ω)Kelinieran A f 1 (t) + B f 2 (t) AF 1 (ω) + BF 2 (ω)DiferensiasiIntegrasidf ( t)jωF(ω)dttF ( ω)f ( x)dx+ π F (0) δ(ω)∫ −∞jωKebalikan f (−t) F(−ω)Simetri F (t) 2π f (−ω)Pergeseran waktu f (t − T) − jωTe F (ω)Pergeseran frekuensi e j β t f (t) F(ω − β)Penskalaan |a| f (at)⎛ ω ⎞F ⎜ ⎟⎝ a ⎠216 Sudaryatno Sudirham, <strong>Analisis</strong> <strong>Rangkaian</strong> Listrik (2)

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