福师《数字逻辑》在线作业一（Fu Shi digital logic online homework one）.doc

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福师《数字逻辑》在线作业一（Fu Shi digital logic online homework one）.doc

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福师《数字逻辑》在线作业一（Fu Shi digital logic online homework one）

福师《数字逻辑》在线作业一（Fu Shi digital logic online homework one） Fu Shi digital logic online homework one I. radio questions 1. to work in the transition region of TTL NAND gate, the input resistor (RI) on the outside. A. RON B. ROFF C., ROFF RI RON D. ROFF The correct answer: C 2. if there are 50 coded objects in the encoder, the output binary code is required to be the bit () bit A. 5 B. 6 C. 10 D. 50 The correct answer: B 3. of the following circuits are often used in bus applications A. TSL gate B. OC gate C. open drain gate D. CMOS NAND gate The correct answer: A 4. a unsigned 10 bit digital input DAC whose output level is a series of A. 4 B. 10 C. 1024 D. 1023 The correct answer: C 5. in the following logical circuits, not the combinational logic circuits have () A. decoder B. encoder C. full adder D. register The correct answer: D 6. 74LS160 decimal counter, which contains the number of triggers is () A. 1 B. 2 C. 4 D. 6 The correct answer: C 7. compared with analog circuits, digital circuits do not include the main advantages A. is easy to design B. versatility C. good confidentiality D. strong anti-interference ability The correct answer: A 8. in the following expression, the logical algorithm is () A., C, C=C2 B. 1+1=10 C. 0 1 D. A+1=1 The correct answer: D 9. in a 8 bit memory cell, the largest unsigned integer that can be stored is () A. (256) 10 B. (127) 10 C. (FE) 16 D. (255) 10 The correct answer: D 10. MOS integrated circuit adopts () control, and its power loss is relatively small A. voltage B. current C. perfusion current D. pull current The correct answer: A 11. CMOS digital integrated circuits, compared with TTL digital integrated circuits, do not have the advantage of () A. micropower B. high speed C. high anti-interference capability D. wide power range The correct answer: B 12. an unsigned 8 bit digital input DAC with a resolution of () bits A. 1 B. 3 C. 4 D. 8 The correct answer: D 13. the number or code equivalent to the decimal number (53.5) 10