GB1174734A - Improvements in Squelch Circuits - Google Patents

Improvements in Squelch Circuits

Info

Publication number
GB1174734A
GB1174734A GB23951/68A GB2395168A GB1174734A GB 1174734 A GB1174734 A GB 1174734A GB 23951/68 A GB23951/68 A GB 23951/68A GB 2395168 A GB2395168 A GB 2395168A GB 1174734 A GB1174734 A GB 1174734A
Authority
GB
United Kingdom
Prior art keywords
noise
base
detector
signal
output
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
GB23951/68A
Other languages
English (en)
Inventor
James Ross Glasser
Stanley John Tomsa
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.)
Motorola Solutions Inc
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 GB1174734A publication Critical patent/GB1174734A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present
    • H03G3/344—Muting responsive to the amount of noise (noise squelch)

Landscapes

  • Noise Elimination (AREA)
GB23951/68A 1967-06-06 1968-05-20 Improvements in Squelch Circuits Expired GB1174734A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US64387467A 1967-06-06 1967-06-06

Publications (1)

Publication Number Publication Date
GB1174734A true GB1174734A (en) 1969-12-17

Family

ID=24582534

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23951/68A Expired GB1174734A (en) 1967-06-06 1968-05-20 Improvements in Squelch Circuits

Country Status (7)

Country Link
BE (1) BE716156A (cs)
DE (1) DE1766486C2 (cs)
DK (1) DK143677C (cs)
FR (1) FR1566991A (cs)
GB (1) GB1174734A (cs)
IL (1) IL30085A (cs)
NL (1) NL160448C (cs)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1067084B (de) * 1959-10-15 Körting Radio Werke G.m.b.H., Grassau (Chiemgau) Schaltungsanordnung zur Rauschbeseitigung für fadinggeregelte Funkempfangsgeräte
US2343115A (en) * 1941-04-05 1944-02-29 Galvin Mfg Corp Radio receiver circuit
US2515196A (en) * 1945-11-26 1950-07-18 James C Coe Automatic gain control
US2912571A (en) * 1955-04-19 1959-11-10 Motorola Inc Radio receiver with squelch means in audio section and battery saver in output circuit
US3049710A (en) * 1958-01-02 1962-08-14 Gen Electric Continuous tone-controlled squelch system
US3154740A (en) * 1960-09-06 1964-10-27 Motorola Inc Automatic gain control system utilizing a network containing a short time constant and a long time constant
US3116453A (en) * 1960-11-01 1963-12-31 Gen Dynamics Corp Step automatic gain control system
US3230458A (en) * 1962-05-18 1966-01-18 Collins Radio Co Automatic gain control circuit with fast change of time constant
NL298885A (cs) * 1962-10-16

Also Published As

Publication number Publication date
DE1766486A1 (de) 1971-08-05
NL160448C (nl) 1979-10-15
NL6807282A (cs) 1968-12-09
FR1566991A (cs) 1969-05-09
DK143677B (da) 1981-09-21
DK143677C (da) 1982-03-08
BE716156A (cs) 1968-12-06
IL30085A (en) 1971-12-29
DE1766486C2 (de) 1983-08-04
IL30085A0 (en) 1968-07-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee