GB1533432A - Fm tuner - Google Patents
Fm tunerInfo
- Publication number
- GB1533432A GB1533432A GB748976A GB748976A GB1533432A GB 1533432 A GB1533432 A GB 1533432A GB 748976 A GB748976 A GB 748976A GB 748976 A GB748976 A GB 748976A GB 1533432 A GB1533432 A GB 1533432A
- Authority
- GB
- United Kingdom
- Prior art keywords
- output
- maximum output
- characteristic
- differential amplifier
- discriminator
- 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
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J3/00—Continuous tuning
- H03J3/02—Details
- H03J3/12—Electrically-operated arrangements for indicating correct tuning
- H03J3/14—Visual indication, e.g. magic eye
Landscapes
- Amplifiers (AREA)
- Circuits Of Receivers In General (AREA)
- Superheterodyne Receivers (AREA)
Abstract
1533432 Tuning indicators SHIN-SHIRASUNA ELECTRIC CORP 25 Feb 1976 [17 June 1975] 07489/76 Heading H3Q An FM tuning indicator has a transistor differential amplifier 5 responsive to the S-characteristic output of a frequency discriminator 4 for producing a maximum output signal (Fig. 2C, not shown) to a detector 7 such as a meter corresponding to the maximum output of an I.F. signal at its centre frequency (Fig. 2A, not shown) and the zero condition of the S characteristic (Fig. 2B, not shown). As disclosed the impedance of a FET 6 is varied depending on the D.C. component of the output of the discriminator so that this together with the output from an IF amplifier 2 cause the differential amplifier Q 1 , Q 2 to produce a maximum output signal corresponding to the tuned condition of the FM tuner 1.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7333775A JPS51149702A (en) | 1975-06-17 | 1975-06-17 | Method of detecting tuned condition of tuners such as em tuners |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1533432A true GB1533432A (en) | 1978-11-22 |
Family
ID=13515237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB748976A Expired GB1533432A (en) | 1975-06-17 | 1976-02-25 | Fm tuner |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS51149702A (en) |
| DE (1) | DE2610605C3 (en) |
| GB (1) | GB1533432A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2930901A1 (en) * | 1979-07-30 | 1981-02-19 | Shin Shirasuna Electric Corp | Tuning display system for FM receiver - applies IF signal to input of amplifier containing resistor FET controlled by frequency discriminator |
| JPS6194979U (en) * | 1984-11-20 | 1986-06-19 | ||
| DE4241455C1 (en) * | 1992-12-09 | 1994-03-03 | Grundig Emv | Receiving device with automated adjustment during production and search stop using a microcomputer |
-
1975
- 1975-06-17 JP JP7333775A patent/JPS51149702A/en active Granted
-
1976
- 1976-02-25 GB GB748976A patent/GB1533432A/en not_active Expired
- 1976-03-13 DE DE19762610605 patent/DE2610605C3/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2610605B2 (en) | 1980-02-21 |
| DE2610605C3 (en) | 1980-10-16 |
| JPS51149702A (en) | 1976-12-22 |
| DE2610605A1 (en) | 1976-12-23 |
| JPS5754970B2 (en) | 1982-11-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |