IT1086992B - Circuito di sintonizzazione per un ricevitore eterodina - Google Patents
Circuito di sintonizzazione per un ricevitore eterodinaInfo
- Publication number
- IT1086992B IT1086992B IT29325/77A IT2932577A IT1086992B IT 1086992 B IT1086992 B IT 1086992B IT 29325/77 A IT29325/77 A IT 29325/77A IT 2932577 A IT2932577 A IT 2932577A IT 1086992 B IT1086992 B IT 1086992B
- Authority
- IT
- Italy
- Prior art keywords
- heterodine
- receiver
- tuning circuit
- tuning
- circuit
- Prior art date
Links
Classifications
-
- 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
- H03J7/08—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 varactors, i.e. voltage variable reactive diodes
-
- 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
- H03J5/0254—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 transfered to a D/A converter
- H03J5/0263—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 transfered to a D/A converter the digital values being held in an auxiliary non erasable memory
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Circuits Of Receivers In General (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2650822A DE2650822C3 (de) | 1976-11-06 | 1976-11-06 | Abstimmschaltung für einen Überlagerungsempfänger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT1086992B true IT1086992B (it) | 1985-05-31 |
Family
ID=5992565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT29325/77A IT1086992B (it) | 1976-11-06 | 1977-11-03 | Circuito di sintonizzazione per un ricevitore eterodina |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5357902A (it) |
| DE (1) | DE2650822C3 (it) |
| ES (1) | ES463879A1 (it) |
| FR (1) | FR2370388A1 (it) |
| GB (1) | GB1539647A (it) |
| IT (1) | IT1086992B (it) |
| SE (1) | SE422264B (it) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4245351A (en) * | 1979-07-30 | 1981-01-13 | Rca Corporation | AFT Arrangement for a phase locked loop tuning system |
| DE3912837A1 (de) * | 1989-04-19 | 1990-10-25 | Thomson Brandt Gmbh | Regelschaltung |
-
1976
- 1976-11-06 DE DE2650822A patent/DE2650822C3/de not_active Expired
-
1977
- 1977-11-03 IT IT29325/77A patent/IT1086992B/it active
- 1977-11-03 SE SE7712451A patent/SE422264B/xx unknown
- 1977-11-03 GB GB45723/77A patent/GB1539647A/en not_active Expired
- 1977-11-04 ES ES463879A patent/ES463879A1/es not_active Expired
- 1977-11-04 JP JP13243177A patent/JPS5357902A/ja active Pending
- 1977-11-04 FR FR7733289A patent/FR2370388A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| SE422264B (sv) | 1982-02-22 |
| DE2650822C3 (de) | 1980-03-13 |
| ES463879A1 (es) | 1978-07-01 |
| FR2370388A1 (fr) | 1978-06-02 |
| DE2650822A1 (de) | 1978-05-11 |
| GB1539647A (en) | 1979-01-31 |
| JPS5357902A (en) | 1978-05-25 |
| DE2650822B2 (de) | 1979-07-12 |
| SE7712451L (sv) | 1978-05-07 |
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