GB1323882A - Circuit arrangements - Google Patents

Circuit arrangements

Info

Publication number
GB1323882A
GB1323882A GB1323882DA GB1323882A GB 1323882 A GB1323882 A GB 1323882A GB 1323882D A GB1323882D A GB 1323882DA GB 1323882 A GB1323882 A GB 1323882A
Authority
GB
United Kingdom
Prior art keywords
transistors
collectors
junction
pairs
circuit arrangements
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
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.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
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 Plessey Co Ltd filed Critical Plessey Co Ltd
Publication of GB1323882A publication Critical patent/GB1323882A/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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/22—Homodyne or synchrodyne circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplitude Modulation (AREA)

Abstract

1323882 Amplitude modulation and demodulation PLESSEY CO Ltd 14 Sept 1970 [16 Oct 1969] 50855/69 Headings H3R and H3T An amplitude modulator/demodulator comprises two long tailed pairs of transistors, e.g. T 4 , T 5 and T 6 ,T 7 having emitter resistors R 5 , R 6 , R 7 , R 8 common collector resistors R 9 , R 10 and further transistors T 2 , T 3 connected to form the "tails" of the pairs. The carrier signal is applied to T 2 , T 3 via transformer TR 1 and the signal to be modulated or demodulated is applied via transformer TR 2 to transistors T 4 ... T 7 . Output may be taken from the junction of the collectors of T 4 , T 5 or a differential output may be obtained between this junction and that of the collectors of T 6 , T 7 .
GB1323882D 1969-10-16 1969-10-16 Circuit arrangements Expired GB1323882A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5085569 1969-10-16

Publications (1)

Publication Number Publication Date
GB1323882A true GB1323882A (en) 1973-07-18

Family

ID=10457661

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1323882D Expired GB1323882A (en) 1969-10-16 1969-10-16 Circuit arrangements

Country Status (1)

Country Link
GB (1) GB1323882A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2623351A1 (en) * 1987-11-18 1989-05-19 Stc Plc PHASE MODULATION CIRCUIT, REPEAT COMPRISING THE SAME, AND TELECOMMUNICATION ASSEMBLY COMPRISING REPEATERS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2623351A1 (en) * 1987-11-18 1989-05-19 Stc Plc PHASE MODULATION CIRCUIT, REPEAT COMPRISING THE SAME, AND TELECOMMUNICATION ASSEMBLY COMPRISING REPEATERS

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee