GB1005340A - Amplitude modulator - Google Patents

Amplitude modulator

Info

Publication number
GB1005340A
GB1005340A GB2007464A GB2007464A GB1005340A GB 1005340 A GB1005340 A GB 1005340A GB 2007464 A GB2007464 A GB 2007464A GB 2007464 A GB2007464 A GB 2007464A GB 1005340 A GB1005340 A GB 1005340A
Authority
GB
United Kingdom
Prior art keywords
output
terminals
modulator
signals
long
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
GB2007464A
Inventor
Anthony William Locke Mandy
William Arthur Brading
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.)
CABLES Ltd
STC PLC
Original Assignee
CABLES Ltd
Standard Telephone and Cables PLC
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 CABLES Ltd, Standard Telephone and Cables PLC filed Critical CABLES Ltd
Priority to GB2007464A priority Critical patent/GB1005340A/en
Publication of GB1005340A publication Critical patent/GB1005340A/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
    • H03C1/54—Balanced modulators, e.g. bridge type, ring type or double balanced type
    • H03C1/542—Balanced modulators, e.g. bridge type, ring type or double balanced type comprising semiconductor devices with at least three electrodes
    • H03C1/545—Balanced modulators, e.g. bridge type, ring type or double balanced type comprising semiconductor devices with at least three electrodes using bipolar transistors

Landscapes

  • Amplitude Modulation (AREA)

Abstract

1,005,340. Double balanced modulators. STANDARD TELEPHONES & CABLES Ltd. May 14, 1964, No. 20074/64. Heading H3R. A double balanced modulator comprises a long-tailed pair circuit formed by transistors 3 and 4 via which two oppositely phased signals are obtained from a modulating signal applied at terminals 1 and 2 and a pair of transistor switches 7, 12 which are alternately biased by succeeding half-cycles of a carrier voltage connected to terminals 13 and 14 to present alternately a low impedance path between the output terminals 5, 6 of the long-tailed pair and the output terminal 9 of the modulator. Upper and lower sideband signals are obtained between terminal 9 and ground or the output may be combined with the output of a second modulator to which the same modulating and carrier signals shifted in phase by 90 degrees are applied to obtain a single sideband output.
GB2007464A 1964-05-14 1964-05-14 Amplitude modulator Expired GB1005340A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2007464A GB1005340A (en) 1964-05-14 1964-05-14 Amplitude modulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2007464A GB1005340A (en) 1964-05-14 1964-05-14 Amplitude modulator

Publications (1)

Publication Number Publication Date
GB1005340A true GB1005340A (en) 1965-09-22

Family

ID=10139938

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2007464A Expired GB1005340A (en) 1964-05-14 1964-05-14 Amplitude modulator

Country Status (1)

Country Link
GB (1) GB1005340A (en)

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