GB1416941A - Electronic reference isochronous period generator and applications - Google Patents

Electronic reference isochronous period generator and applications

Info

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
Application number
GB3959573A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DYNACORE SA
Original Assignee
DYNACORE SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4384263&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=GB1416941(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by DYNACORE SA filed Critical DYNACORE SA
Publication of GB1416941A publication Critical patent/GB1416941A/en
Expired legal-status Critical Current

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

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.
GB3959573A 1972-08-24 1973-08-15 Electronic reference isochronous period generator and applications Expired GB1416941A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH227070A (en) * 1939-10-30 1943-05-15 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

Cited By (1)

* Cited by examiner, † Cited by third party
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
FR2197265B1 (en) 1977-09-09
CH619106B5 (en) 1982-11-30
FR2197265A1 (en) 1974-03-22
DE2342701A1 (en) 1974-03-14
CH1257072A4 (en) 1976-04-30
HK62476A (en) 1976-10-15
CH610473B5 (en) 1979-04-30
CH619106GA3 (en) 1980-09-15
DE2342701B2 (en) 1977-03-17

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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