JPS5580136A - Clock signal distribution system - Google Patents
Clock signal distribution systemInfo
- Publication number
- JPS5580136A JPS5580136A JP15514478A JP15514478A JPS5580136A JP S5580136 A JPS5580136 A JP S5580136A JP 15514478 A JP15514478 A JP 15514478A JP 15514478 A JP15514478 A JP 15514478A JP S5580136 A JPS5580136 A JP S5580136A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- pulse width
- clock signal
- fixed
- rounding
- 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
Abstract
PURPOSE: To eliminate undesired variation in pulse width by shortening a period while avoiding an influence of the rounding of a waveform, etc., in transmission, by providing a frequency multiplier circuit and chopper circuit which shorten pulse width to fixed width near a load circuit.
CONSTITUTION: On printed substrate 1, several integrated-circuit elements LSI4 are packaged and in the center, clock signal distributor 5 is provided which distributes clocks from clock generator 7 to respective circuit elements 4. Near latch circuit 11 which forms a load on circuit elements 4 receiving clock signals from distributor 5, chopper circuit 10 is provided which compresses pulse width to fixed width, and this circuit 10 is composed of a circuit of NOR gate circuits 12W14 or inverters combined and two-input NOR circuit 15 serving as a frequency multiplier circuit; and the duty ratio of a clock signal generated by generator 7 is fixed to approximate 50%, and consequently the rounding of a waveform and variation in pulse width caused by components in substrate 1 and wiring are prevented.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15514478A JPS5580136A (en) | 1978-12-14 | 1978-12-14 | Clock signal distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15514478A JPS5580136A (en) | 1978-12-14 | 1978-12-14 | Clock signal distribution system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5580136A true JPS5580136A (en) | 1980-06-17 |
Family
ID=15599494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15514478A Pending JPS5580136A (en) | 1978-12-14 | 1978-12-14 | Clock signal distribution system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5580136A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58151622A (en) * | 1982-03-05 | 1983-09-08 | Fujitsu Ltd | microprocessor |
| JPS5988738U (en) * | 1982-11-30 | 1984-06-15 | ソニー株式会社 | Microcomputer clock signal generation circuit |
| JPS63205720A (en) * | 1987-02-23 | 1988-08-25 | Hitachi Ltd | Large scale semiconductor logic circuit |
| JPH01157115A (en) * | 1987-12-14 | 1989-06-20 | Hitachi Ltd | Semiconductor integrated circuit device |
| JPH01502222A (en) * | 1987-06-30 | 1989-08-03 | ユニシス・コーポレーション | Automatic clock deskew on circuit board |
| FR2773020A1 (en) * | 1997-12-24 | 1999-06-25 | Sgs Thomson Microelectronics | CLOCK DISTRIBUTION CIRCUIT IN AN INTEGRATED CIRCUIT |
| US7471124B2 (en) | 2006-03-28 | 2008-12-30 | Fujitsu Limited | Chopper circuit that chops edge of control signal |
-
1978
- 1978-12-14 JP JP15514478A patent/JPS5580136A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58151622A (en) * | 1982-03-05 | 1983-09-08 | Fujitsu Ltd | microprocessor |
| JPH0522249B2 (en) * | 1982-03-05 | 1993-03-29 | Fujitsu Ltd | |
| JPS5988738U (en) * | 1982-11-30 | 1984-06-15 | ソニー株式会社 | Microcomputer clock signal generation circuit |
| JPS63205720A (en) * | 1987-02-23 | 1988-08-25 | Hitachi Ltd | Large scale semiconductor logic circuit |
| US4812684A (en) * | 1987-02-23 | 1989-03-14 | Hitachi, Ltd. | Multiphase clock distribution for VLSI chip |
| JPH01502222A (en) * | 1987-06-30 | 1989-08-03 | ユニシス・コーポレーション | Automatic clock deskew on circuit board |
| JPH0577087B2 (en) * | 1987-06-30 | 1993-10-26 | Unisys Corp | |
| JPH01157115A (en) * | 1987-12-14 | 1989-06-20 | Hitachi Ltd | Semiconductor integrated circuit device |
| FR2773020A1 (en) * | 1997-12-24 | 1999-06-25 | Sgs Thomson Microelectronics | CLOCK DISTRIBUTION CIRCUIT IN AN INTEGRATED CIRCUIT |
| US6252449B1 (en) | 1997-12-24 | 2001-06-26 | Stmicroelectronics S.A. | Clock distribution circuit in an integrated circuit |
| US7471124B2 (en) | 2006-03-28 | 2008-12-30 | Fujitsu Limited | Chopper circuit that chops edge of control signal |
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