74LS138实现全减器
1、 电路图：
真值表：
输入 | 输出 | |||
A | B | C | V | F |
0 | 0 | 0 | 0 | 0 |
0 | 0 | 1 | 1 | 1 |
0 | 1 | 0 | 1 | 1 |
0 | 1 | 1 | 1 | 0 |
1 | 0 | 0 | 0 | 1 |
1 | 0 | 1 | 0 | 0 |
1 | 1 | 0 | 0 | 0 |
1 | 1 | 1 | 1 | 1 |
![](https://wkrtcs.bdimg.com/rtcs/image?w=14.67&md5sum=581862c16005cf2382d8d85bf6574009&sign=574dd6d68c&rtcs_flag=2&rtcs_ver=3.1&l=webapp&bucketNum=72&ipr={"t":"img","w":"14.67","h":"14.67","dataType":"gif","c":"word/media/image2.gif"})
的逻辑表达式：
![](https://wkrtcs.bdimg.com/rtcs/image?w=100.00&md5sum=581862c16005cf2382d8d85bf6574009&sign=574dd6d68c&rtcs_flag=2&rtcs_ver=3.1&l=webapp&bucketNum=72&ipr={"t":"img","w":"100.00","h":"17.33","dataType":"gif","c":"word/media/image3.gif"})
V的逻辑表达式：
![](https://wkrtcs.bdimg.com/rtcs/image?w=129.33&md5sum=581862c16005cf2382d8d85bf6574009&sign=574dd6d68c&rtcs_flag=2&rtcs_ver=3.1&l=webapp&bucketNum=72&ipr={"t":"img","w":"129.33","h":"24.00","dataType":"gif","c":"word/media/image4.gif"})
![](https://wkrtcs.bdimg.com/rtcs/image?w=245.33&md5sum=581862c16005cf2382d8d85bf6574009&sign=574dd6d68c&rtcs_flag=2&rtcs_ver=3.1&l=webapp&bucketNum=72&ipr={"t":"img","w":"245.33","h":"168.00","dataType":"gif","c":"word/media/image5.gif"})
其中
![](https://wkrtcs.bdimg.com/rtcs/image?w=396.00&md5sum=581862c16005cf2382d8d85bf6574009&sign=574dd6d68c&rtcs_flag=2&rtcs_ver=3.1&l=webapp&bucketNum=72&ipr={"t":"img","w":"396.00","h":"24.00","dataType":"gif","c":"word/media/image6.gif"})
![](https://wkrtcs.bdimg.com/rtcs/image?w=396.00&md5sum=581862c16005cf2382d8d85bf6574009&sign=574dd6d68c&rtcs_flag=2&rtcs_ver=3.1&l=webapp&bucketNum=72&ipr={"t":"img","w":"396.00","h":"24.00","dataType":"gif","c":"word/media/image7.gif"})
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文档为doc格式
![](https://wkrtcs.bdimg.com/rtcs/image?w=434.67&md5sum=581862c16005cf2382d8d85bf6574009&sign=574dd6d68c&rtcs_flag=2&rtcs_ver=3.1&l=webapp&bucketNum=72&ipr={"t":"img","r":"r_5","w":"434.67","h":"168.00","dataType":"emf","c":"word/media/image1.emf"})