JPS5566784A - Digital stop watch - Google Patents
Digital stop watchInfo
- Publication number
- JPS5566784A JPS5566784A JP14022378A JP14022378A JPS5566784A JP S5566784 A JPS5566784 A JP S5566784A JP 14022378 A JP14022378 A JP 14022378A JP 14022378 A JP14022378 A JP 14022378A JP S5566784 A JPS5566784 A JP S5566784A
- Authority
- JP
- Japan
- Prior art keywords
- demultiplied
- outputs
- output
- circuit
- ff11w18
- 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
- Measurement Of Unknown Time Intervals (AREA)
- Electric Clocks (AREA)
Abstract
PURPOSE: To improve accuracy for measurement with a simple constitution by forming a reference signal with combining outputs from plural groups of binary storage devices being connected with quartz oscillators in a set resonance frequency.
CONSTITUTION: An output of resonance frequency 2N like 2048Hz etc. in quartz oscillator is sequently demultiplied by FF11W18 etc. forming a binary storage device in a demultiply circuit 1. When the demultiplied outputs from FF12W14 are charged into a NAND circuit 2, the circuit 2 generats a negative pulse having identical pulse width at duty of demultiplied output from FF14 with the demultiplied pulse width from FF12. In same way, the demultiplied outputs from FF15W 18 are treated in OR circuits 5 and 6 in where inverter 8, NAND gates 3 and 4, and pulse a are charged, and a reference signal having 50% duty ratio and the frequency 1000Hz for accurate stop watch is formed by combining demultiplied outputs from FF11W18 with charging outputs from the circuits 5 and 6, and the demultiplied output from FF11 into AND gate 7. With this simple constitution, it enables to improve accuracy for measurement.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14022378A JPS5566784A (en) | 1978-11-13 | 1978-11-13 | Digital stop watch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14022378A JPS5566784A (en) | 1978-11-13 | 1978-11-13 | Digital stop watch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5566784A true JPS5566784A (en) | 1980-05-20 |
Family
ID=15263763
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14022378A Pending JPS5566784A (en) | 1978-11-13 | 1978-11-13 | Digital stop watch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5566784A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4953475A (en) * | 1972-09-22 | 1974-05-24 | ||
JPS50120667A (en) * | 1974-03-07 | 1975-09-22 | ||
JPS5362571A (en) * | 1976-11-16 | 1978-06-05 | Seiko Instr & Electronics Ltd | Electronic watch with stop watch |
-
1978
- 1978-11-13 JP JP14022378A patent/JPS5566784A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4953475A (en) * | 1972-09-22 | 1974-05-24 | ||
JPS50120667A (en) * | 1974-03-07 | 1975-09-22 | ||
JPS5362571A (en) * | 1976-11-16 | 1978-06-05 | Seiko Instr & Electronics Ltd | Electronic watch with stop watch |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5698660A (en) | Frequency measuring device | |
JPS5369685A (en) | Temperature measuring apparatus | |
JPS5255361A (en) | Variable frequency oscillator | |
JPS56103540A (en) | Pll circuit | |
JPS57192876A (en) | Measuring device for average frequency | |
JPS5566784A (en) | Digital stop watch | |
JPS5749866A (en) | Analog-digital converter and digital voltmeter | |
JPS5570777A (en) | Test circuit for electronic watch | |
JPS5335466A (en) | Variable frequency oscillator circuit | |
JPS52106650A (en) | Clock pulse generating circuit | |
JPS5375456A (en) | Constant coltage power source circuit | |
JPS5337409A (en) | Vibrato device for electronic musical instrument | |
JPS5386273A (en) | Electronic timepiece | |
JPS551703A (en) | Programmable pulse generator | |
JPS51141615A (en) | Automatic tuning apparatus for electronic musical instrument | |
JPS52104973A (en) | Direct phase comparison circuit | |
JPS5576958A (en) | High frequency voltage detecting circuit | |
JPS55676A (en) | Pulse delay circuit | |
JPS5237480A (en) | Frequency detection circuit | |
JPS6462715A (en) | Power unit | |
JPS55127735A (en) | Phase synchronizing oscillator | |
JPS5576971A (en) | Electronic watch | |
JPS5373344A (en) | Stabilized power source circuit | |
JPS5520466A (en) | Digital electronic watch with multi-timer | |
JPS5373179A (en) | Comparison circuit of pulse phase |