ES2046113A2 - Modulator with variable output channel - Google Patents
Modulator with variable output channelInfo
- Publication number
- ES2046113A2 ES2046113A2 ES9200919A ES9200919A ES2046113A2 ES 2046113 A2 ES2046113 A2 ES 2046113A2 ES 9200919 A ES9200919 A ES 9200919A ES 9200919 A ES9200919 A ES 9200919A ES 2046113 A2 ES2046113 A2 ES 2046113A2
- Authority
- ES
- Spain
- Prior art keywords
- modulator
- band
- signal
- channel
- pass filter
- 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.)
- Granted
Links
Landscapes
- Amplitude Modulation (AREA)
- Transmitters (AREA)
Abstract
Modulator with variable output channel, comprising three different parts corresponding to a modulator of first intermediate frequency consisting of a modulator of double side band and a vestigial band pass filter a converter to a second intermediate frequency, formed by a mixer, an oscillator of fixed frequency, and a band pass filter, and a converter to output channel, composed of a mixer, a variable oscillator and a band pass filter. Said modulator, starting with an audio and video signal, obtains a TV signal modulated in amplitude in vestigial band, where the channel of said signal can be selected by the user himself, while no unwanted signal appears within the output frequency band, thus avoiding the need to include a channel filter at the output, and thus the signal can be amplified in wide band and therefore the systems making use of such modulators can be standardised.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES9200919A ES2046113B1 (en) | 1992-05-04 | 1992-05-04 | MODULATOR WITH VARIABLE OUTPUT CHANNEL. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES9200919A ES2046113B1 (en) | 1992-05-04 | 1992-05-04 | MODULATOR WITH VARIABLE OUTPUT CHANNEL. |
Publications (3)
Publication Number | Publication Date |
---|---|
ES2046113A2 true ES2046113A2 (en) | 1994-01-16 |
ES2046113R ES2046113R (en) | 1996-07-16 |
ES2046113B1 ES2046113B1 (en) | 1997-02-16 |
Family
ID=8276898
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES9200919A Expired - Lifetime ES2046113B1 (en) | 1992-05-04 | 1992-05-04 | MODULATOR WITH VARIABLE OUTPUT CHANNEL. |
Country Status (1)
Country | Link |
---|---|
ES (1) | ES2046113B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2272140A1 (en) * | 2004-12-22 | 2007-04-16 | Angel Iglesias, S.A. | Double sideband television modulator |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3955155A (en) * | 1974-12-23 | 1976-05-04 | Rca Corporation | Amplitude modulation system |
DE2343532C3 (en) * | 1972-08-31 | 1982-03-11 | RCA Corp., 10020 New York, N.Y. | Modulator circuit |
US4602287A (en) * | 1983-11-21 | 1986-07-22 | Zenith Electronics Corporation | Intermediate frequency filter with Nyquist phase modulation correction |
ES8707640A1 (en) * | 1986-05-14 | 1987-08-01 | Fagor Electrotecnica | Modulator for t.v. Community (Machine-translation by Google Translate, not legally binding) |
GB2219912A (en) * | 1988-06-10 | 1989-12-20 | British Broadcasting Corp | Vestigial sideband amplitude modulated transmission system with additional data capacity |
ES2021536A6 (en) * | 1990-05-07 | 1991-11-01 | Tagra Sa | Vestigial-band modulator for television |
-
1992
- 1992-05-04 ES ES9200919A patent/ES2046113B1/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2343532C3 (en) * | 1972-08-31 | 1982-03-11 | RCA Corp., 10020 New York, N.Y. | Modulator circuit |
US3955155A (en) * | 1974-12-23 | 1976-05-04 | Rca Corporation | Amplitude modulation system |
US4602287A (en) * | 1983-11-21 | 1986-07-22 | Zenith Electronics Corporation | Intermediate frequency filter with Nyquist phase modulation correction |
ES8707640A1 (en) * | 1986-05-14 | 1987-08-01 | Fagor Electrotecnica | Modulator for t.v. Community (Machine-translation by Google Translate, not legally binding) |
GB2219912A (en) * | 1988-06-10 | 1989-12-20 | British Broadcasting Corp | Vestigial sideband amplitude modulated transmission system with additional data capacity |
ES2021536A6 (en) * | 1990-05-07 | 1991-11-01 | Tagra Sa | Vestigial-band modulator for television |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2272140A1 (en) * | 2004-12-22 | 2007-04-16 | Angel Iglesias, S.A. | Double sideband television modulator |
Also Published As
Publication number | Publication date |
---|---|
ES2046113B1 (en) | 1997-02-16 |
ES2046113R (en) | 1996-07-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RD2A | Seizure of patent freed |
Effective date: 19941115 |
|
EC2A | Search report published |
Effective date: 19940116 |
|
FA2A | Application withdrawn |
Effective date: 19980401 |