DE3887409D1 - FSK-Demodulationsschaltung. - Google Patents

FSK-Demodulationsschaltung.

Info

Publication number
DE3887409D1
DE3887409D1 DE88112938T DE3887409T DE3887409D1 DE 3887409 D1 DE3887409 D1 DE 3887409D1 DE 88112938 T DE88112938 T DE 88112938T DE 3887409 T DE3887409 T DE 3887409T DE 3887409 D1 DE3887409 D1 DE 3887409D1
Authority
DE
Germany
Prior art keywords
demodulation circuit
fsk demodulation
fsk
circuit
demodulation
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.)
Expired - Fee Related
Application number
DE88112938T
Other languages
English (en)
Other versions
DE3887409T2 (de
Inventor
Yasuyuki Oishi
Takeshi Takano
Takaharu Nakamura
Yukio Takeda
Yasunobu Watanabe
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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
Priority claimed from JP21605387A external-priority patent/JPH0738651B2/ja
Priority claimed from JP62233054A external-priority patent/JP2542004B2/ja
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of DE3887409D1 publication Critical patent/DE3887409D1/de
Application granted granted Critical
Publication of DE3887409T2 publication Critical patent/DE3887409T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/14—Demodulator circuits; Receiver circuits
    • H04L27/144—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements
    • H04L27/152—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements using controlled oscillators, e.g. PLL arrangements
    • H04L27/1525—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements using controlled oscillators, e.g. PLL arrangements using quadrature demodulation
DE3887409T 1987-08-29 1988-08-09 FSK-Demodulationsschaltung. Expired - Fee Related DE3887409T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP21605387A JPH0738651B2 (ja) 1987-08-29 1987-08-29 Ｆｓｋ復調回路
JP62233054A JP2542004B2 (ja) 1987-09-17 1987-09-17 Ｆｓｋ復調回路

Publications (2)

Publication Number Publication Date
DE3887409D1 true DE3887409D1 (de) 1994-03-10
DE3887409T2 DE3887409T2 (de) 1994-06-30

Family

ID=26521206

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3887409T Expired - Fee Related DE3887409T2 (de) 1987-08-29 1988-08-09 FSK-Demodulationsschaltung.

Country Status (4)

