GB1174734A - Improvements in Squelch Circuits - Google Patents

Improvements in Squelch Circuits

Info

Publication number: GB1174734A
Authority: GB; United Kingdom
Prior art keywords: noise; base; detector; signal; output
Prior art date: 1967-06-06
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.)

1967-06-06

Filing date

1968-05-20

Publication date

1969-12-17

1968-05-20 Application filed by Motorola Inc filed Critical Motorola Inc

1969-12-17 Publication of GB1174734A publication Critical patent/GB1174734A/en

Status Expired legal-status Critical Current

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 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)

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 (xx)
DE (1)	DE1766486C2 (xx)
DK (1)	DK143677C (xx)
FR (1)	FR1566991A (xx)
GB (1)	GB1174734A (xx)
IL (1)	IL30085A (xx)
NL (1)	NL160448C (xx)

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 (xx) *	1962-10-16

1968
- 1968-05-20 GB GB23951/68A patent/GB1174734A/en not_active Expired
- 1968-05-22 DK DK235768A patent/DK143677C/da active
- 1968-05-22 NL NL6807282.A patent/NL160448C/xx active
- 1968-05-27 IL IL6830085A patent/IL30085A/en unknown
- 1968-05-30 DE DE1766486A patent/DE1766486C2/de not_active Expired
- 1968-06-05 FR FR1566991D patent/FR1566991A/fr not_active Expired
- 1968-06-06 BE BE716156D patent/BE716156A/xx unknown

Also Published As

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

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Legal Events

Date	Code	Title
1970-04-29	PS	Patent sealed [section 19, patents act 1949]
1977-10-12	PLE	Entries relating assignments, transmissions, licences in the register of patents
1987-01-14	PCNP	Patent ceased through non-payment of renewal fee