GB1416941A - Electronic reference isochronous period generator and applications - Google Patents
Electronic reference isochronous period generator and applicationsInfo
- Publication number
- GB1416941A GB1416941A GB3959573A GB3959573A GB1416941A GB 1416941 A GB1416941 A GB 1416941A GB 3959573 A GB3959573 A GB 3959573A GB 3959573 A GB3959573 A GB 3959573A GB 1416941 A GB1416941 A GB 1416941A
- Authority
- GB
- United Kingdom
- Prior art keywords
- counter
- circuit
- period
- reset
- output
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/60—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers
- G06F7/68—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers using pulse rate multipliers or dividers pulse rate multipliers or dividers per se
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G3/00—Producing timing pulses
- G04G3/02—Circuits for deriving low frequency timing pulses from pulses of higher frequency
- G04G3/022—Circuits for deriving low frequency timing pulses from pulses of higher frequency the desired number of pulses per unit of time being obtained by adding to or substracting from a pulse train one or more pulses
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K23/00—Pulse counters comprising counting chains; Frequency dividers comprising counting chains
- H03K23/64—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two
- H03K23/66—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two with a variable counting base, e.g. by presetting or by adding or suppressing pulses
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- Computing Systems (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Electric Clocks (AREA)
- Electromechanical Clocks (AREA)
- Manipulation Of Pulses (AREA)
- Measurement Of Unknown Time Intervals (AREA)
Abstract
1416941 Frequency dividers; electronic time pieces DYNACORE SA 15 Aug 1973 [24 Aug 1972] 39595/73 Heading G4D [Also in Division G3] A generator for providing isochronous pulses, such as for driving a clock, watch, computer &c., comprises a high frequency oscillator 1 feeding a counter 4 which is reset to zero each time it reaches a predetermined count stored in a programming device 5 which has means for receiving a standard reference period and redetermining the predetermined count in accordance with the period. Normally the counter 4 counts from the oscillator 1 through a selector circuit 2; its parallel outputs sbm are compared with a predetermined value in a memory 6 by a coincidence circuit 8 which delivers an output pulse at SS and resets the counter via a reset circuit 11. The output may for instance be at one pulse per second to control the balance wheel or tuning fork of a watch or a stepping motor of a clock. The reference period is determined by two spaced pulses applied at ER. These may be derived from a flashing light or magnetically, requiring no connections, if the generator is in a watch. The application of the first pulse causes the counter to be reset to zero via the reset circuit 11; a gate circuit 7 to be enabled so that the memory follows the output sbm of the counter; the output SS to be inhibited by a circuit 9 and the input selector circuit 2 to be changed over so that the counter now counts at a reduced rate (e.g. <SP>1</SP>/ 10 ) via a divider 3. The application of the second pulse then restores all the circuits; thus the memory which now contains a count equal to the reference period is disconnected from the counter by gates 7 and normal counting continues. The ratio of the output period at SS to the standard period may be varied by altering the division ratio of divider 3; a circuit p may be included to do this according to a coded signal applied to ER. In an alternative arrangement (Fig. 1B, not shown) the counter may be reset to the value in the memory and then count down to zero; the coincidence circuit 8 can then be replaced by a simpler null detector; when redetermining the period the counting direction is changed and the counter counts up as above.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1257072A CH610473B5 (en) | 1972-08-24 | 1972-08-24 | Generator of isochronous reference periods which can be used for measuring time and can be readjusted, and use of this generator |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1416941A true GB1416941A (en) | 1975-12-10 |
Family
ID=4384263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3959573A Expired GB1416941A (en) | 1972-08-24 | 1973-08-15 | Electronic reference isochronous period generator and applications |
Country Status (4)
Country | Link |
---|---|
CH (2) | CH610473B5 (en) |
FR (1) | FR2197265B1 (en) |
GB (1) | GB1416941A (en) |
HK (1) | HK62476A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4187518A (en) | 1977-02-21 | 1980-02-05 | Centre Electronique Horloger Sa | Timing device |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH643106B (en) * | 1980-11-26 | Suisse Horlogerie | TIME-GUARD INCLUDING A CHAIN OF DIVIDERS WITH ADJUSTABLE DIVISION RATIO. | |
CH664868GA3 (en) * | 1986-07-10 | 1988-04-15 | ||
FR2629608B1 (en) * | 1988-03-31 | 1992-01-10 | Peugeot | METHOD AND DEVICE FOR RECEIVING SYNCHRONIZATION OF A LOCAL CLOCK OF A STATION OF A COMMUNICATION NETWORK, IN PARTICULAR OF A MOTOR VEHICLE |
EP2738629A1 (en) * | 2012-11-30 | 2014-06-04 | EM Microelectronic-Marin SA | High-precision electronic clock movement and method for adjusting a time base |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH223066A (en) * | 1939-10-30 | 1942-08-31 | Ig Farbenindustrie Ag | Method of making a linear polyester. |
FR1448920A (en) * | 1965-06-28 | 1966-08-12 | Csf | Pulse counters |
US3364439A (en) * | 1966-10-07 | 1968-01-16 | Tele Signal Corp | Frequency corrected digital clock with memory in phase control loop |
BE789976A (en) * | 1971-10-15 | 1973-02-01 | Centre Electron Horloger | TIME-GUARD |
-
1972
- 1972-08-24 CH CH1257072A patent/CH610473B5/en not_active IP Right Cessation
-
1973
- 1973-08-15 GB GB3959573A patent/GB1416941A/en not_active Expired
- 1973-08-23 FR FR7330530A patent/FR2197265B1/fr not_active Expired
-
1976
- 1976-07-28 CH CH964276A patent/CH619106B5/en unknown
- 1976-10-07 HK HK62476A patent/HK62476A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4187518A (en) | 1977-02-21 | 1980-02-05 | Centre Electronique Horloger Sa | Timing device |
Also Published As
Publication number | Publication date |
---|---|
CH619106B5 (en) | 1982-11-30 |
FR2197265A1 (en) | 1974-03-22 |
HK62476A (en) | 1976-10-15 |
CH1257072A4 (en) | 1976-04-30 |
CH610473B5 (en) | 1979-04-30 |
DE2342701B2 (en) | 1977-03-17 |
FR2197265B1 (en) | 1977-09-09 |
CH619106GA3 (en) | 1980-09-15 |
DE2342701A1 (en) | 1974-03-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
746 | Register noted 'licences of right' (sect. 46/1977) | ||
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |