FI884509A0 - Frekvensskillnadsdetektor (fdd) med automatisk foerstaerkningsreglering och en baervaogsmodulerad mottagare innehaollande en fdd. - Google Patents
Frekvensskillnadsdetektor (fdd) med automatisk foerstaerkningsreglering och en baervaogsmodulerad mottagare innehaollande en fdd.Info
- Publication number
- FI884509A0 FI884509A0 FI884509A FI884509A FI884509A0 FI 884509 A0 FI884509 A0 FI 884509A0 FI 884509 A FI884509 A FI 884509A FI 884509 A FI884509 A FI 884509A FI 884509 A0 FI884509 A0 FI 884509A0
- Authority
- FI
- Finland
- Prior art keywords
- fdd
- frekvensskillnadsdetektor
- foerstaerkningsreglering
- baervaogsmodulerad
- mottagare
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
- H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
- H03D3/008—Compensating DC offsets
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
- H03D2200/0001—Circuit elements of demodulators
- H03D2200/0025—Gain control circuits
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Superheterodyne Receivers (AREA)
- Control Of Amplification And Gain Control (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8723313A GB2210743A (en) | 1987-10-05 | 1987-10-05 | Frequency difference detector (fdd) having automatic gain control and a carrier modulated receiver including the fdd |
Publications (2)
Publication Number | Publication Date |
---|---|
FI884509A0 true FI884509A0 (fi) | 1988-09-30 |
FI884509A FI884509A (fi) | 1989-04-06 |
Family
ID=10624793
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI884509A FI884509A (fi) | 1987-10-05 | 1988-09-30 | Frekvensskillnadsdetektor (fdd) med automatisk foerstaerkningsreglering och en baervaogsmodulerad mottagare innehaollande en fdd. |
Country Status (8)
Country | Link |
---|---|
US (1) | US4955078A (fi) |
EP (1) | EP0314208B1 (fi) |
JP (1) | JPH01135115A (fi) |
AU (1) | AU614703B2 (fi) |
DE (1) | DE3878144T2 (fi) |
DK (1) | DK545788A (fi) |
FI (1) | FI884509A (fi) |
GB (1) | GB2210743A (fi) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4808937A (en) * | 1986-07-15 | 1989-02-28 | Hayes Microcomputer Products, Inc. | Phase-locked loop for a modem |
GB2215545A (en) * | 1988-03-16 | 1989-09-20 | Philips Electronic Associated | A direct-conversion receiver |
IT1230401B (it) * | 1989-06-15 | 1991-10-21 | Italtel Spa | Ricevitore a conversione diretta per segnali numerici e metodo per la demodulazione di tali segnali. |
GB2233516B (en) * | 1989-06-23 | 1994-01-05 | Orbitel Mobile Communications | An automatic gain control system |
TW274665B (fi) * | 1992-06-26 | 1996-04-21 | Philips Electronics Nv | |
US5412690A (en) * | 1993-03-08 | 1995-05-02 | Motorola, Inc. | Method and apparatus for receiving electromagnetic radiation within a frequency band |
US5418489A (en) * | 1993-10-08 | 1995-05-23 | Motorola, Inc. | Method of recovering a frequency modulated signal |
US5928152A (en) * | 1994-08-05 | 1999-07-27 | Acuson Corporation | Method and apparatus for a baseband processor of a receive beamformer system |
US5465406A (en) * | 1994-09-06 | 1995-11-07 | Ford Motor Company | Automatic gain control overshoot limiter for AM receiver |
GB9503064D0 (en) * | 1995-02-16 | 1995-04-05 | Philips Electronics Uk Ltd | Improvements in or relating to zero IF receivers |
US6020765A (en) * | 1997-05-30 | 2000-02-01 | Sun Microsystems, Inc. | Frequency difference detector for use with an NRZ signal |
