GB797823A - Circuit arrangement to produce a modulated and an unmodulated carrier both of the same frequency and of phase relations independent of the transmitter circuit - Google Patents

Circuit arrangement to produce a modulated and an unmodulated carrier both of the same frequency and of phase relations independent of the transmitter circuit

Info

Publication number
GB797823A
GB797823A GB548056A GB548056A GB797823A GB 797823 A GB797823 A GB 797823A GB 548056 A GB548056 A GB 548056A GB 548056 A GB548056 A GB 548056A GB 797823 A GB797823 A GB 797823A
Authority
GB
United Kingdom
Prior art keywords
carrier
voltage
load resistor
modulated
produce
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
GB548056A
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.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
C Lorenz AG
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 Standard Elektrik Lorenz AG, C Lorenz AG filed Critical Standard Elektrik Lorenz AG
Priority to GB548056A priority Critical patent/GB797823A/en
Publication of GB797823A publication Critical patent/GB797823A/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

Landscapes

  • Amplitude Modulation (AREA)

Abstract

797,823. Amplitude-modulating systems. STANDARD TELEPHONES & CABLES, Ltd. (Lorenz Akt.-Ges., C.). Feb. 22, 1956,.No. 5480/56. Class 40 (5). In a carrier modulator comprising a parallelmodulated unbalanced push-pull carrier amplifier Ro1-Ro2 the cathode of Ro1 is kept more negative than Ro2 by a voltage #Uo giving different non-cancelling carrier voltages and a resultant residual carrier voltage at load resistor R2 and an additive carrier voltage at resistor R 1. The sideband components cancel at R2 and add at R1. Thus an unmodulated output is derived across load resistor R2 and a modulated output is derived across load resistor R1 whose mutual phase relationships are independent of the tuned circuit adjustments. In a second embodiment, Fig. 2 (not shown), the carrier voltage amplitudes are made equal by omitting voltage #Uo and the modulating voltage amplitudes are made unequal by means of an unbalanced modulation transformer.
GB548056A 1956-02-22 1956-02-22 Circuit arrangement to produce a modulated and an unmodulated carrier both of the same frequency and of phase relations independent of the transmitter circuit Expired GB797823A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB548056A GB797823A (en) 1956-02-22 1956-02-22 Circuit arrangement to produce a modulated and an unmodulated carrier both of the same frequency and of phase relations independent of the transmitter circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB548056A GB797823A (en) 1956-02-22 1956-02-22 Circuit arrangement to produce a modulated and an unmodulated carrier both of the same frequency and of phase relations independent of the transmitter circuit

Publications (1)

Publication Number Publication Date
GB797823A true GB797823A (en) 1958-07-09

Family

ID=9796992

Family Applications (1)

Application Number Title Priority Date Filing Date
GB548056A Expired GB797823A (en) 1956-02-22 1956-02-22 Circuit arrangement to produce a modulated and an unmodulated carrier both of the same frequency and of phase relations independent of the transmitter circuit

Country Status (1)

Country Link
GB (1) GB797823A (en)

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