SG30578G - Programmable frequency divider for generating a low-frequency signal from a high-frequency signal - Google Patents
Programmable frequency divider for generating a low-frequency signal from a high-frequency signalInfo
- Publication number
- SG30578G SG30578G SG1995904603A SG1995904603A SG30578G SG 30578 G SG30578 G SG 30578G SG 1995904603 A SG1995904603 A SG 1995904603A SG 1995904603 A SG1995904603 A SG 1995904603A SG 30578 G SG30578 G SG 30578G
- Authority
- SG
- Singapore
- Prior art keywords
- divider
- ratio
- frequency signal
- flip flop
- frequency
- Prior art date
Links
Classifications
-
- 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
- H03K23/68—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two with a base which is a non-integer
-
- 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
- H03K23/667—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 by switching the base during a counting cycle
Abstract
A programmable frequency divider for integral and fractional divider ratios is described. It comprises a first divider circuit which is preset for an integral component of the divider ratio, and a second divider ratio with a flip flop which acts on the control input of the first divider circuit in the direction of changing the divider ratio. The object is to create a programmable frequency divider which, in addition to high resolution, also provides a large range of variation of the divider ratio. For this purpose, the flip flop is constructed as dynamic flip flop, the dynamic input of which is connected to the output of the second divider circuit. The output of the flip flop is connected to the control input of the first divider circuit via an adder which changes an integral part of the divider ratio and the integral part of the divider ratio is alternately increased and decreased at the ratio of the fractional component of the divider ratio.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873705629 DE3705629A1 (en) | 1987-02-21 | 1987-02-21 | PROGRAMMABLE FREQUENCY DIVIDER AND METHOD FOR GENERATING A LOW-FREQUENCY SIGNAL FROM A HIGH-FREQUENCY SIGNAL |
Publications (1)
Publication Number | Publication Date |
---|---|
SG30578G true SG30578G (en) | 1995-09-18 |
Family
ID=6321503
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SG1995904603A SG30578G (en) | 1987-02-21 | 1988-02-12 | Programmable frequency divider for generating a low-frequency signal from a high-frequency signal |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0280126B1 (en) |
AT (1) | ATE107100T1 (en) |
DE (2) | DE3705629A1 (en) |
ES (1) | ES2054714T3 (en) |
HK (1) | HK105895A (en) |
SG (1) | SG30578G (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0413868Y2 (en) * | 1988-11-29 | 1992-03-30 | ||
US4975931A (en) * | 1988-12-19 | 1990-12-04 | Hughes Aircraft Company | High speed programmable divider |
US5195111A (en) * | 1990-09-07 | 1993-03-16 | Nihon Musen Kabushiki Kaisha | Programmable frequency dividing apparatus |
DE4302438A1 (en) * | 1993-01-29 | 1994-08-04 | Blaupunkt Werke Gmbh | Circuit arrangement for frequency division by an odd number |
DE19519321C2 (en) * | 1995-05-26 | 1997-10-16 | Gerhard Kultscher Ind Elektron | Frequency divider with dual, current, decimal or hexadecimal divisor input |
US6310922B1 (en) * | 1995-12-12 | 2001-10-30 | Thomson Consumer Electronics, Inc. | Method and apparatus for generating variable rate synchronization signals |
FR2757001B1 (en) * | 1996-12-05 | 1999-02-05 | Sgs Thomson Microelectronics | DEVICE FOR CUTTING THE PERIOD OF A SIGNAL INTO N NEARLY EQUAL PARTS |
WO2002075993A2 (en) * | 2001-03-15 | 2002-09-26 | Robert Bosch Gmbh | Method and device for forming clock pulses in a bus system comprising at least one station, bus system and station |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2314612A1 (en) * | 1973-03-23 | 1974-09-26 | Muenchener Appbau Fuer Elektro | PULSE COUNTER ARRANGEMENT |
DE2654955A1 (en) * | 1976-12-03 | 1978-06-08 | Siemens Ag | Variable frequency pulse generator - has programmable frequency divider between two fixed frequency dividers |
DE2719147C2 (en) * | 1977-04-29 | 1985-01-10 | Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover | Programmable divider |
DE2727889A1 (en) * | 1977-06-21 | 1979-01-18 | Siemens Ag | Pulse train generator with programmable frequency divider system - has divider output coupled to input of logic circuit with two inputs and single output, with other input coupled to second divider output |
US4254327A (en) * | 1979-05-17 | 1981-03-03 | The United States Of America As Represented By The Secretary Of The Navy | Pulse generator having selectable pulse width and pulse repetition interval |
DE2922369A1 (en) * | 1979-06-01 | 1980-12-11 | Licentia Gmbh | Programmable pulse divider - has counter, comparator and memory and control circuit repeating given cyclic operation |
JPS56169432A (en) * | 1980-05-31 | 1981-12-26 | Toshiba Corp | Frequency dividing ratio setting circuit for programmable counter |
DE3410800A1 (en) * | 1984-03-23 | 1985-10-03 | Karl-Max 8000 München Wagner | Programmable frequency divider, particularly frequency prescaler |
FR2567697B1 (en) * | 1984-07-13 | 1991-03-29 | Servel Michel | DEVICE FOR LOCATING THE TRANSITIONS OF A DATA SIGNAL IN RELATION TO A CLOCK SIGNAL AND FRAMING MECHANISM COMPRISING SUCH A DEVICE |
DE3503182A1 (en) * | 1985-01-31 | 1986-08-07 | Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen | Programmable counter |
DE3516952A1 (en) * | 1985-05-10 | 1986-11-13 | Siemens AG, 1000 Berlin und 8000 München | Device for dividing a clock frequency in accordance with a predetermined dividing factor |
DE3521288A1 (en) * | 1985-06-13 | 1986-12-18 | Siemens AG, 1000 Berlin und 8000 München | Arrangement for digital division of an input cycle |
-
1987
- 1987-02-21 DE DE19873705629 patent/DE3705629A1/en not_active Withdrawn
-
1988
- 1988-02-12 EP EP88102048A patent/EP0280126B1/en not_active Expired - Lifetime
- 1988-02-12 AT AT88102048T patent/ATE107100T1/en not_active IP Right Cessation
- 1988-02-12 DE DE3889942T patent/DE3889942D1/en not_active Expired - Fee Related
- 1988-02-12 ES ES88102048T patent/ES2054714T3/en not_active Expired - Lifetime
- 1988-02-12 SG SG1995904603A patent/SG30578G/en unknown
-
1995
- 1995-06-29 HK HK105895A patent/HK105895A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ATE107100T1 (en) | 1994-06-15 |
DE3705629A1 (en) | 1988-09-01 |
HK105895A (en) | 1995-07-07 |
ES2054714T3 (en) | 1994-08-16 |
EP0280126A2 (en) | 1988-08-31 |
DE3889942D1 (en) | 1994-07-14 |
EP0280126B1 (en) | 1994-06-08 |
EP0280126A3 (en) | 1990-03-07 |
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