GB1528814A - Electrical signal generators - Google Patents
Electrical signal generatorsInfo
- Publication number
- GB1528814A GB1528814A GB5037975A GB5037975A GB1528814A GB 1528814 A GB1528814 A GB 1528814A GB 5037975 A GB5037975 A GB 5037975A GB 5037975 A GB5037975 A GB 5037975A GB 1528814 A GB1528814 A GB 1528814A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- counter
- generator
- range
- change
- 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
- 230000000977 initiatory effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
- H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
- H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
- H03J5/0272—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
- H03J7/02—Automatic frequency control
- H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
- H03J7/06—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers
- H03J7/065—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers the counter or frequency divider being used in a phase locked loop
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5037975A GB1528814A (en) | 1975-12-09 | 1975-12-09 | Electrical signal generators |
DE19762655138 DE2655138A1 (de) | 1975-12-09 | 1976-12-06 | Elektrischer signalgenerator |
FR7636697A FR2335094A1 (fr) | 1975-12-09 | 1976-12-06 | Generateur de signaux electriques |
JP14827176A JPS5296857A (en) | 1975-12-09 | 1976-12-09 | Electric signal generator |
US05/855,300 US4147993A (en) | 1975-12-09 | 1977-11-28 | Electrical signal generators |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5037975A GB1528814A (en) | 1975-12-09 | 1975-12-09 | Electrical signal generators |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1528814A true GB1528814A (en) | 1978-10-18 |
Family
ID=10455703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5037975A Expired GB1528814A (en) | 1975-12-09 | 1975-12-09 | Electrical signal generators |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS5296857A (de) |
DE (1) | DE2655138A1 (de) |
FR (1) | FR2335094A1 (de) |
GB (1) | GB1528814A (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2188804A (en) * | 1986-04-04 | 1987-10-07 | Plessey Co Plc | Frequency synthesiser |
US4862109A (en) * | 1986-04-04 | 1989-08-29 | Plessey Overseas Limited | Processor controlled phase locked loop multi-band frequency synthesizer |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3023371A (en) * | 1958-03-07 | 1962-02-27 | Thompson Ramo Wooldridge Inc | Precision variable frequency generator |
DE1591814C3 (de) * | 1967-09-13 | 1982-03-18 | Wandel & Goltermann Gmbh & Co, 7412 Eningen | Frequenzdekadengenerator |
DE1932764B2 (de) * | 1969-06-27 | 1970-12-17 | Siemens Ag | Schaltung zur wahlweise quasikontinuierlichen Durchstimmung eines dekadischen Frequenzsynthesizers |
-
1975
- 1975-12-09 GB GB5037975A patent/GB1528814A/en not_active Expired
-
1976
- 1976-12-06 FR FR7636697A patent/FR2335094A1/fr active Granted
- 1976-12-06 DE DE19762655138 patent/DE2655138A1/de not_active Ceased
- 1976-12-09 JP JP14827176A patent/JPS5296857A/ja active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2188804A (en) * | 1986-04-04 | 1987-10-07 | Plessey Co Plc | Frequency synthesiser |
US4862109A (en) * | 1986-04-04 | 1989-08-29 | Plessey Overseas Limited | Processor controlled phase locked loop multi-band frequency synthesizer |
GB2188804B (en) * | 1986-04-04 | 1989-12-28 | Plessey Co Plc | Frequency synthesiser |
Also Published As
Publication number | Publication date |
---|---|
FR2335094B1 (de) | 1982-01-08 |
JPS5296857A (en) | 1977-08-15 |
DE2655138A1 (de) | 1977-06-23 |
FR2335094A1 (fr) | 1977-07-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |