JPS6424510A - Preventing circuit for malfunction of up/down counter - Google Patents
Preventing circuit for malfunction of up/down counterInfo
- Publication number
- JPS6424510A JPS6424510A JP62180449A JP18044987A JPS6424510A JP S6424510 A JPS6424510 A JP S6424510A JP 62180449 A JP62180449 A JP 62180449A JP 18044987 A JP18044987 A JP 18044987A JP S6424510 A JPS6424510 A JP S6424510A
- Authority
- JP
- Japan
- Prior art keywords
- down counter
- flip
- clock signal
- flop
- control 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.)
- Pending
Links
Landscapes
- Pulse Circuits (AREA)
Abstract
PURPOSE:To prevent an up/down counter from malfunctioning even if an asynchronous clock signal or up/down control signal is inputted by counting the outputs of two flip-flop circuits which delay the output of a 1st flip-flop circuit by a constant time and controlling the counting direction of the up/down counter. CONSTITUTION:The up/down counter inputs a clock signal to be counted by the 1st flip-flop circuit 4 to normalize the clock signal and also inputs the up/ down control signal for controlling the up/down mode of the up/down counter 7 by a 3rd flip-flop 6 to match the up/down control signal with the normalized clock signal. Then the normalized clock signal is delayed by the 2nd flip-flop circuit 5, the output of the 3rd flip-flop circuit 6 is used as the up/down control signal of the up/down counter 7, and the output of the 2nd flip-flop 5 is used as the clock signal of the up/down counter 7. Consequently, the up/down counter is prevented from malfunctioning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62180449A JPS6424510A (en) | 1987-07-20 | 1987-07-20 | Preventing circuit for malfunction of up/down counter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62180449A JPS6424510A (en) | 1987-07-20 | 1987-07-20 | Preventing circuit for malfunction of up/down counter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6424510A true JPS6424510A (en) | 1989-01-26 |
Family
ID=16083426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62180449A Pending JPS6424510A (en) | 1987-07-20 | 1987-07-20 | Preventing circuit for malfunction of up/down counter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6424510A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62106771A (en) * | 1978-07-20 | 1987-05-18 | バクスター、インターナショナル、インコーポレイテッド | Improved seal member of membrane diffusion apparatus |
-
1987
- 1987-07-20 JP JP62180449A patent/JPS6424510A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62106771A (en) * | 1978-07-20 | 1987-05-18 | バクスター、インターナショナル、インコーポレイテッド | Improved seal member of membrane diffusion apparatus |
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