PRAKTIK ELEKTRONIKA LEMBAR JAWAB 5
Topik 5. Op-Amp Sebagai Pembangkit Gelombang
Nama
NIM
: ……………………………………….
: ……………………………………….
A. Gambar Rangkaian
R=4K7-10K
+15V
2
7
A
3
C=0,022-0,22uF
B
8
7
6
5
6
C
4
-15V
100K
82K
4K7
1
2
3
4
IC Tampak Atas
B. Petunjuk
1. Pastikan kaki-kaki IC terhubung dengan benar, karena dapat menyebabkan IC terbakar dan Anda
diminta menggantinya.
2. Prosentase perbedaan hasil teori dan praktek = (|Teori – Praktek|/Teori) x 100%
C.
Pertanyaan
1. Ceritakan, mengapa bentuk gelombang pada titik A, B, dan C bisa seperti itu ?
2. Hitung frekuensi gelombangnya ?
3. Hitung prosentase perbedaan antara frekuensi teori dan frekuensi praktek ?
4. Hitung prosentase perbedaan antara tegangan teori dan tegangan praktek baik di titik A, B, dan C ?
D. Langkah Kerja
1. Rakitlah rangkaian diatas dengan R dan C yang dapat dipilih dalam rentang sesuai dengan yang
ditentukan dalam gambar.
R = 4K7 s/d 10K
C = 0,022 s/d 0,22 uF
2. Hidupkan catu daya, pasang dan hidupkan osiloskop, atur selektor switch pada 5 V/DIV.
3. Ukur tegangan di titik A, B, dan C !
4. Ukur frekuensi yang dibangkitkan !
5. Gambarkan bentuk gelombang yang didapatkan di titik A, B, dan C dalam satu skala waktu (gunakan
warna bolpoin yang berbeda) !
6. Masukkan hasil pengukuran pada tabel yang disediakan !
Didik Hariyanto – Praktik Elektronika
Gambar Sinyal Pada CRO (Titik A, B, dan C) :
Hasil Pengukuran di Titik A :
……………………………………………………………
……………………………………………………………
……………………………………………………………
Hasil Pengukuran di Titik B :
……………………………………………………………
……………………………………………………………
……………………………………………………………
Hasil Pengukuran di Titik C :
……………………………………………………………
……………………………………………………………
……………………………………………………………
Frekuensi yang terukur :
……………………………………………………………
……………………………………………………………
……………………………………………………………
E.
Jawaban Pertanyaan
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Didik Hariyanto – Praktik Elektronika
Nama
NIM
: ……………………………………….
: ……………………………………….
A. Gambar Rangkaian
R=4K7-10K
+15V
2
7
A
3
C=0,022-0,22uF
B
8
7
6
5
6
C
4
-15V
100K
82K
4K7
1
2
3
4
IC Tampak Atas
B. Petunjuk
1. Pastikan kaki-kaki IC terhubung dengan benar, karena dapat menyebabkan IC terbakar dan Anda
diminta menggantinya.
2. Prosentase perbedaan hasil teori dan praktek = (|Teori – Praktek|/Teori) x 100%
C.
Pertanyaan
1. Ceritakan, mengapa bentuk gelombang pada titik A, B, dan C bisa seperti itu ?
2. Hitung frekuensi gelombangnya ?
3. Hitung prosentase perbedaan antara frekuensi teori dan frekuensi praktek ?
4. Hitung prosentase perbedaan antara tegangan teori dan tegangan praktek baik di titik A, B, dan C ?
D. Langkah Kerja
1. Rakitlah rangkaian diatas dengan R dan C yang dapat dipilih dalam rentang sesuai dengan yang
ditentukan dalam gambar.
R = 4K7 s/d 10K
C = 0,022 s/d 0,22 uF
2. Hidupkan catu daya, pasang dan hidupkan osiloskop, atur selektor switch pada 5 V/DIV.
3. Ukur tegangan di titik A, B, dan C !
4. Ukur frekuensi yang dibangkitkan !
5. Gambarkan bentuk gelombang yang didapatkan di titik A, B, dan C dalam satu skala waktu (gunakan
warna bolpoin yang berbeda) !
6. Masukkan hasil pengukuran pada tabel yang disediakan !
Didik Hariyanto – Praktik Elektronika
Gambar Sinyal Pada CRO (Titik A, B, dan C) :
Hasil Pengukuran di Titik A :
……………………………………………………………
……………………………………………………………
……………………………………………………………
Hasil Pengukuran di Titik B :
……………………………………………………………
……………………………………………………………
……………………………………………………………
Hasil Pengukuran di Titik C :
……………………………………………………………
……………………………………………………………
……………………………………………………………
Frekuensi yang terukur :
……………………………………………………………
……………………………………………………………
……………………………………………………………
E.
Jawaban Pertanyaan
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Didik Hariyanto – Praktik Elektronika