IL30085A - Squelch filter circuit - Google Patents
Squelch filter circuitInfo
- Publication number
- IL30085A IL30085A IL6830085A IL3008568A IL30085A IL 30085 A IL30085 A IL 30085A IL 6830085 A IL6830085 A IL 6830085A IL 3008568 A IL3008568 A IL 3008568A IL 30085 A IL30085 A IL 30085A
- Authority
- IL
- Israel
- Prior art keywords
- circuit
- filter
- noise voltage
- squelch
- time constant
- Prior art date
Links
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000004044 response Effects 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000005236 sound signal Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 244000145845 chattering Species 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005513 bias potential Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US64387467A | 1967-06-06 | 1967-06-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IL30085A0 IL30085A0 (en) | 1968-07-25 |
| IL30085A true IL30085A (en) | 1971-12-29 |
Family
ID=24582534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL6830085A IL30085A (en) | 1967-06-06 | 1968-05-27 | Squelch filter circuit |
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)
| 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 |
| BE638382A (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 |
|---|---|
| NL160448C (nl) | 1979-10-15 |
| FR1566991A (xx) | 1969-05-09 |
| NL6807282A (xx) | 1968-12-09 |
| DE1766486C2 (de) | 1983-08-04 |
| DK143677B (da) | 1981-09-21 |
| DE1766486A1 (de) | 1971-08-05 |
| DK143677C (da) | 1982-03-08 |
| IL30085A0 (en) | 1968-07-25 |
| GB1174734A (en) | 1969-12-17 |
| BE716156A (xx) | 1968-12-06 |
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