Decoder
a decoder is a combinatorial circuit, that from n entrances 2^n (or less) min and/or. Max terms, depending upon realization, produces. Each function can be expressed by these terms and therefore is suitable the decoder to realize arbitrary switching function as the arising terms are linked at the output. The binary circuit to the decoder is the Encoder.
Decoders are components of READ Only Memorys.
example
- of entrances: s0, s1, s2
- Ausgänge: Min terms m0, m1,…, m7
s2 s1 s0 m0 m1 m2 m3 m4 m5 m6 m7 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 1 1 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 1 0 1 0 0 0 0 0 1 0 0 1 1 0 0 0 0 0 0 0 1 0 1 1 1 0 0 0 0 0 0 0 1
1 from n decoder
the 1 from n decoder switches exactly one of n exits on 1, whereby n is a power of 2, since n in binary notation must rest against the entrances. With the entrances e0, e1, e2, e3 with 0 1 1 0 is = 6 December became the exit y6 = 1 and all other y0, y1,…, y5, y7, y8,… y15 = 0.
By 1 from n decoders for example the individual Filp flops in a memory selected in to be written is, as the address is put to the entrances of the 1 from n decoder and the exits y0,…, yn and the flip-flop of entrances f0,…, fn with a AND to be interconnected.
| This article or section is still incomplete and exhibits the following gaps : To purchase to the Encodieren/decoding in software, see Encoder, codec |
