GB1533097A - Radio receiver blanker gate - Google Patents
Radio receiver blanker gateInfo
- Publication number
- GB1533097A GB1533097A GB714277A GB714277A GB1533097A GB 1533097 A GB1533097 A GB 1533097A GB 714277 A GB714277 A GB 714277A GB 714277 A GB714277 A GB 714277A GB 1533097 A GB1533097 A GB 1533097A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gate
- radio receiver
- blanking
- filter
- signal
- 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
Links
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
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
- H03G3/345—Muting during a short period of time when noise pulses are detected, i.e. blanking
Landscapes
- Noise Elimination (AREA)
- Electronic Switches (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
1533097 Gating circuits MOTOROLA Inc 21 Feb 1977 [25 March 1976] 07142/77 Heading H3P A blanking gate 40 for coupling two stages of a radio receiver, comprises an input transformer 42 and an output transformer 44 coupled together by means forming a filter 42b, 50, 52, 44a, the coupling means being shunted by a signal-controlled switch 56, 58 responsive to a blanking signal from 16 to close the gate. In the embodiment described the gate is between the mixer stage 20 and the IF amplifier 26 of the receiver, and the filter has a bandpass Butterworth characteristic centred on the IF. The aim of the circuit is to provide input and output impedance matching and fast switching. In the absence of the blanking signal the diodes 56, 58 are biased off via resistor 66.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US67050076A | 1976-03-25 | 1976-03-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1533097A true GB1533097A (en) | 1978-11-22 |
Family
ID=24690646
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB714277A Expired GB1533097A (en) | 1976-03-25 | 1977-02-21 | Radio receiver blanker gate |
| GB3339177A Expired GB1525371A (en) | 1976-03-25 | 1977-08-09 | Dispensing pump |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3339177A Expired GB1525371A (en) | 1976-03-25 | 1977-08-09 | Dispensing pump |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS52117508A (en) |
| BR (1) | BR7701832A (en) |
| CA (1) | CA1080808A (en) |
| DE (1) | DE2713044A1 (en) |
| GB (2) | GB1533097A (en) |
| HK (1) | HK60279A (en) |
| IT (1) | IT1073227B (en) |
| MX (1) | MX143234A (en) |
| MY (1) | MY8000100A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58178611A (en) * | 1982-04-12 | 1983-10-19 | Nippon Telegr & Teleph Corp <Ntt> | Tuning amplifier |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5348165Y2 (en) * | 1972-06-06 | 1978-11-17 |
-
1977
- 1977-02-21 GB GB714277A patent/GB1533097A/en not_active Expired
- 1977-02-21 CA CA272,182A patent/CA1080808A/en not_active Expired
- 1977-02-24 IT IT4820277A patent/IT1073227B/en active
- 1977-03-24 DE DE19772713044 patent/DE2713044A1/en active Pending
- 1977-03-24 BR BR7701832A patent/BR7701832A/en unknown
- 1977-03-25 JP JP3236477A patent/JPS52117508A/en active Granted
- 1977-03-25 MX MX16851677A patent/MX143234A/en unknown
- 1977-08-09 GB GB3339177A patent/GB1525371A/en not_active Expired
-
1979
- 1979-08-23 HK HK60279A patent/HK60279A/en unknown
-
1980
- 1980-12-30 MY MY8000100A patent/MY8000100A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2713044A1 (en) | 1977-09-29 |
| BR7701832A (en) | 1978-01-17 |
| JPS52117508A (en) | 1977-10-03 |
| CA1080808A (en) | 1980-07-01 |
| HK60279A (en) | 1979-08-31 |
| MX143234A (en) | 1981-04-03 |
| JPS5719614B2 (en) | 1982-04-23 |
| IT1073227B (en) | 1985-04-13 |
| MY8000100A (en) | 1980-12-31 |
| GB1525371A (en) | 1978-09-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |