SE338595B - - Google Patents
Info
- Publication number
- SE338595B SE338595B SE832568A SE832568A SE338595B SE 338595 B SE338595 B SE 338595B SE 832568 A SE832568 A SE 832568A SE 832568 A SE832568 A SE 832568A SE 338595 B SE338595 B SE 338595B
- Authority
- SE
- Sweden
- Prior art keywords
- waveforms
- carrier
- modulator
- rectangular
- carrier frequency
- Prior art date
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
- H03C1/60—Modulators in which carrier or one sideband is wholly or partially suppressed with one sideband wholly or partially suppressed
Landscapes
- Amplitude Modulation (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Manipulation Of Pulses (AREA)
Abstract
1,227,440. Single sideband modulators. SIEMENS A.G. 19 June, 1968 [20 June, 1967], No. 29111/68. Heading H3R. In a quadrature modulator in which two modulator circuits are provided for converting two signals which are 90 degrees out of phase with one another and are supplied with respective carrier waveforms which are 90 degrees outof phase with one another, the carrier waveforms are produced from a rectangular waveform having a pulse repetition frequency four times the desired carrier frequency by means of a selector circuit which forms a rectangular pulse train of the desired repetition frequency by selectively gating said rectangular waveform. A sinewave U40, Fig. 3, of four times the carrier frequency is converted by a limiter 41, Fig. 2, into the corresponding rectangular waveform U46. This is applied to the input of a bi-stable trigger circuit producing on lines 47, 48 the oppositely phased rectangular waveforms U47, U48 respectively, of double the carrier frequency. The output on line 47 is applied to the input of a second bi-stable trigger circuit 43, producing on line 49 rectangular waveform U49 of the desired carrier frequency. Waveforms U46, U48 and U49 are applied to an AND gate 44, and waveforms U46, U47 and U49 to an AND gate 45 to produce on the output lines 37, 57 respectively the 90 degrees out of phase pulse trains U37, U57 respectively which are applied to the two carrier inputs of the modulator. The Specification also describes a modulator of the type disclosed in Specification 1,227,439.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1967S0110414 DE1297694B (en) | 1967-06-20 | 1967-06-20 | Quadrature modulator |
DE1967S0110415 DE1299051B (en) | 1967-06-20 | 1967-06-20 | Quadrature modulator |
Publications (1)
Publication Number | Publication Date |
---|---|
SE338595B true SE338595B (en) | 1971-09-13 |
Family
ID=25998791
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE832568A SE338595B (en) | 1967-06-20 | 1968-06-19 | |
SE832668A SE338596B (en) | 1967-06-20 | 1968-06-19 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE832668A SE338596B (en) | 1967-06-20 | 1968-06-19 |
Country Status (5)
Country | Link |
---|---|
JP (2) | JPS546858B1 (en) |
DE (2) | DE1299051B (en) |
GB (2) | GB1227439A (en) |
NL (2) | NL157163B (en) |
SE (2) | SE338595B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2213620B1 (en) * | 1972-12-20 | 1977-02-04 | Cit Alcatel | |
FR2562354A1 (en) * | 1984-04-03 | 1985-10-04 | Lmt Radio Professionelle | Single sideband analogue frequency translation circuit |
DE3415152A1 (en) * | 1984-04-21 | 1985-10-31 | ANT Nachrichtentechnik GmbH, 7150 Backnang | Method for linearising quadrature amplitude modulators |
-
1967
- 1967-06-20 DE DE1967S0110415 patent/DE1299051B/en not_active Withdrawn
- 1967-06-20 DE DE1967S0110414 patent/DE1297694B/en not_active Withdrawn
-
1968
- 1968-05-16 NL NL6806938A patent/NL157163B/en unknown
- 1968-05-17 NL NL6807045A patent/NL156871B/en unknown
- 1968-06-19 GB GB1227439D patent/GB1227439A/en not_active Expired
- 1968-06-19 GB GB1227440D patent/GB1227440A/en not_active Expired
- 1968-06-19 SE SE832568A patent/SE338595B/xx unknown
- 1968-06-19 SE SE832668A patent/SE338596B/xx unknown
- 1968-06-19 JP JP4247268A patent/JPS546858B1/ja active Pending
- 1968-06-19 JP JP4247168A patent/JPS546857B1/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE1299051B (en) | 1969-07-10 |
GB1227439A (en) | 1971-04-07 |
NL156871B (en) | 1978-05-16 |
JPS546857B1 (en) | 1979-04-02 |
SE338596B (en) | 1971-09-13 |
NL6806938A (en) | 1968-12-23 |
NL157163B (en) | 1978-06-15 |
GB1227440A (en) | 1971-04-07 |
DE1297694B (en) | 1969-06-19 |
JPS546858B1 (en) | 1979-04-02 |
NL6807045A (en) | 1968-12-23 |
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