试分析如图所示电路的逻辑功能。

A . “与”非门 B . “导或”门 C . “与或非”门

A . 可控RS触发器 B . JK触发器 C . 基本RS触发器 D . T触发器

A .https://assets.asklib.com/psource/2015110110334621588.jpg B .https://assets.asklib.com/psource/2015110110340299751.jpg C .https://assets.asklib.com/psource/201511011034175015.jpg D .https://assets.asklib.com/psource/2015110110343034391.jpg

A .https://assets.asklib.com/psource/2015110110064980810.jpg B .https://assets.asklib.com/psource/201511011007091323.jpg C .https://assets.asklib.com/psource/2015110110072370179.jpg D .https://assets.asklib.com/psource/2015110110073874078.jpg

<img src='https://img2.soutiyun.com/ask/2019-12-02/944168748704533.png' />

TTL逻辑电路组成的同步时序电路如图11-66所示。(1)试分析图中虚线框内电路，画出Q1、Q2、Q3波形，并说明虚线框内电路的逻辑功能。(2)若把电路中的Z输出和各触发器的置零端CR连接在一起，试说叨当X1X2X3为110时，整个电路的逻辑功能是什么？ <img src='https://img2.soutiyun.com/ask/2020-07-22/964284879679792.png' />

<img src='https://img2.soutiyun.com/ask/2020-09-14/968968315891434.png' />

<img src='https://img2.soutiyun.com/ask/2020-09-06/968245330599443.png' />

<img src='https://img2.soutiyun.com/ask/2020-08-19/966717018572918.png' />

由JK触发器和PLA构成的时序逻辑电路如图所示，试分析其功能(写出驱动方程和状态方程，画出状态转换图，说明电路的逻辑功能，电路能否自启动)。<img src='https://img2.soutiyun.com/ask/uploadfile/5478001-5481000/f152390292d2c215d853de1858c0ae2b.png' />

试分析图L4-9(a)所示由串行进位加法器74LS183所构成的逻辑电路的功能。 <img src='https://img2.soutiyun.com/ask/uploadfile/5475001-5478000/68414a05c71b02532fe4876ae3d04c86.png' />

<img src='https://img2.soutiyun.com/ask/2021-01-03/978535859454794.png' />

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<img src='https://img2.soutiyun.com/ask/2019-05-13/926632091552615.png' />

由负边沿JK，触发器F1和F0组成的时序逻辑电路如图4.21(a)(教材图4.18)所示。试求:(1)写出电路的输出方程、驱动方程和状态方程;(2)列出A=1时的状态转换表,画出波形图(画4个CP);(3)若A=0,则电路的工作情况如何？ <img src='https://img2.soutiyun.com/ask/2020-07-10/963247479671612.png' /> <img src='https://img2.soutiyun.com/ask/2020-07-10/96324749257235.png' />

<img src='https://img2.soutiyun.com/ask/2020-08-19/966716598259878.png' />

1、74LS138的作用是什么？ 2、74LS138在什么条件下才工作？ 3、RAM的地址范围是多少？ <img src='https://img2.soutiyun.com/shangxueba/ask/19143001-19146000/19143786/2015061315042538154.jpg' />

<img src='https://img2.soutiyun.com/ask/2020-12-25/977735000278167.png' />

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<img src='https://img2.soutiyun.com/ask/2021-01-22/980192802617851.png' />