NL8003663A - Demodulator. - Google Patents

Demodulator. Download PDF

Info

Publication number: NL8003663A
Authority: NL; Netherlands
Prior art keywords: signals; phase difference; detector; mixing; demodulator
Prior art date: 1979-06-27

Application number

NL8003663A

Other languages

English (en)

Dutch (nl)

Original Assignee

Plessey Handel Investment Ag

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.)

1979-06-27

Filing date

1980-06-24

Publication date

1980-12-30

1980-06-24 Application filed by Plessey Handel Investment Ag filed Critical Plessey Handel Investment Ag

1980-12-30 Publication of NL8003663A publication Critical patent/NL8003663A/nl

Links

238000001514 detection method Methods 0.000 claims description 3
239000000654 additive Substances 0.000 description 1
230000000996 additive effect Effects 0.000 description 1
238000010586 diagram Methods 0.000 description 1

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/54—Circuits using the same frequency for two directions of communication
- H04B1/56—Circuits using the same frequency for two directions of communication with provision for simultaneous communication in two directions
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
- H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
- H03D7/166—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature using two or more quadrature frequency translation stages
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
- H03D7/161—Multiple-frequency-changing all the frequency changers being connected in cascade
- H03D7/163—Multiple-frequency-changing all the frequency changers being connected in cascade the local oscillations of at least two of the frequency changers being derived from a single oscillator
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
- H04B1/408—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency the transmitter oscillator frequency being identical to the receiver local oscillator frequency

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Signal Processing (AREA)
Power Engineering (AREA)
Superheterodyne Receivers (AREA)
Transceivers (AREA)

NL8003663A 1979-06-27 1980-06-24 Demodulator. NL8003663A (nl)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
GB7922417A GB2052196A (en)	1979-06-27	1979-06-27	Demodulators
GB7922417		1979-06-27

Publications (1)

Publication Number	Publication Date
NL8003663A true NL8003663A (nl)	1980-12-30

Family

ID=10506144

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL8003663A NL8003663A (nl)	1979-06-27	1980-06-24	Demodulator.

Country Status (9)

Country	Link
JP (1)	JPS568944A (it)
BR (1)	BR8003834A (it)
DE (1)	DE3023773A1 (it)
DK (1)	DK275980A (it)
FR (1)	FR2460069A1 (it)
GB (1)	GB2052196A (it)
IL (1)	IL60172A0 (it)
IT (1)	IT1131352B (it)
NL (1)	NL8003663A (it)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4499426A (en) *	1980-07-02	1985-02-12	Motorola, Inc.	Baseband discriminator for frequency or transform modulation
GB2300318B (en) *	1981-02-10	1997-03-19	Plessey Co Ltd	Improvements in or relating to transceivers
NL8301179A (nl) *	1983-04-01	1984-11-01	Philips Nv	Ontvanger voor hf-signalen voorzien van een paar parallelle signaalwegen.
NL8301651A (nl) *	1983-05-10	1984-12-03	Philips Nv	Menginrichting voorzien van eerste en tweede kwadratuurmengtrappen.
JPS60224337A (ja) *	1984-04-23	1985-11-08	Nec Corp	受信回路
AT394918B (de) *	1990-04-05	1992-07-27	Klaus Dipl Ing Dr Kerschbaumer	Verfahren zum direkten demodulieren eines hf-signals
JP2800858B2 (ja) *	1991-09-18	1998-09-21	日本電気株式会社	無線電話装置
US5389964A (en) *	1992-12-30	1995-02-14	Information Resources, Inc.	Broadcast channel substitution method and apparatus
US5404161A (en) *	1993-07-27	1995-04-04	Information Resources, Inc.	Tuned signal detector for use with a radio frequency receiver
US6941573B1 (en)	1996-08-07	2005-09-06	Information Resources, Inc.	Television distribution system for signal substitution
US6633550B1 (en)	1997-02-20	2003-10-14	Telefonaktiebolaget Lm Ericsson (Publ)	Radio transceiver on a chip
FR2794311B1 (fr)	1999-05-27	2007-12-14	France Telecom	Filtre passe-bande a reduction de la frequence porteuse
GB0122196D0 (en) *	2001-09-14	2001-10-31	Roke Manor Research	Improvements to the n-plex transceiver

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB1178539A (en) *	1966-12-14	1970-01-21	Plessey Btr Ltd	Improvements in Timing Arrangements for Electrical Signalling Systems
US3577088A (en) *	1969-02-03	1971-05-04	Us Air Force	Sine-cosine to magnitude-phase angle converter
DE2358288A1 (de) *	1973-11-22	1975-06-05	Standard Elektrik Lorenz Ag	Empfaenger fuer frequenzmodulierte hf-signale
NO145257C (no) *	1976-03-16	1982-02-10	Plessey Overseas	Sender/mottager.

1979
- 1979-06-27 GB GB7922417A patent/GB2052196A/en not_active Withdrawn
1980
- 1980-05-27 IL IL60172A patent/IL60172A0/xx unknown
- 1980-06-18 IT IT22867/80A patent/IT1131352B/it active
- 1980-06-19 BR BR8003834A patent/BR8003834A/pt unknown
- 1980-06-24 NL NL8003663A patent/NL8003663A/nl not_active Application Discontinuation
- 1980-06-25 JP JP8639280A patent/JPS568944A/ja active Pending
- 1980-06-25 DE DE19803023773 patent/DE3023773A1/de not_active Withdrawn
- 1980-06-26 DK DK275980A patent/DK275980A/da unknown
- 1980-06-26 FR FR8014227A patent/FR2460069A1/fr active Pending

Also Published As

Publication number	Publication date
JPS568944A (en)	1981-01-29
BR8003834A (pt)	1981-01-13
GB2052196A (en)	1981-01-21
IT1131352B (it)	1986-06-18
FR2460069A1 (fr)	1981-01-16
DK275980A (da)	1980-12-28
DE3023773A1 (de)	1981-01-15
IL60172A0 (en)	1980-07-31
IT8022867A0 (it)	1980-06-18

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Legal Events

Date	Code	Title	Description
1981-09-16	CNR	Transfer of rights (patent application after its laying open for public inspection)	Free format text: PLESSEY OVERSEAS LIMITED
1984-02-01	BV	The patent application has lapsed