IT1251549B - Apparecchio divisore di frequenza programmabile - Google Patents
Apparecchio divisore di frequenza programmabileInfo
- Publication number
- IT1251549B IT1251549B ITMI912350A ITMI912350A IT1251549B IT 1251549 B IT1251549 B IT 1251549B IT MI912350 A ITMI912350 A IT MI912350A IT MI912350 A ITMI912350 A IT MI912350A IT 1251549 B IT1251549 B IT 1251549B
- Authority
- IT
- Italy
- Prior art keywords
- frequency divider
- programmable frequency
- stage
- programmable
- division
- 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
- H03K23/66—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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K21/00—Details of pulse counters or frequency dividers
-
- 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
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
Una rete di divisione di frequenza programmabile comprende una pluralità di stadi divisori di frequenza programmabili collegati in cascata, ciascuno dei quali divide la frequenza di un impulso orologio per due e tre sulla base di un livello logico di un segnale di ingresso prestabilito usato per variare un rapporto di divisione variabile l'uno dall'altro. Inoltre viene previsto un mezzo di abilitazione per determinare o rilevare se ciascuna delle uscite degli stadi divisori di frequenza programmabili della rete di divisione di frequenza programmabile dopo uno stadio divisore di frequenza programmabile come secondo stadio viene portato ad una configurazione predeterminata ed un segnale di istruzioni per prendere una decisione per quanto riguarda la divisione del rapporto di divisione per più uno viene introdotta in modo da generare l'uscita ad un livello logico per far sì che uno stadio divisore di frequenza programmabile equivalente ad un primo stadio divida la frequenza dell'impulso orologio per tre se si è determinato che è positivo nel processo di rilevamento suddetto. Quindi l'uscita del mezzo di abilitazione viene fornita allo stadio divisore di frequenza programmabile corrispondente al primo stadio nella rete di divisione di frequenza programmabile in modo da selezionare l'uno a l'altro dei rapporti di divisione di n e (n+1) rispetto ad un apparecchio divisore di frequenza programmabile comprendente la suddetta rete e il mezzo di abilitazione.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23738790A JP2572302B2 (ja) | 1990-09-07 | 1990-09-07 | 可変分周装置 |
JP23738690A JPH0783257B2 (ja) | 1990-09-07 | 1990-09-07 | 可変分周装置 |
Publications (3)
Publication Number | Publication Date |
---|---|
ITMI912350A0 ITMI912350A0 (it) | 1991-09-04 |
ITMI912350A1 ITMI912350A1 (it) | 1993-03-04 |
IT1251549B true IT1251549B (it) | 1995-05-17 |
Family
ID=26533187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ITMI912350A IT1251549B (it) | 1990-09-07 | 1991-09-04 | Apparecchio divisore di frequenza programmabile |
Country Status (9)
Country | Link |
---|---|
US (1) | US5195111A (it) |
KR (1) | KR950003018B1 (it) |
CA (1) | CA2049225C (it) |
DE (1) | DE4129657C2 (it) |
ES (1) | ES2038075B1 (it) |
FR (1) | FR2666707B1 (it) |
GB (1) | GB2248708B (it) |
IT (1) | IT1251549B (it) |
SE (1) | SE513521C2 (it) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0579324B1 (en) * | 1992-07-17 | 1998-12-30 | Koninklijke Philips Electronics N.V. | Microprocessor with registered clock counting for at a predetermined count producing a command signal of adjustable shape, and a hierarchical interrupt system for use therewith |
EP0602422A1 (en) * | 1992-12-15 | 1994-06-22 | International Business Machines Corporation | Dynamic frequency shifting with divide by one clock generators |
DE4308979A1 (de) * | 1993-03-20 | 1994-09-22 | Philips Patentverwaltung | Zähler- und/oder Teileranordnung |
FR2719728A1 (fr) * | 1994-05-04 | 1995-11-10 | Philips Composants | Diviseur de fréquence, synthétiseur de fréquence comportant un tel diviseur et radiotéléphone comportant un tel synthétiseur. |
DE19729476C2 (de) * | 1997-07-10 | 2000-04-27 | Nokia Networks Oy | Numerisch gesteuerter Oszillator |
US5948046A (en) * | 1997-12-15 | 1999-09-07 | Telefonaktiebolaget Lm Ericsson | Multi-divide frequency division |
US6157693A (en) * | 1998-09-30 | 2000-12-05 | Conexant Systems, Inc. | Low voltage dual-modulus prescaler circuit using merged pseudo-differential logic |
WO2002093747A2 (en) * | 2001-05-17 | 2002-11-21 | Koninklijke Philips Electronics N.V. | Improved frequency divider with reduced jitter and apparatus based thereon |
WO2003019781A2 (en) * | 2001-08-29 | 2003-03-06 | Koninklijke Philips Electronics N.V. | Improved frequency divider with reduced jitter and transmitter based thereon |
