GB550899A - Improvements in or relating to systems for modulating high-frequency oscillations with the suppression at least partially of one of the side-bands - Google Patents

Improvements in or relating to systems for modulating high-frequency oscillations with the suppression at least partially of one of the side-bands

Info

Publication number
GB550899A
GB550899A GB1296541A GB1296541A GB550899A GB 550899 A GB550899 A GB 550899A GB 1296541 A GB1296541 A GB 1296541A GB 1296541 A GB1296541 A GB 1296541A GB 550899 A GB550899 A GB 550899A
Authority
GB
United Kingdom
Prior art keywords
frequencies
modulating
band
klc
network
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
GB1296541A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Priority to GB1296541A priority Critical patent/GB550899A/en
Publication of GB550899A publication Critical patent/GB550899A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/52—Modulators in which carrier or one sideband is wholly or partially suppressed
    • H03C1/60—Modulators in which carrier or one sideband is wholly or partially suppressed with one sideband wholly or partially suppressed

Landscapes

  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

550,899. Modulating systems. PHILIPS LAMPS, Ltd. (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). Oct. 7, 1941, No. 12965. [Class 40 (v)] A modulating circuit for giving partial or complete suppression of one side-band whilst permitting undistorted reception with a linear detector, comprises a network KLC to which the carrier is applied, shunted by a modulating voltage source 3 in series with a peak rectifier 2 and a condenser-shunted resistance RC1. The network KLC has high impedance for frequencies between the carrier frequency wand the upper side band limit w+p, and low impedance at other frequencies, as indicated in Fig. 4. The rectifier 4 may be a diode, and the condenser C1 effectively short-circuits the resistance R at modulation frequencies. The modulated output at the terminals 4 has one side-band partially or completely suppressed, but is of such a character that a receiver with a linear detector will give an undistorted output. The network KLC may be modified so that its high-impedance range includes a portion of the lower side-band, thus giving double-sideband transmission for the lower modulating frequencies.
GB1296541A 1941-10-07 1941-10-07 Improvements in or relating to systems for modulating high-frequency oscillations with the suppression at least partially of one of the side-bands Expired GB550899A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1296541A GB550899A (en) 1941-10-07 1941-10-07 Improvements in or relating to systems for modulating high-frequency oscillations with the suppression at least partially of one of the side-bands

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1296541A GB550899A (en) 1941-10-07 1941-10-07 Improvements in or relating to systems for modulating high-frequency oscillations with the suppression at least partially of one of the side-bands

Publications (1)

Publication Number Publication Date
GB550899A true GB550899A (en) 1943-01-29

Family

ID=10014348

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1296541A Expired GB550899A (en) 1941-10-07 1941-10-07 Improvements in or relating to systems for modulating high-frequency oscillations with the suppression at least partially of one of the side-bands

Country Status (1)

Country Link
GB (1) GB550899A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429683A (en) * 1940-06-12 1947-10-28 Hartford Nat Bank & Trust Co Modulation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429683A (en) * 1940-06-12 1947-10-28 Hartford Nat Bank & Trust Co Modulation

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