GB2326038A (en) * | 1997-06-06 | 1998-12-09 | Nokia Mobile Phones Ltd | Signal level balancing in quadrature receiver |
DE19738363C2 (de) * | 1997-09-02 | 2000-11-09 | Siemens Ag | Empfänger für Mobilfunksysteme |
US6385442B1 (en) * | 1998-03-04 | 2002-05-07 | Symbol Technologies, Inc. | Multiphase receiver and oscillator |
US6304136B1 (en) | 1999-03-03 | 2001-10-16 | Level One Communications, Inc. | Reduced noise sensitivity, high performance FM demodulator circuit and method |
DE19930229C1 (de) * | 1999-06-30 | 2001-07-05 | Infineon Technologies Ag | Quadricorrelator für einen Demodulator für frequenzmodulierte Signale |
EP1168597A1 (en) * | 2000-06-23 | 2002-01-02 | NTT DoCoMo, Inc. | Quadrature Receiver with Orthogonality Correction |
US6807406B1 (en) * | 2000-10-17 | 2004-10-19 | Rf Micro Devices, Inc. | Variable gain mixer circuit |
US8493058B2 (en) * | 2011-02-25 | 2013-07-23 | Conti Temic Microelectronic Gmbh | Circuit arrangement for frequency determination |
US9716521B2 (en) * | 2015-04-17 | 2017-07-25 | Telefonaktiebolaget Lm Ericsson (Publ) | Optimization of automatic gain control for narrow bandwidth operation |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3160815A (en) * | 1962-09-14 | 1964-12-08 | Collins Radio Co | Coherent frequency difference detector having direct-current output independent of modulation |
HU175236B (hu) * | 1977-01-10 | 1980-06-28 | Hiradastech Ipari Kutato | Sposob i ustrojstvo dlja prijoma i generacii chastotno-modulirovannykh signalov |
US4200871A (en) * | 1977-06-29 | 1980-04-29 | Sperry Corporation | Acquisition system for continuous-wave frequency modulation object detector |
US4677690A (en) * | 1982-01-25 | 1987-06-30 | International Telephone And Telegraph Corporation | Baseband demodulator for FM and/or AM signals |
US4620160A (en) * | 1984-12-17 | 1986-10-28 | Fairchild Weston Systems, Inc. | Digital demodulator for continuously phase or frequency modulated signals |
DE3517485A1 (de) * | 1985-05-15 | 1986-11-20 | Blaupunkt-Werke Gmbh, 3200 Hildesheim | Demodulator fuer frequenzmodulierte signale in digitaler form |
US4736390A (en) * | 1986-10-15 | 1988-04-05 | Itt Avionics, A Division Of Itt Corporation | Zero IF radio receiver apparatus |
-
1987
- 1987-10-05 GB GB8723313A patent/GB2210743A/en not_active Withdrawn
-
1988
- 1988-09-23 US US07/249,635 patent/US4955078A/en not_active Expired - Fee Related
- 1988-09-28 EP EP88202103A patent/EP0314208B1/en not_active Expired - Lifetime
- 1988-09-28 DE DE8888202103T patent/DE3878144T2/de not_active Expired - Fee Related
- 1988-09-30 DK DK545788A patent/DK545788A/da not_active Application Discontinuation
- 1988-09-30 FI FI884509A patent/FI884509A/fi not_active Application Discontinuation
- 1988-10-03 JP JP63247544A patent/JPH01135115A/ja active Pending
- 1988-10-04 AU AU23398/88A patent/AU614703B2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
DK545788A (da) | 1989-04-06 |
US4955078A (en) | 1990-09-04 |
DE3878144T2 (de) | 1993-07-22 |
GB2210743A (en) | 1989-06-14 |
DE3878144D1 (de) | 1993-03-18 |
EP0314208A1 (en) | 1989-05-03 |
FI884509A (fi) | 1989-04-06 |
JPH01135115A (ja) | 1989-05-26 |
EP0314208B1 (en) | 1993-02-03 |
AU2339888A (en) | 1989-04-06 |
GB8723313D0 (en) | 1987-11-11 |
AU614703B2 (en) | 1991-09-05 |
DK545788D0 (da) | 1988-09-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD | Application lapsed | ||
FD | Application lapsed |
Owner name: N.V. PHILIPS GLOEILAMPENFABRIEKEN |