GB515584A - Improvements in or relating to radio receivers - Google Patents

Improvements in or relating to radio receivers

Info

Publication number
GB515584A
GB515584A GB16896/38A GB1689638A GB515584A GB 515584 A GB515584 A GB 515584A GB 16896/38 A GB16896/38 A GB 16896/38A GB 1689638 A GB1689638 A GB 1689638A GB 515584 A GB515584 A GB 515584A
Authority
GB
United Kingdom
Prior art keywords
resistance
feeds
tuning indicator
june
transformer
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
Application number
GB16896/38A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB515584A publication Critical patent/GB515584A/en
Expired legal-status Critical Current

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

Abstract

515,584. Wireless receiving circuits. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. June 7, 1938, No. 16896. Convention date, June 4, 1937. [Class 40 (v)] A tuning indicator is operated by a voltage obtained partly from a delayed A.V.C. rectifier and partly from the signal demodulator, the former providing volume control voltages for stages preceding and following the. point from which it is fed. As shown an I.F. transformer B1 feeds an I.F. amplifier Z2 and an A.V.C. diode 1 which is biased by a delay voltage provided by the cathode resistance K of a tuning indicator M. Its load resistance R1, R2 feeds A.V.C. voltages to the following stage Z2 and other preceding stages. The valve Z2 feeds the signal demodulator diode 2, having a load resistance R3, through transformer B2. The voltage for operating the tuning indicator M is derived from a resistance 3 connected in series with resistance 5 across the resistance R3 and in series with resistance 4 across the resistances R1, R2.
GB16896/38A 1937-06-04 1938-06-07 Improvements in or relating to radio receivers Expired GB515584A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE515584X 1937-06-04

Publications (1)

Publication Number Publication Date
GB515584A true GB515584A (en) 1939-12-08

Family

ID=6549024

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16896/38A Expired GB515584A (en) 1937-06-04 1938-06-07 Improvements in or relating to radio receivers

Country Status (2)

Country Link
US (1) US2164979A (en)
GB (1) GB515584A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE468765A (en) * 1945-10-29
US2559038A (en) * 1949-08-01 1951-07-03 Avco Mfg Corp Line pulse keyed automatic gain control circuit with control voltage delay
US4143331A (en) * 1977-12-16 1979-03-06 National Semiconductor Corporation Summing amplifier for developing a squelch and meter voltage in a radio receiver

Also Published As

Publication number Publication date
US2164979A (en) 1939-07-04

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