The 4-line-to 10 line decoder and the 1-of -10 decoder are two different types

The decoder of the block transform coding system includes the inverse quantization.

When a digital signal is transmitted in an analog transmission system, what are required at the transmitting and the receiving ends respectively? A: Modulator and Demodulator B: Demodulator and Modulator C: Encoder and decoder D: Decoder and encoder

以下标识符中,哪个是不合法的标识符( )。 A: Decoder_1 B: 4h_adde C: entity2 D: a_in_2

（） is the method used to deliver a message. A: Channel B: Sender C: Receiver D: Decoder

The 74138 decoder can also be used as ( ). A: an encoder B: a DEMUX C: a MUX D: none of the above

Which example is phychological noise? A: Speaking grammar that the decoder cannot understand. B: Nervousness about a public speech. C: A serious cold. D: A person speaking over the phone loudly.

某一逻辑电路的状态图如右所示，则此电路为？（） A: 2-bit移位器（shifter） B: 2-bit计数器（counter） C: 2-bit多工器（multiplexer） D: 2-bit译码器（decoder）

A BCD-to-7 segment decoder has 0100 on its inputs. The active outputs are (______). 0100是七段显示译码器的输入，则输出端为有效电平的是(______)。http://edu-image.nosdn.127.net/217FF551D935D8FE380EED80DD6A6137.jpg?imageView&thumbnail=890x0&quality=100

A 7-segment decoder drive the display in the figure. If the waveforms are applied as indicated, determine the sequence of digits that appears on the display.七段显示译码器如图驱动一个数码管。按照给定的波形输入，数码管上显示的数字序列为：http://edu-image.nosdn.127.net/1A8E664B8EA87EFB0E25183EB1226819.jpg?imageView&thumbnail=890x0&quality=100