GB375563A - Improvements in or relating to heterodyne receivers - Google Patents

Improvements in or relating to heterodyne receivers

Info

Publication number
GB375563A
GB375563A GB1959331A GB1959331A GB375563A GB 375563 A GB375563 A GB 375563A GB 1959331 A GB1959331 A GB 1959331A GB 1959331 A GB1959331 A GB 1959331A GB 375563 A GB375563 A GB 375563A
Authority
GB
United Kingdom
Prior art keywords
condenser
wave
circuit
tuning
july
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
GB1959331A
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 GB375563A publication Critical patent/GB375563A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/28—Continuous tuning of more than one resonant circuit simultaneously, the tuning frequencies of the circuits having a substantially constant difference throughout the tuning range

Landscapes

  • Superheterodyne Receivers (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

375,563. Wireless receiving systems. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. July 7, 1931, No. 19593. Convention date, July 7, 1930. [Class 40 (v).] Relates to means for ganging the tuning-controls of a superheterodyne receiver designed to cover two or more wave-bands. In the long-wave position of the wave-change bar B, as shown, the whole of the tuning-coil L is in the input circuit L, C, and co-operates with a condenser C1 in the circuit of the local-oscillator u. When the bar B is moved to the right, only the tapped portion of the inductance L is effective, whilst the condenser C2 replaces condenser C1 in the heterodyne circuit. The plates of the condenser C1, C2 are so shaped as to maintain a constant " beat " frequency throughout both wave-bands, when ganged with the condenser C. The output from the first detector valve g is passed to the intermediate-frequency amplifier Z.
GB1959331A 1930-07-08 1931-07-07 Improvements in or relating to heterodyne receivers Expired GB375563A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE559541T 1930-07-08

Publications (1)

Publication Number Publication Date
GB375563A true GB375563A (en) 1932-06-30

Family

ID=34559050

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1959331A Expired GB375563A (en) 1930-07-08 1931-07-07 Improvements in or relating to heterodyne receivers

Country Status (3)

Country Link
DE (1) DE559541C (en)
FR (1) FR711743A (en)
GB (1) GB375563A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE945703C (en) * 1953-02-06 1956-07-12 Telefunken Gmbh Overlay receiver with double overlay
FR2800370B1 (en) * 1999-10-28 2002-01-04 Roquette Freres PROCESS FOR THE PREPARATION OF A NON-CRYSTALLIZABLE POLYOL SYRUP

Also Published As

Publication number Publication date
FR711743A (en) 1931-09-16
DE559541C (en) 1932-09-21

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