JPS55154633A - Comparison circuit - Google Patents
Comparison circuitInfo
- Publication number
- JPS55154633A JPS55154633A JP6302879A JP6302879A JPS55154633A JP S55154633 A JPS55154633 A JP S55154633A JP 6302879 A JP6302879 A JP 6302879A JP 6302879 A JP6302879 A JP 6302879A JP S55154633 A JPS55154633 A JP S55154633A
- Authority
- JP
- Japan
- Prior art keywords
- output
- exclusive logical
- objective
- circuit
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Test And Diagnosis Of Digital Computers (AREA)
Abstract
PURPOSE: To enable to diagnose independently of the number of input bits of compared objective, by taking a pair of exclusive logical sums between the compared instruction signal and the compared objective signal, delivering them, and detecting a fixed fault through the output at the final stage.
CONSTITUTION: With diagnostic state, an external signal 6 is made to "1", and each comparison instruction signal ii (where; i=1...n) and a comparison objective signal 2i are kept the same value, then the output of an exclusive logical sum circuit 31 is at "1", this is delivered to make the output of an exclusive logical sum circuit 32 to "1" and further the output of an exclusive logical sum circuit 33 to "1". Thus, the output of "1" is propagated to the final state, circuit 3n, and all the output of exclusive logical sums are at "1". If any one in the circuit 3j has a fixed failure of "0", the output of the final stage 3n is at "0" to enable the detection of the fixed failure. Thus, diagnosis can be made independently of the number of input bits of comparison objective.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6302879A JPS55154633A (en) | 1979-05-22 | 1979-05-22 | Comparison circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6302879A JPS55154633A (en) | 1979-05-22 | 1979-05-22 | Comparison circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55154633A true JPS55154633A (en) | 1980-12-02 |
JPS6112576B2 JPS6112576B2 (en) | 1986-04-09 |
Family
ID=13217457
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6302879A Granted JPS55154633A (en) | 1979-05-22 | 1979-05-22 | Comparison circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55154633A (en) |
-
1979
- 1979-05-22 JP JP6302879A patent/JPS55154633A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6112576B2 (en) | 1986-04-09 |
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