Tugas.3 Rangkuman Materi Gerbang Logika dan Aljabar Boolean
Gerbang Logika dan Aljabar Boolean
Aljabar Boolean adalah alat yang penting dalam menggambarkan, menganalisa, merancang, dan mengimplementasikan rangkaian digital.
Konstanta Boolean dan Variabel
· Aljabar Boolean dibawah ini hanya mempunyai dua nilai : 0 dan 1
· Logika 0 dapat dikatakan : false, off, low, no, saklar terbuka.
· Logika 1 dapat dikatakan: true, on, high, yes, saklar tertutup.
· Tiga operasi logika dasar: OR, AND, dan NOT.
Tabel Kebenaran
Sebuah tabel kebenaran menggambarkan hubungan antara input dan ouput sebuah rangkaian logika. Jumlah The number of entries corresponds to the number of inputs. For example a 2 input table would have 22= 4 entries. A 3 input table would have 23= 8 entries.
Contoh tabel kebenaran dengan masukan 2, 3 dan 4 buah.
OR Operation With OR Gates
· The OR operation is similar to addition but when A = 1 and B = 1, the OR operation produces
1 + 1 = 1.
· In the Boolean expression. In the Boolean expression
x=1+1+1=1
We could say in English that x is true (1) when A is true
(1) OR B is true (1) OR C is true (1).
AND Operations with AND gates
· The Boolean expression for the AND operation is
X = A • B
· This is read as “x equals A and B.”
· x = 1 when A = 1 and B = 1.
· Truth table and circuit symbol for a two input AND gate are. Truth table and circuit symbol for a two input AND gate are shown. Notice the difference between OR and AND gates.
NOT Operation
Truth table, symbol, and
sample waveform for the NOT
circuit.
· Examples using inverters.
Evaluating Logic Circuit Output
· Rules for evaluating a Boolean expression:
· Perform all inversions of single terms.
· Perform all operations within parenthesis.
· Perform AND operation before an OR operation unless parenthesis indicate otherwise.
· If an expression has a bar over it, perform the operations inside the expression and then invert the result.
· Evaluate Boolean expressions by substituting values and performing the indicated operations :
· Output logic levels can be determined directly from a circuit diagram.
· The output of each gate is noted until a final output is found.
Ditulis Oleh : Wiar Winengsih
NIM : 1803015160
Matakuliah : Sistem Digital dan Gelombang (2F)
Sumber : https://onlinelearning.uhamka.ac.id/
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