DE3070835D1 - Selective-call communications receiver - Google Patents

Selective-call communications receiver

Info

Publication number
DE3070835D1
DE3070835D1 DE8080303579T DE3070835T DE3070835D1 DE 3070835 D1 DE3070835 D1 DE 3070835D1 DE 8080303579 T DE8080303579 T DE 8080303579T DE 3070835 T DE3070835 T DE 3070835T DE 3070835 D1 DE3070835 D1 DE 3070835D1
Authority
DE
Germany
Prior art keywords
selective
communications receiver
call communications
call
receiver
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
Application number
DE8080303579T
Other languages
English (en)
Inventor
Keith H Wycoff
William H Dittmer
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of DE3070835D1 publication Critical patent/DE3070835D1/de
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
    • H03J1/0091—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor provided with means for scanning over a band of frequencies
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/005—Control by a pilot signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/344—Muting responsive to the amount of noise (noise squelch)
DE8080303579T 1979-10-12 1980-10-10 Selective-call communications receiver Expired DE3070835D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US8446079A 1979-10-12 1979-10-12
US06/165,212 US4419765A (en) 1979-10-12 1980-07-01 Signal absence detector

Publications (1)

Publication Number Publication Date
DE3070835D1 true DE3070835D1 (en) 1985-08-08

Family

ID=26771007

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8080303579T Expired DE3070835D1 (en) 1979-10-12 1980-10-10 Selective-call communications receiver

Country Status (3)

Country Link
US (1) US4419765A (de)
EP (1) EP0027365B1 (de)
DE (1) DE3070835D1 (de)

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US6359547B1 (en) 1994-11-15 2002-03-19 William D. Denison Electronic access control device
JP2655107B2 (ja) * 1994-12-09 1997-09-17 日本電気株式会社 スペクトラム拡散受信機
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Also Published As

Publication number Publication date
EP0027365B1 (de) 1985-07-03
EP0027365A1 (de) 1981-04-22
US4419765A (en) 1983-12-06

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition