ES2046113A2 - Modulator with variable output channel - Google Patents

Modulator with variable output channel

Info

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
Application number
ES9200919A
Other languages
Spanish (es)
Other versions
ES2046113B1 (en
ES2046113R (en
Inventor
I Miquel Barba
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.)
Tagra SA
Original Assignee
Tagra SA
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 Tagra SA filed Critical Tagra SA
Priority to ES9200919A priority Critical patent/ES2046113B1/en
Publication of ES2046113A2 publication Critical patent/ES2046113A2/en
Publication of ES2046113R publication Critical patent/ES2046113R/es
Application granted granted Critical
Publication of ES2046113B1 publication Critical patent/ES2046113B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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.
ES9200919A 1992-05-04 1992-05-04 MODULATOR WITH VARIABLE OUTPUT CHANNEL. Expired - Lifetime ES2046113B1 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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