JPS4991666A - - Google Patents
Info
- Publication number
- JPS4991666A JPS4991666A JP48130626A JP13062673A JPS4991666A JP S4991666 A JPS4991666 A JP S4991666A JP 48130626 A JP48130626 A JP 48130626A JP 13062673 A JP13062673 A JP 13062673A JP S4991666 A JPS4991666 A JP S4991666A
- Authority
- JP
- Japan
- 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.)
- Granted
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
- H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
- H03G3/301—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
- G01C17/02—Magnetic compasses
- G01C17/28—Electromagnetic compasses
- G01C17/30—Earth-inductor compasses
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
- G01C17/38—Testing, calibrating, or compensating of compasses
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/025—Compensating stray fields
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
- G08C19/38—Electric signal transmission systems using dynamo-electric devices
- G08C19/46—Electric signal transmission systems using dynamo-electric devices of which both rotor and stator carry windings
- G08C19/48—Electric signal transmission systems using dynamo-electric devices of which both rotor and stator carry windings being the type with a three-phase stator and a rotor fed by constant-frequency AC, e.g. selsyn, magslip
-
- 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
- H03G1/0047—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using photo-electric elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J7/00—Multiplex systems in which the amplitudes or durations of the signals in individual channels are characteristic of those channels
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US31814472A | 1972-12-26 | 1972-12-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4991666A true JPS4991666A (esLanguage) | 1974-09-02 |
| JPS5335742B2 JPS5335742B2 (esLanguage) | 1978-09-28 |
Family
ID=23236847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13062673A Expired JPS5335742B2 (esLanguage) | 1972-12-26 | 1973-11-20 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3784753A (esLanguage) |
| JP (1) | JPS5335742B2 (esLanguage) |
| DE (1) | DE2362975A1 (esLanguage) |
| FR (1) | FR2212067A5 (esLanguage) |
| GB (1) | GB1449869A (esLanguage) |
| IT (1) | IT1000203B (esLanguage) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1059311A (en) * | 1974-12-02 | 1979-07-31 | James R. Erspamer | Flux valve heading repeater compensation systems |
| JPS57125173A (en) * | 1981-04-02 | 1982-08-04 | Yoshino Kogyosho Co Ltd | Unsealing mechanism |
| CA1220279A (en) * | 1985-06-20 | 1987-04-07 | Her Majesty The Queen In Right Of Canada As Represented By The Minister Of National Defence Of Her Majesty's Canadian Government | Precision magnetometer orientation device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3619511A (en) * | 1969-07-17 | 1971-11-09 | North American Rockwell | Data normalizing apparatus |
-
1972
- 1972-12-26 US US00318144A patent/US3784753A/en not_active Expired - Lifetime
-
1973
- 1973-11-20 JP JP13062673A patent/JPS5335742B2/ja not_active Expired
- 1973-11-28 GB GB5507273A patent/GB1449869A/en not_active Expired
- 1973-12-06 IT IT54121/73A patent/IT1000203B/it active
- 1973-12-18 DE DE2362975A patent/DE2362975A1/de not_active Withdrawn
- 1973-12-21 FR FR7345908A patent/FR2212067A5/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2212067A5 (esLanguage) | 1974-07-19 |
| IT1000203B (it) | 1976-03-30 |
| US3784753A (en) | 1974-01-08 |
| DE2362975A1 (de) | 1974-06-27 |
| GB1449869A (en) | 1976-09-15 |
| JPS5335742B2 (esLanguage) | 1978-09-28 |