HK65176A - Switchable frequency tone filter and detector with high speed switching capability - Google Patents

Switchable frequency tone filter and detector with high speed switching capability

Info

Publication number
HK65176A
HK65176A HK651/76*UA HK65176A HK65176A HK 65176 A HK65176 A HK 65176A HK 65176 A HK65176 A HK 65176A HK 65176 A HK65176 A HK 65176A
Authority
HK
Hong Kong
Prior art keywords
detector
high speed
speed switching
frequency tone
switching capability
Prior art date
Application number
HK651/76*UA
Other languages
English (en)
Inventor
A B Wieczorek
R E Poorvin
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of HK65176A publication Critical patent/HK65176A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/022—Selective call receivers
    • H04W88/025—Selective call decoders
    • H04W88/027—Selective call decoders using frequency address codes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/1217—Frequency selective two-port networks using amplifiers with feedback using a plurality of operational amplifiers
    • H03H11/1252—Two integrator-loop-filters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Networks Using Active Elements (AREA)
  • Noise Elimination (AREA)
  • Mobile Radio Communication Systems (AREA)
HK651/76*UA 1972-11-07 1976-10-14 Switchable frequency tone filter and detector with high speed switching capability HK65176A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00304440A US3803429A (en) 1972-11-07 1972-11-07 Switchable frequency tone filter and detector with high speed switching capability

Publications (1)

Publication Number Publication Date
HK65176A true HK65176A (en) 1976-10-22

Family

ID=23176520

Family Applications (1)

Application Number Title Priority Date Filing Date
HK651/76*UA HK65176A (en) 1972-11-07 1976-10-14 Switchable frequency tone filter and detector with high speed switching capability

Country Status (12)

Country Link
US (1) US3803429A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5330561B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AR (1) AR201118A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU (1) AU474076B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BR (1) BR7308706D0 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA985753A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2355700C3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2205779B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1412897A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
HK (1) HK65176A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IL (1) IL43528A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ZA (1) ZA738270B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50135962A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1974-04-16 1975-10-28
US4019142A (en) * 1974-08-16 1977-04-19 Wycoff Keith H Selectively callable receiver operated in accordance with tone characteristics
JPS5146235U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1974-10-04 1976-04-05
JPS587094B2 (ja) * 1975-03-18 1983-02-08 日本電気株式会社 ムセンコベツコシユツホウシキ
AT343213B (de) * 1975-04-08 1978-05-10 Funktechnisches Labor Ernst F Schaltungsanordnung fur einen empfanger fur impulsfolgen
JPS5366309A (en) * 1976-11-26 1978-06-13 Nec Corp Digital type tone signal detector
GB1562121A (en) * 1976-11-26 1980-03-05 Nippon Electric Co Tone signal detecting circuits
US4145656A (en) * 1977-04-27 1979-03-20 Texas Instruments Incorporated Transceiver capable of sensing a clear channel
US4419765A (en) * 1979-10-12 1983-12-06 Keith H. Wycoff Signal absence detector
US4578533A (en) * 1980-11-03 1986-03-25 Universal Data Systems, Inc. Switchable line powered modem
JPS57131991A (en) * 1981-02-09 1982-08-16 Matsushita Electric Ind Co Ltd Gravitation type heat pipe
EP0142586A1 (en) * 1983-11-17 1985-05-29 Budapesti Radiotechnikai Gyar A filter arrangement with active elements
US4659996A (en) * 1984-02-27 1987-04-21 Motorola, Inc. Method and apparatus for de-ringing a switched capacitor filter
JPS61276695A (ja) * 1985-05-31 1986-12-06 Sumitomo Electric Ind Ltd 複合パイプ、その製造方法及びそれを利用したヒ−トパイプ
EP0236579B1 (fr) * 1986-03-11 1990-09-26 Alcatel Bell-Sdt S.A. Procédé de transmission de signaux à fréquences déterminées, notamment les signaux de teléimprimeur
GB2217539B (en) * 1988-04-14 1992-09-23 Plessey Co Plc Prescaler output filter
DE3922977A1 (de) * 1989-07-12 1991-01-24 Texas Instruments Deutschland Trimmschaltung und unter verwendung einer solchen trimmschaltung ausfuehrbares abgleichverfahren
US5142255A (en) * 1990-05-07 1992-08-25 The Texas A&M University System Planar active endfire radiating elements and coplanar waveguide filters with wide electronic tuning bandwidth
DE4038291A1 (de) * 1990-11-29 1992-06-04 Funkwerk Koepenick Gmbh I A Anordnung fuer die auswertung von selektivrufen
US8876512B2 (en) * 2008-09-23 2014-11-04 Cryovac, Inc. Die for coextruding a plurality of fluid layers
US20100072655A1 (en) * 2008-09-23 2010-03-25 Cryovac, Inc. Die, system, and method for coextruding a plurality of fluid layers
US8012572B2 (en) * 2009-03-06 2011-09-06 Cryovac, Inc. Multilayer, heat-shrinkable film comprising a plurality of microlayers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE708317C (de) * 1939-01-17 1943-04-22 Telefunken Gmbh Anordnung zur Daempfung eines an einen Sender angeschlossenen Belastungskreises, insbesondere der Antenne eines Telegraphiesenders, in den Belastungspausen
CH294530A (de) * 1951-10-04 1953-11-15 Patelhold Patentverwertung Verfahren und Einrichtung zum Senden von Impulssignalen mit Frequenztastung, insbesondere für drahtlose Telegraphie.
US3670242A (en) * 1969-12-03 1972-06-13 Lear Siegler Inc A selective paging receiver and decoder employing an electronic filter means
FR2128019B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1970-04-08 1973-05-11 Cit Alcatel

Also Published As

Publication number Publication date
GB1412897A (en) 1975-11-05
AU6185673A (en) 1975-05-01
DE2355700A1 (de) 1974-05-22
IL43528A0 (en) 1974-06-30
JPS5330561B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1978-08-28
BR7308706D0 (pt) 1974-08-22
AU474076B2 (en) 1976-07-15
DE2355700B2 (de) 1977-03-10
AR201118A1 (es) 1975-02-14
US3803429A (en) 1974-04-09
CA985753A (en) 1976-03-16
DE2355700C3 (de) 1986-01-09
JPS4979653A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-08-01
IL43528A (en) 1976-05-31
ZA738270B (en) 1974-09-25
FR2205779A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-05-31
FR2205779B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1978-02-10

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