IE41291B1 - Improvements in or relating to electrically controllable attenuators for v h f circuits - Google Patents
Improvements in or relating to electrically controllable attenuators for v h f circuitsInfo
- Publication number
- IE41291B1 IE41291B1 IE1025/75A IE102575A IE41291B1 IE 41291 B1 IE41291 B1 IE 41291B1 IE 1025/75 A IE1025/75 A IE 1025/75A IE 102575 A IE102575 A IE 102575A IE 41291 B1 IE41291 B1 IE 41291B1
- Authority
- IE
- Ireland
- Prior art keywords
- impedance
- attenuator
- line transformer
- line
- electrically controllable
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000004020 conductor Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/24—Frequency- independent attenuators
- H03H7/25—Frequency- independent attenuators comprising an element controlled by an electric or magnetic variable
- H03H7/253—Frequency- independent attenuators comprising an element controlled by an electric or magnetic variable the element being a diode
- H03H7/255—Frequency- independent attenuators comprising an element controlled by an electric or magnetic variable the element being a diode the element being a PIN diode
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
- A01N43/88—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms six-membered rings with three ring hetero atoms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/22—Attenuating devices
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G1/00—Details of arrangements for controlling amplification
- H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
- H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
- H03G1/0052—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using diodes
- H03G1/0058—PIN-diodes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/24—Frequency- independent attenuators
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Dentistry (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Attenuators (AREA)
- Non-Reversible Transmitting Devices (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
1510150 Variable attenuators SIEMENS AG 2 May 1975 [10 May 1974] 18364/75 Heading H4R The duality condition is maintained between the impedances of the bridge and shunt arms of a bridged-T-section of an electrically controllable attenuator by providing variable impedance elements which are maintained equal and one of which is connected via a transmission line transformer whose electrical length is an odd-numbered multiple of a quarter wavelength at the mean operating frequency. The surge impedance of the line transformer is preferably equal to that of the attenuator.The line transformer may be a coaxial line, a symmetrical twin-conductor line or a waveguide. As shown the impedance elements are PIN diodes r 2 , Fig. 2, and r 1 , Fig. 3, and the attenuator input and output are constituted by coaxial lines Le, La. In the embodiment of Fig. 2 a quarterwavelength line transformer LT is connected to shunt impedance r 2 . The value of the impedance r 2 is determined by a device EE which supplies a common current ir to both diodes via impedance R 0 and choke Dr. The embodiment of Fig. 3 comprises a line transformer LT' in the bridge arm of the attenuator.
[GB1510150A]
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2422843A DE2422843C3 (en) | 1974-05-10 | 1974-05-10 | Adjustable damping element for especially short electromagnetic waves |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE41291L IE41291L (en) | 1975-11-10 |
| IE41291B1 true IE41291B1 (en) | 1979-12-05 |
Family
ID=5915256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE1025/75A IE41291B1 (en) | 1974-05-10 | 1975-05-07 | Improvements in or relating to electrically controllable attenuators for v h f circuits |
Country Status (16)
| Country | Link |
|---|---|
| JP (1) | JPS5535009B2 (en) |
| AR (1) | AR203915A1 (en) |
| AT (2) | AT349064B (en) |
| BE (1) | BE828889A (en) |
| BR (1) | BR7502878A (en) |
| CH (1) | CH576726A5 (en) |
| DE (1) | DE2422843C3 (en) |
| DK (1) | DK205675A (en) |
| FR (1) | FR2270687B1 (en) |
| GB (1) | GB1510150A (en) |
| IE (1) | IE41291B1 (en) |
| IN (1) | IN142563B (en) |
| IT (1) | IT1037829B (en) |
| LU (1) | LU72421A1 (en) |
| NL (1) | NL7505565A (en) |
| SE (1) | SE400434B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3842425C1 (en) * | 1988-12-16 | 1989-11-23 | Ant Nachrichtentechnik Gmbh, 7150 Backnang, De | Method and device for the temperature compensation of an attenuator |
| DE4115599C2 (en) * | 1991-05-14 | 1994-03-24 | Ant Nachrichtentech | Attenuator |
-
1974
- 1974-05-10 DE DE2422843A patent/DE2422843C3/en not_active Expired
-
1975
- 1975-05-02 GB GB18364/75A patent/GB1510150A/en not_active Expired
- 1975-05-05 IT IT22980/75A patent/IT1037829B/en active
- 1975-05-06 AR AR258657A patent/AR203915A1/en active
- 1975-05-06 AT AT347175A patent/AT349064B/en not_active IP Right Cessation
- 1975-05-06 CH CH581075A patent/CH576726A5/xx not_active IP Right Cessation
- 1975-05-07 JP JP5536775A patent/JPS5535009B2/ja not_active Expired
- 1975-05-07 IE IE1025/75A patent/IE41291B1/en unknown
- 1975-05-07 LU LU72421A patent/LU72421A1/xx unknown
- 1975-05-07 SE SE7505316A patent/SE400434B/en unknown
- 1975-05-09 DK DK205675A patent/DK205675A/en unknown
- 1975-05-09 BE BE156195A patent/BE828889A/en unknown
- 1975-05-09 FR FR7514522A patent/FR2270687B1/fr not_active Expired
- 1975-05-09 BR BR3662/75A patent/BR7502878A/en unknown
- 1975-05-12 NL NL7505565A patent/NL7505565A/en unknown
- 1975-09-12 IN IN1755/CAL/1975A patent/IN142563B/en unknown
-
1976
- 1976-04-28 AT AT310076A patent/AT347175B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| SE400434B (en) | 1978-03-20 |
| SE7505316L (en) | 1975-11-11 |
| LU72421A1 (en) | 1975-08-26 |
| FR2270687A1 (en) | 1975-12-05 |
| IT1037829B (en) | 1979-11-20 |
| NL7505565A (en) | 1975-11-12 |
| AU8100175A (en) | 1976-11-11 |
| AT349064B (en) | 1979-03-26 |
| DE2422843A1 (en) | 1975-11-13 |
| AR203915A1 (en) | 1975-10-31 |
| GB1510150A (en) | 1978-05-10 |
| FR2270687B1 (en) | 1978-02-03 |
| JPS5535009B2 (en) | 1980-09-11 |
| BR7502878A (en) | 1976-03-16 |
| CH576726A5 (en) | 1976-06-15 |
| AT347175B (en) | 1978-08-15 |
| IE41291L (en) | 1975-11-10 |
| ATA347175A (en) | 1978-08-15 |
| DK205675A (en) | 1975-11-11 |
| ATA310076A (en) | 1978-04-15 |
| DE2422843B2 (en) | 1978-02-09 |
| IN142563B (en) | 1977-07-30 |
| JPS50156346A (en) | 1975-12-17 |
| BE828889A (en) | 1975-11-10 |
| DE2422843C3 (en) | 1978-09-21 |
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