GB575583A - Improvements in or relating to angle modulated carrier wave receivers - Google Patents
Improvements in or relating to angle modulated carrier wave receiversInfo
- Publication number
- GB575583A GB575583A GB5592/44A GB559244A GB575583A GB 575583 A GB575583 A GB 575583A GB 5592/44 A GB5592/44 A GB 5592/44A GB 559244 A GB559244 A GB 559244A GB 575583 A GB575583 A GB 575583A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- fed
- rectifiers
- equal
- primary
- 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
- 230000000903 blocking effect Effects 0.000 abstract 1
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
- Circuits Of Receivers In General (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
575,583. Frequency modulation. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. March 27, 1944, No. 5592. Convention date, March 27, 1943. [Class 40 (v)] A discriminator circuit for frequency modulation receivers is arranged so that a tuning indicator of the cathode ray type may be connected directly to it. The circuit is of the type in which the signal rectifiers are fed with equal voltages from the primary of a pair of coupled timed circuits, and also with equal and opposite voltages from the secondary of the coupled pair. The rectifiers 3, 4, are fed through blocking condensers 10, 11, from the ends of the secondary circuit 9, 9<1>, the centre point 9<11> of the inductance 9 being earthed. The rectifiers 3, 4 are also fed from the primary circuit 8, 8<1>, via the condensers 17, 18. The anode 22 of the tuning indicator tube 20 is connected to the primary circuit 8, 8', and the control electrodes 24, 25, to the ends of the secondary 9, 9<1>. The shadow angles in the two controlled sectors of the tube are equal when in tune, while modulation of the carrier is indicated by " fluttering " of the shadows. Specification 489,094 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US480762A US2395725A (en) | 1943-03-27 | 1943-03-27 | Frequency modulation receiver tuning indicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB575583A true GB575583A (en) | 1946-02-25 |
Family
ID=23909260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5592/44A Expired GB575583A (en) | 1943-03-27 | 1944-03-27 | Improvements in or relating to angle modulated carrier wave receivers |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2395725A (en) |
| GB (1) | GB575583A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2457016A (en) * | 1945-10-26 | 1948-12-21 | Rca Corp | Frequency modulation receiver tuning aid |
| US2451584A (en) * | 1945-10-27 | 1948-10-19 | Rca Corp | Signal receiver tuning indicator |
| US2417543A (en) * | 1946-01-05 | 1947-03-18 | Press Wireless Inc | Tuning indicator for frequency shift carrier telegraph systems |
| US2784316A (en) * | 1952-03-08 | 1957-03-05 | Hartford Nat Bank & Trust Co | Frequency modulation tuning indicators |
| US2916732A (en) * | 1954-06-19 | 1959-12-08 | Philips Corp | Circuit-arrangement for measuring or indicating electrical values by cathode-ray deflection |
-
1943
- 1943-03-27 US US480762A patent/US2395725A/en not_active Expired - Lifetime
-
1944
- 1944-03-27 GB GB5592/44A patent/GB575583A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2395725A (en) | 1946-02-26 |
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