SE8203989D0 - LOW HARMONIC DEMODULATOR MEANS - Google Patents

LOW HARMONIC DEMODULATOR MEANS

Info

Publication number
SE8203989D0
SE8203989D0 SE8203989A SE8203989A SE8203989D0 SE 8203989 D0 SE8203989 D0 SE 8203989D0 SE 8203989 A SE8203989 A SE 8203989A SE 8203989 A SE8203989 A SE 8203989A SE 8203989 D0 SE8203989 D0 SE 8203989D0
Authority
SE
Sweden
Prior art keywords
function
square wave
odd harmonics
wave function
deleted
Prior art date
Application number
SE8203989A
Other languages
Swedish (sv)
Other versions
SE8203989L (en
Inventor
E C Wittke
Original Assignee
Singer Co
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 Singer Co filed Critical Singer Co
Publication of SE8203989D0 publication Critical patent/SE8203989D0/en
Publication of SE8203989L publication Critical patent/SE8203989L/en

Links

Classifications

    • 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
    • H03D1/2245—Homodyne or synchrodyne circuits using two quadrature channels
    • H03D1/2254—Homodyne or synchrodyne circuits using two quadrature channels and a phase locked loop
    • 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
    • H03D1/2245—Homodyne or synchrodyne circuits using two quadrature channels
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
    • H03B2200/006—Functional aspects of oscillators
    • H03B2200/007—Generation of oscillations based on harmonic frequencies, e.g. overtone oscillators

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Noise Elimination (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

An apparatus and method for demodulating a synchronous signal utilising a pulse width-modulated equivalent of a modified square wave function to eliminate lower order harmonic distortion. The apparatus includes a switching demodulator 12 which is controlled by a function generator 16 which is synchronised to the input signal. The function generator produces a controlling function which is a square wave function having a fundamental component and an infinite series of odd harmonics of said fundamental component, less at least one of said odd harmonics. The function generator comprises an addressable memory 14 in which the controlling function is stored. The first one of the infinite series of odd harmonics is deleted from the square wave function. In a further example the third, fifth, seventh and ninth harmonics are deleted from the square wave function. <IMAGE>
SE8203989A 1981-06-29 1982-06-28 demodulator SE8203989L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27876581A 1981-06-29 1981-06-29

Publications (2)

Publication Number Publication Date
SE8203989D0 true SE8203989D0 (en) 1982-06-28
SE8203989L SE8203989L (en) 1982-12-30

Family

ID=23066266

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8203989A SE8203989L (en) 1981-06-29 1982-06-28 demodulator

Country Status (9)

Country Link
JP (1) JPS586648A (en)
AU (1) AU8532982A (en)
DE (1) DE3221830A1 (en)
FR (1) FR2508738A1 (en)
GB (1) GB2101825A (en)
IL (1) IL65692A0 (en)
IT (1) IT8222114A0 (en)
NO (1) NO822098L (en)
SE (1) SE8203989L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59158110A (en) * 1983-02-28 1984-09-07 Trio Kenwood Corp Fm demodulator
DE3741423A1 (en) * 1987-12-08 1989-06-22 Licentia Gmbh DIGITAL PHASE SETTING FOR DIGITALLY GENERATED SIGNALS

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902374A (en) * 1973-10-19 1975-09-02 Singer Co Electrostatic rate gyroscope

Also Published As

Publication number Publication date
FR2508738A1 (en) 1982-12-31
NO822098L (en) 1982-12-30
SE8203989L (en) 1982-12-30
JPS586648A (en) 1983-01-14
AU8532982A (en) 1983-01-06
IT8222114A0 (en) 1982-06-29
DE3221830A1 (en) 1983-01-13
GB2101825A (en) 1983-01-19
IL65692A0 (en) 1982-08-31

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