GB1314462A - Signal generators - Google Patents
Signal generatorsInfo
- Publication number
- GB1314462A GB1314462A GB1131571A GB1131571A GB1314462A GB 1314462 A GB1314462 A GB 1314462A GB 1131571 A GB1131571 A GB 1131571A GB 1131571 A GB1131571 A GB 1131571A GB 1314462 A GB1314462 A GB 1314462A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- frequency divider
- adjusting
- difference detector
- mixer
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
- H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
- H03L7/185—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number using a mixer in the loop
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
1314462 Frequency synthesizers SPERRY RAND CORP 26 April 1971 [28 April 1970] 11315/71 Heading H3A A signal generator has a closed loop with series-connected elements comprising voltagetuned oscillator means 6, frequency mixer means 1, first frequency divider means 2, and frequency difference detector means 3, wherein there are means provided for adjusting a division modulus N of the first frequency divider means 2. The arrangement also includes second frequency divider means 4, including means for adjusting a division modulus X thereof, for supplying an input to the frequency difference detector means 3, and reference frequency source means 5 for supplying stable frequency signals to the frequency mixer means 1, and to the second frequency divider means 4, the means for adjusting the first and second frequency divider means being adapted to be operated so that the quantity N - X is an integer including zero. The output may be derived from the frequency mixer 1 via a harmonic generator 7. The frequency difference detector 3 may comprise coarse and fine means.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US3267270A | 1970-04-28 | 1970-04-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1314462A true GB1314462A (en) | 1973-04-26 |
Family
ID=21866187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1131571A Expired GB1314462A (en) | 1970-04-28 | 1971-04-26 | Signal generators |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2120935A1 (en) |
FR (1) | FR2086413B1 (en) |
GB (1) | GB1314462A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0944172A2 (en) * | 1998-03-19 | 1999-09-22 | Conexant Systems, Inc. | Phase-locked loop for generating an output signal in two or more frequency ranges |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1473202A (en) * | 1966-01-25 | 1967-03-17 | Cit Alcatel | Regularly scaled frequency generator in a very wide band |
US3448401A (en) * | 1967-08-24 | 1969-06-03 | Bendix Corp | Digital frequency synthesizer eliminating high speed counters |
-
1971
- 1971-04-26 GB GB1131571A patent/GB1314462A/en not_active Expired
- 1971-04-27 FR FR7114912A patent/FR2086413B1/fr not_active Expired
- 1971-04-28 DE DE19712120935 patent/DE2120935A1/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0944172A2 (en) * | 1998-03-19 | 1999-09-22 | Conexant Systems, Inc. | Phase-locked loop for generating an output signal in two or more frequency ranges |
EP0944172A3 (en) * | 1998-03-19 | 2000-03-29 | Conexant Systems, Inc. | Phase-locked loop for generating an output signal in two or more frequency ranges |
Also Published As
Publication number | Publication date |
---|---|
FR2086413A1 (en) | 1971-12-31 |
FR2086413B1 (en) | 1976-03-19 |
DE2120935A1 (en) | 1971-12-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |