US1665350A - Modulation system - Google Patents

Modulation system Download PDF

Info

Publication number
US1665350A
US1665350A US202057A US20205727A US1665350A US 1665350 A US1665350 A US 1665350A US 202057 A US202057 A US 202057A US 20205727 A US20205727 A US 20205727A US 1665350 A US1665350 A US 1665350A
Authority
US
United States
Prior art keywords
circuit
frequency
transformer
iron
cored
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 - Lifetime
Application number
US202057A
Other languages
English (en)
Inventor
Gerth Felix
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
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 filed Critical Standard Elektrik Lorenz AG
Application granted granted Critical
Publication of US1665350A publication Critical patent/US1665350A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/08—Amplitude modulation by means of variable impedance element
    • H03C1/10—Amplitude modulation by means of variable impedance element the element being a current-dependent inductor

Definitions

  • The" present invention has reference 1 to high frequency generating systems'tor radio communication purposes comprisinga -liigli frequency alternator supplying a fundamen- -'tal frequency and one or more ironcoi'ed frequency transformers'to raise said fun- -'dan'iental frequency to a higher operating frequency.
  • the. reference v numeral 1 designates a high frequency alteriiator working in a well-known manner upon a circuit (fundamental frequency circuit) comprising a selfeinduction coil. 2, a capacity 3 and the winding 4 of an iron-cored high-frequency transformer 5.
  • the output circuit of the frequency transformer is con-' stituted by a capacity 6, tuning'coil 7, cou- .pling coil 8 and is tuned to and carries a frequency. being a multiple of the transformer input (alternator) frequency. Coupled to the transformer output or multi-.
  • pli'cation circuit as it is called too, is an intermediary circuit constituted by a capacinvention to ity 9; tunii'ig coil 10', and-ceupling;coils 111 and12. I Electric oscillations are'ti'ansferred from the intermediary circuit to the radiating;
  • the self induction 2; of the fundamentalv transformer 5 isdiinenSiOned tobe saturated frequency circuit is given such a value with respect to the capacity 3, that virtue-of the saturation of thecore and the corresponding alteration of its magnetic permea bility the tuning vofthe fundamental circuit periodically changed from a condition of resonance to a condition ofnon-resonance (critical resonance).
  • the magnetic flux of the core changes suddenly each half-cycle from its positive to its negative saturation value.
  • Short. tension peaks are periodically generated at the terminals of jthe transformer winding and-follow each other at regular intervals which produce byshock vexitati'on damped wave trains of'the natural frequency of the secondary circuit 4:, 6;8, 7
  • 'A radio transmission system of the character described comprising in combina-* tion a high-frequency alternator generating currents of a fundamental frequency, an iron-cored high frequency transformer supplied by said alternator and carrying in'its output circuit currents'of a frequency being a multiple of said fundamental frequency, an antenna load circuit being inoperative cuit and an iron-cored choke device inserted into a resonant circuit being in coupling relation with said transformer output" cir' FELIXGERTH, I

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Near-Field Transmission Systems (AREA)
  • Transmitters (AREA)
  • Coils Or Transformers For Communication (AREA)
US202057A 1926-07-05 1927-06-28 Modulation system Expired - Lifetime US1665350A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE273772X 1926-07-05

Publications (1)

Publication Number Publication Date
US1665350A true US1665350A (en) 1928-04-10

Family

ID=6016968

Family Applications (1)

Application Number Title Priority Date Filing Date
US202057A Expired - Lifetime US1665350A (en) 1926-07-05 1927-06-28 Modulation system

Country Status (3)

Country Link
US (1) US1665350A (bs)
FR (1) FR636613A (bs)
GB (1) GB273772A (bs)

Also Published As

Publication number Publication date
FR636613A (bs) 1928-04-13
GB273772A (en) 1928-01-05

Similar Documents

Publication Publication Date Title
US1601400A (en) High-frequency inductance
US1665350A (en) Modulation system
US2505620A (en) Regulating transformer system
US1462038A (en) Modulating system
GB957078A (en) Improvements in or relating to circuits for generating ultrasonic oscillations
US2003285A (en) Signaling
US1917102A (en) Frequency modulation
US1545040A (en) Multiplying transformer
US2346331A (en) Combined oscillator and reactance tube
US1654932A (en) Magnetic amplifying system
US1937333A (en) Magnetostriction oscillation generator
US1989678A (en) Electrical system
US2098698A (en) Radio transmitting system
US1829419A (en) Frequency multiplication
US3007118A (en) Modulated oscillator
US1645302A (en) Magnetic amplifier and self-modulator
US1875952A (en) Circuit for purifying high frequency radiation
US2184571A (en) Modulation system
US1328610A (en) Method of and means for controlling high-frequency alternating currents
US1848126A (en) Generation and modulation of electric waves
GB256653A (bs)
US2222049A (en) Apparatus for amplifying alternating or pulsating electric currents
US1595794A (en) Wireless telephone system
US1808579A (en) Generation of electric currents
US1933970A (en) Frequency divider