GB457109A - Improvements in radio receivers - Google Patents

Improvements in radio receivers

Info

Publication number
GB457109A
GB457109A GB1472135A GB1472135A GB457109A GB 457109 A GB457109 A GB 457109A GB 1472135 A GB1472135 A GB 1472135A GB 1472135 A GB1472135 A GB 1472135A GB 457109 A GB457109 A GB 457109A
Authority
GB
United Kingdom
Prior art keywords
wave
range
acceptor circuit
receiver
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
GB1472135A
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.)
Philco Radio and Television Corp
Original Assignee
Philco Radio and Television Corp
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 Philco Radio and Television Corp filed Critical Philco Radio and Television Corp
Priority to GB1472135A priority Critical patent/GB457109A/en
Publication of GB457109A publication Critical patent/GB457109A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/109—Means associated with receiver for limiting or suppressing noise or interference by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input

Abstract

457,109. Wireless receiving systems. COUTTS & CO., 440, Strand, London, and JOHNSON, F., 218, Victoria Drive, Eastbourne, [Representatives of JOHNSON, J. Y.].-(Philco Radio & Television Corporation ; Tioga Street, Philadelphia, U.S.A.) May 20, 1935, No. 14721. [Class 40 (v)] In a superheterodyne receiver, the output circuit of a radio frequency amplifier is provided with means to prevent interference at frequencies in the vicinity of the intermediate frequency used, and switching means is provided to adapt the signal transfer means to one of a plurality of wave-bands. Fig. 1 shows an acceptor circuit LC in parallel with the intervalve transformer T. In a modification, Fig. 2 (not shown), the inductance L is formed as an extension of the transformer primary winding. In a multi-band receiver, Fig. 3 (not shown), the acceptor circuit may be connected to the waveband switch and the inductance L is given a low distributed capacity. Fig. 4 shows a three wave-range receiver in which the acceptor circuit is short circuited on the highest frequency range and the coupling transformer on this range is given a low impedance so as to be ineffective when in series on the other wave ranges. Specification 422,312 is referred to.
GB1472135A 1935-05-20 1935-05-20 Improvements in radio receivers Expired GB457109A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1472135A GB457109A (en) 1935-05-20 1935-05-20 Improvements in radio receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1472135A GB457109A (en) 1935-05-20 1935-05-20 Improvements in radio receivers

Publications (1)

Publication Number Publication Date
GB457109A true GB457109A (en) 1936-11-20

Family

ID=10046308

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1472135A Expired GB457109A (en) 1935-05-20 1935-05-20 Improvements in radio receivers

Country Status (1)

Country Link
GB (1) GB457109A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3040255A (en) * 1959-05-27 1962-06-19 Gen Instrument Corp Transistorized tuning circuit for television tuner or the like
EP0201986A2 (en) * 1985-04-10 1986-11-20 Uniden Corporation Intermodulation suppressing circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3040255A (en) * 1959-05-27 1962-06-19 Gen Instrument Corp Transistorized tuning circuit for television tuner or the like
EP0201986A2 (en) * 1985-04-10 1986-11-20 Uniden Corporation Intermodulation suppressing circuit
EP0201986A3 (en) * 1985-04-10 1988-11-30 Uniden Corporation Intermodulation suppressing circuit

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