US6950958B2 (en) * | 2001-10-15 | 2005-09-27 | Intel Corporation | Method and apparatus for dividing a high-frequency clock signal and further dividing the divided high-frequency clock signal in accordance with a data input |
DE10251703B4 (de) | 2002-11-06 | 2005-08-04 | Infineon Technologies Ag | Schaltungsanordnung zur Frequenzteilung und Phasenregelschleife mit der Schaltungsanordnung |
DE102004010405B4 (de) * | 2004-03-01 | 2006-01-12 | Infineon Technologies Ag | Frequenzteilerschaltung mit steuerbarem Frequenzteilerverhältnis und Verfahren zur Frequenzteilung in einer Frequenzteilerschaltung |
JP2007529179A (ja) * | 2004-03-12 | 2007-10-18 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 周波数分割器を有する装置 |
US7119587B2 (en) * | 2004-05-20 | 2006-10-10 | International Business Machines Corporation | High frequency divider state correction circuit |
US7196558B2 (en) * | 2005-03-10 | 2007-03-27 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Frequency divider with slip |
DE102006018347A1 (de) * | 2006-04-19 | 2007-10-25 | Schwechten, Dieter, Dr. | Vorrichtung für die Sammlung pyrogener Stäube |
US7924069B2 (en) * | 2006-06-28 | 2011-04-12 | Qualcomm Incorporated | Multi-modulus divider retiming circuit |
US8565368B1 (en) * | 2012-05-25 | 2013-10-22 | Micrel, Inc. | Wide range multi-modulus divider in fractional-N frequency synthesizer |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3202837A (en) * | 1962-09-05 | 1965-08-24 | Diamond Power Speciality | Frequency divider employing receptacles having preset frequency ratio connections for standard frequency plug-in units |
US4053739A (en) * | 1976-08-11 | 1977-10-11 | Motorola, Inc. | Dual modulus programmable counter |
DE2644270B2 (de) * | 1976-09-30 | 1979-09-13 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Taktsteuerbare Impulszähleinrichtung mit wählbarem Teilerverhältnis |
JPS5673907A (en) * | 1979-11-21 | 1981-06-19 | Hitachi Ltd | Frequency divider |
JPS5718129A (en) * | 1980-07-07 | 1982-01-29 | Nec Corp | Pulse swallow frequency divider |
GB2089539B (en) * | 1980-12-08 | 1984-08-01 | Plessey Co Ltd | Adjustable ratio divider |
US4575867A (en) * | 1982-08-09 | 1986-03-11 | Rockwell International Corporation | High speed programmable prescaler |
JPS59181831A (ja) * | 1983-03-31 | 1984-10-16 | Toshiba Corp | 可変分周器 |
JPS60136422A (ja) * | 1983-12-26 | 1985-07-19 | Hitachi Ltd | プリスケラ |
JPS61280121A (ja) * | 1985-06-05 | 1986-12-10 | Oki Electric Ind Co Ltd | 2モジユラスプリスケ−ラ |
US4715052A (en) * | 1986-03-10 | 1987-12-22 | Texas Instruments Incorporated | Frequency divide by N circuit |
US4703495A (en) * | 1986-05-23 | 1987-10-27 | Advanced Micro Device, Inc. | High speed frequency divide-by-5 circuit |
DE3705629A1 (de) * | 1987-02-21 | 1988-09-01 | Thomson Brandt Gmbh | Programmierbarer frequenzteiler sowie verfahren zur erzeugung eines niederfrequenten signals aus einem hochfrequenten signal |
US4975931A (en) * | 1988-12-19 | 1990-12-04 | Hughes Aircraft Company | High speed programmable divider |
JP3003078B2 (ja) * | 1989-10-16 | 2000-01-24 | 日本無線株式会社 | 分周比の切換え可能な分周回路 |
JP2572283B2 (ja) * | 1989-10-23 | 1997-01-16 | 日本無線株式会社 | 可変分周回路 |
GB2237434A (en) * | 1990-09-12 | 1991-05-01 | Brendan Roberts | Intruder alarm external sounder housing |
-
1991
- 1991-08-13 US US07/744,448 patent/US5195111A/en not_active Expired - Fee Related
- 1991-08-14 GB GB9117506A patent/GB2248708B/en not_active Expired - Fee Related
- 1991-08-15 SE SE9102361A patent/SE513521C2/sv not_active IP Right Cessation
- 1991-08-15 CA CA002049225A patent/CA2049225C/en not_active Expired - Fee Related
- 1991-09-02 ES ES09101966A patent/ES2038075B1/es not_active Expired - Fee Related
- 1991-09-04 IT ITMI912350A patent/IT1251549B/it active IP Right Grant
- 1991-09-04 FR FR9110914A patent/FR2666707B1/fr not_active Expired - Fee Related
- 1991-09-06 DE DE4129657A patent/DE4129657C2/de not_active Expired - Fee Related
- 1991-09-07 KR KR1019910015636A patent/KR950003018B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
GB2248708B (en) | 1994-07-27 |
FR2666707A1 (fr) | 1992-03-13 |
SE513521C2 (sv) | 2000-09-25 |
KR920007348A (ko) | 1992-04-28 |
SE9102361D0 (sv) | 1991-08-15 |
ITMI912350A1 (it) | 1993-03-04 |
CA2049225A1 (en) | 1992-03-08 |
DE4129657C2 (de) | 1994-02-24 |
US5195111A (en) | 1993-03-16 |
ITMI912350A0 (it) | 1991-09-04 |
SE9102361L (sv) | 1992-03-08 |
DE4129657A1 (de) | 1992-03-12 |
GB2248708A (en) | 1992-04-15 |
KR950003018B1 (ko) | 1995-03-29 |
CA2049225C (en) | 1996-10-22 |
ES2038075B1 (es) | 1994-06-16 |
FR2666707B1 (fr) | 1996-06-07 |
GB9117506D0 (en) | 1991-10-02 |
ES2038075A1 (es) | 1993-07-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted | ||
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19970930 |