SE8203989D0 - LOW HARMONIC DEMODULATOR MEANS - Google Patents
LOW HARMONIC DEMODULATOR MEANSInfo
- 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
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>
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3902374A (en) * | 1973-10-19 | 1975-09-02 | Singer Co | Electrostatic rate gyroscope |
-
1982
- 1982-05-05 IL IL65692A patent/IL65692A0/en unknown
- 1982-05-14 GB GB08214190A patent/GB2101825A/en not_active Withdrawn
- 1982-06-09 DE DE19823221830 patent/DE3221830A1/en not_active Withdrawn
- 1982-06-22 FR FR8210849A patent/FR2508738A1/en not_active Withdrawn
- 1982-06-23 NO NO82822098A patent/NO822098L/en unknown
- 1982-06-24 JP JP57109116A patent/JPS586648A/en active Pending
- 1982-06-25 AU AU85329/82A patent/AU8532982A/en not_active Abandoned
- 1982-06-28 SE SE8203989A patent/SE8203989L/en not_active Application Discontinuation
- 1982-06-29 IT IT8222114A patent/IT8222114A0/en unknown
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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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NAV | Patent application has lapsed |
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