JPS5480641A - Test unit for logic circuit - Google Patents
Test unit for logic circuitInfo
- Publication number
- JPS5480641A JPS5480641A JP14812177A JP14812177A JPS5480641A JP S5480641 A JPS5480641 A JP S5480641A JP 14812177 A JP14812177 A JP 14812177A JP 14812177 A JP14812177 A JP 14812177A JP S5480641 A JPS5480641 A JP S5480641A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- comparator
- gate
- logic circuit
- 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.)
- Pending
Links
Landscapes
- Test And Diagnosis Of Digital Computers (AREA)
Abstract
PURPOSE: To confirm the state of high impedance for the tested circuit, by causing the logic signal of "0" and "1" from the tristate gate and detecting the tested circuit via the comparator and the coincidence circuit.
CONSTITUTION: The output of the tristate gate 8 is connected in wired-OR connection with the tested circuit 1 via the resistor 9, this is connected to the input of the comparator 2, and the output of the comparator 2 and the output of the gate 8 are collated in the coincidence circuit 11. In this case, the output of the circuit 1 causes the logic signal of "0" and "1" from the gate 8 in time when the output is high impedance, and this signal is detected via the comparator 2 and the coincidence circuit 11, allowing to confirm the state of the output high impedance state of the circuit 1.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14812177A JPS5480641A (en) | 1977-12-12 | 1977-12-12 | Test unit for logic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14812177A JPS5480641A (en) | 1977-12-12 | 1977-12-12 | Test unit for logic circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5480641A true JPS5480641A (en) | 1979-06-27 |
Family
ID=15445719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14812177A Pending JPS5480641A (en) | 1977-12-12 | 1977-12-12 | Test unit for logic circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5480641A (en) |
-
1977
- 1977-12-12 JP JP14812177A patent/JPS5480641A/en active Pending
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