GB2217150B - Frequency responsive systems & methods - Google Patents

Frequency responsive systems & methods

Info

Publication number
GB2217150B
GB2217150B GB8805304A GB8805304A GB2217150B GB 2217150 B GB2217150 B GB 2217150B GB 8805304 A GB8805304 A GB 8805304A GB 8805304 A GB8805304 A GB 8805304A GB 2217150 B GB2217150 B GB 2217150B
Authority
GB
United Kingdom
Prior art keywords
methods
frequency responsive
responsive systems
systems
frequency
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
GB8805304A
Other versions
GB8805304D0 (en
GB2217150A (en
Inventor
Richard Linden Hodgson
Ian Coates
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.)
RACAL TACTICOM SYSTEMS Ltd
Original Assignee
RACAL TACTICOM SYSTEMS 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
Application filed by RACAL TACTICOM SYSTEMS Ltd filed Critical RACAL TACTICOM SYSTEMS Ltd
Priority to GB8805304A priority Critical patent/GB2217150B/en
Publication of GB8805304D0 publication Critical patent/GB8805304D0/en
Publication of GB2217150A publication Critical patent/GB2217150A/en
Application granted granted Critical
Publication of GB2217150B publication Critical patent/GB2217150B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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)
    • 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
    • H03G3/342—Muting when some special characteristic of the signal is sensed which distinguishes it from noise, e.g. using speech detector
GB8805304A 1988-03-05 1988-03-05 Frequency responsive systems & methods Expired - Fee Related GB2217150B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8805304A GB2217150B (en) 1988-03-05 1988-03-05 Frequency responsive systems & methods

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8805304A GB2217150B (en) 1988-03-05 1988-03-05 Frequency responsive systems & methods

Publications (3)

Publication Number Publication Date
GB8805304D0 GB8805304D0 (en) 1988-04-07
GB2217150A GB2217150A (en) 1989-10-18
GB2217150B true GB2217150B (en) 1992-04-01

Family

ID=10632927

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8805304A Expired - Fee Related GB2217150B (en) 1988-03-05 1988-03-05 Frequency responsive systems & methods

Country Status (1)

Country Link
GB (1) GB2217150B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69434275T2 (en) * 1993-12-21 2005-06-30 Thomson Consumer Electronics, Inc., Indianapolis Microcomputer based vehicle detection system of a wireless telephone

Also Published As

Publication number Publication date
GB8805304D0 (en) 1988-04-07
GB2217150A (en) 1989-10-18

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940305