GB1084587A - Improvements in or relating to modulator circuit arrangements - Google Patents

Improvements in or relating to modulator circuit arrangements

Info

Publication number
GB1084587A
GB1084587A GB2439665A GB2439665A GB1084587A GB 1084587 A GB1084587 A GB 1084587A GB 2439665 A GB2439665 A GB 2439665A GB 2439665 A GB2439665 A GB 2439665A GB 1084587 A GB1084587 A GB 1084587A
Authority
GB
United Kingdom
Prior art keywords
inductance
transistor
output
resistance
carrier
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
GB2439665A
Inventor
Ian Peter Kellet
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.)
General Electric Co PLC
Original Assignee
General Electric Co 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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB2439665A priority Critical patent/GB1084587A/en
Publication of GB1084587A publication Critical patent/GB1084587A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/36—Amplitude modulation by means of semiconductor device having at least three electrodes

Abstract

1,084,587. Transistor amplitude modulating circuits. GENERAL ELECTRIC CO. Ltd. June 9, 1966 [June 9, 1965], No. 24396/65. Heading H3R. A suppressed carrier modulating circuit comprises a tapped inductance 7 shunted by a resistance 6 and arranged in series between modulation input terminals 1, 2 and the output load 5, the centre of tap of inductance 7 being switched at carrier frequency to the terminal 2. In the circuit shown, when the transistor 8 is cut off the resistance 6 has a lower impedance than inductance 7 and the input is in effect connected to the output. When transistor 8 conducts the inductance 7 acts as a transformer and the output across load 5 is reversed in phase. With the carrier applied to terminal 9 the output is reversed in phase at carrier frequency and represents a double-sideband suppressed carrier signal. The transistor 8 may be replaced by a diode bridge, and the direct connection between terminals 2 and 4 may be replaced by a second tapped inductance shunted by a second resistance, the switching means connecting the taps of the two inductances.
GB2439665A 1965-06-09 1965-06-09 Improvements in or relating to modulator circuit arrangements Expired GB1084587A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2439665A GB1084587A (en) 1965-06-09 1965-06-09 Improvements in or relating to modulator circuit arrangements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2439665A GB1084587A (en) 1965-06-09 1965-06-09 Improvements in or relating to modulator circuit arrangements

Publications (1)

Publication Number Publication Date
GB1084587A true GB1084587A (en) 1967-09-27

Family

ID=10211085

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2439665A Expired GB1084587A (en) 1965-06-09 1965-06-09 Improvements in or relating to modulator circuit arrangements

Country Status (1)

Country Link
GB (1) GB1084587A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1292220B (en) * 1967-09-29 1974-07-18
DE3118854A1 (en) * 1981-05-13 1982-12-02 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt CIRCUIT ARRANGEMENT FOR FREQUENCY CONVERSION

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1292220B (en) * 1967-09-29 1974-07-18
DE1292220C2 (en) * 1967-09-29 1974-07-18 Siemens AG, Berlin und München, 8000 München QUASI CONTACT MODULATOR FOR CONVERTING MODULATING SIGNALS WITH THE AID OF A CARRIER VOLTAGE AND TO SUPPRESS THE CARRIER AT THE MODULATOR OUTPUT
DE3118854A1 (en) * 1981-05-13 1982-12-02 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt CIRCUIT ARRANGEMENT FOR FREQUENCY CONVERSION

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