Country Link
US (1) US4870659A (de)
EP (1) EP0305775B1 (de)
CA (1) CA1287127C (de)
DE (1) DE3887409T2 (de)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2232853A (en) * 1989-05-31 1990-12-19 Philips Electronic Associated Zero crossing detector arrangements
US5081650A (en) * 1989-07-12 1992-01-14 Matsushita Electric Industrial Co., Ltd. Data receiver
JPH0797779B2 (ja) * 1989-08-25 1995-10-18 松下電器産業株式会社 ９０度移相器とデータ受信機
JP2820511B2 (ja) * 1990-07-18 1998-11-05 富士通株式会社 コヒーレント光通信用偏波ダイバーシティ受信装置
JP3226561B2 (ja) * 1991-02-22 2001-11-05 株式会社東芝 Ｆｓｋ信号受信回路
JPH04269021A (ja) * 1991-02-25 1992-09-25 Nec Corp 双方向ページングシステムおよび該システムに用いられる携帯無線機
DE19614979C2 (de) 1995-04-20 2001-05-17 Fujitsu Ltd Hochfrequenz-Sende-Empfangs-Vorrichtung zur Datenkommunikation
US6061551A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for down-converting electromagnetic signals
US7515896B1 (en) 1998-10-21 2009-04-07 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships
US6694128B1 (en) 1998-08-18 2004-02-17 Parkervision, Inc. Frequency synthesizer using universal frequency translation technology
US6091940A (en) 1998-10-21 2000-07-18 Parkervision, Inc. Method and system for frequency up-conversion
US6049706A (en) 1998-10-21 2000-04-11 Parkervision, Inc. Integrated frequency translation and selectivity
US6370371B1 (en) 1998-10-21 2002-04-09 Parkervision, Inc. Applications of universal frequency translation
US7236754B2 (en) 1999-08-23 2007-06-26 Parkervision, Inc. Method and system for frequency up-conversion
US6560301B1 (en) 1998-10-21 2003-05-06 Parkervision, Inc. Integrated frequency translation and selectivity with a variety of filter embodiments
US6813485B2 (en) 1998-10-21 2004-11-02 Parkervision, Inc. Method and system for down-converting and up-converting an electromagnetic signal, and transforms for same
US7039372B1 (en) 1998-10-21 2006-05-02 Parkervision, Inc. Method and system for frequency up-conversion with modulation embodiments
US6542722B1 (en) 1998-10-21 2003-04-01 Parkervision, Inc. Method and system for frequency up-conversion with variety of transmitter configurations
US6061555A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for ensuring reception of a communications signal
US6704558B1 (en) 1999-01-22 2004-03-09 Parkervision, Inc. Image-reject down-converter and embodiments thereof, such as the family radio service
US6704549B1 (en) 1999-03-03 2004-03-09 Parkvision, Inc. Multi-mode, multi-band communication system
US6879817B1 (en) 1999-04-16 2005-04-12 Parkervision, Inc. DC offset, re-radiation, and I/Q solutions using universal frequency translation technology
US6853690B1 (en) 1999-04-16 2005-02-08 Parkervision, Inc. Method, system and apparatus for balanced frequency up-conversion of a baseband signal and 4-phase receiver and transceiver embodiments
US7065162B1 (en) 1999-04-16 2006-06-20 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same
US7110444B1 (en) 1999-08-04 2006-09-19 Parkervision, Inc. Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations
US7693230B2 (en) 1999-04-16 2010-04-06 Parkervision, Inc. Apparatus and method of differential IQ frequency up-conversion
US8295406B1 (en) 1999-08-04 2012-10-23 Parkervision, Inc. Universal platform module for a plurality of communication protocols
US7010286B2 (en) 2000-04-14 2006-03-07 Parkervision, Inc. Apparatus, system, and method for down-converting and up-converting electromagnetic signals
US7454453B2 (en) 2000-11-14 2008-11-18 Parkervision, Inc. Methods, systems, and computer program products for parallel correlation and applications thereof
US7072427B2 (en) 2001-11-09 2006-07-04 Parkervision, Inc. Method and apparatus for reducing DC offsets in a communication system
US7460584B2 (en) 2002-07-18 2008-12-02 Parkervision, Inc. Networking methods and systems
US7379883B2 (en) 2002-07-18 2008-05-27 Parkervision, Inc. Networking methods and systems
JP3927463B2 (ja) * 2002-07-30 2007-06-06 トヨタ自動車株式会社 ディジタル信号処理受信装置
KR101029698B1 (ko) 2010-03-10 2011-04-18 한국과학기술원 Ｆｓｋ 복조 장치
EP2600529A3 (de) * 2011-11-30 2016-02-24 Sequans Communications Limited Steuerkreis

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2057820B (en) * 1979-09-04 1984-07-04 Standard Telephones Cables Ltd Radio receiver for fsk signals
US4338579A (en) * 1980-07-30 1982-07-06 Communications Satelite Corp. Frequency shift offset quadrature modulation and demodulation
US4475219A (en) * 1982-08-18 1984-10-02 General Electric Company Demodulator for frequency-shift-keyed binary data signals
JPS59126345A (ja) * 1983-01-10 1984-07-20 Hitachi Ltd フラグ同期誤差抽出回路
US4501002A (en) * 1983-02-28 1985-02-19 Auchterlonie Richard C Offset QPSK demodulator and receiver
JPS60100859A (ja) * 1983-11-08 1985-06-04 Nec Corp 周波数検波器
CH667170A5 (de) * 1984-12-07 1988-09-15 Industrieorientierte Forsch Verfahren zur detektion der information eines empfangssignales, insbesondere mit frequenzumtastung.
DE3516492A1 (de) * 1985-05-08 1986-11-13 Standard Elektrik Lorenz Ag, 7000 Stuttgart Funkempfaenger
US4605903A (en) * 1985-11-07 1986-08-12 Motorola, Inc. FSK demodulator with high noise immunity digital phase detector
JPH0712178B2 (ja) * 1986-02-08 1995-02-08 日本電気株式会社 デイジタル変復調システム
JPS62196921A (ja) * 1986-02-25 1987-08-31 Nec Corp 位相検出回路
JP3085061B2 (ja) * 1992-11-30 2000-09-04 富士電機株式会社 ガス絶縁変圧器巻線の軸方向絶縁支持構造
JPH06180933A (ja) * 1992-12-14 1994-06-28 Clarion Co Ltd 記録媒体演奏装置

Also Published As

Publication number Publication date
EP0305775A2 (de) 1989-03-08
CA1287127C (en) 1991-07-30
EP0305775B1 (de) 1994-01-26
EP0305775A3 (en) 1990-04-25
DE3887409T2 (de) 1994-06-30
US4870659A (en) 1989-09-26

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee