GB340286A - Improvements in electrical frequency changing apparatus - Google Patents
Improvements in electrical frequency changing apparatusInfo
- Publication number
- GB340286A GB340286A GB28990/29A GB2899029A GB340286A GB 340286 A GB340286 A GB 340286A GB 28990/29 A GB28990/29 A GB 28990/29A GB 2899029 A GB2899029 A GB 2899029A GB 340286 A GB340286 A GB 340286A
- Authority
- GB
- United Kingdom
- Prior art keywords
- primary
- frequency
- impulses
- transformers
- energized
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B19/00—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source
- H03B19/03—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source using non-linear inductance
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
- H04L25/03114—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals
- H04L25/03127—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals using only passive components
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
- H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
- H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
- H04L25/062—Setting decision thresholds using feedforward techniques only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/20—Repeater circuits; Relay circuits
- H04L25/24—Relay circuits using discharge tubes or semiconductor devices
Abstract
340,286. Converting. ELECTRICAL RESEARCH PRODUCTS, Inc., 195, Broadway, New York, U.S.A.-(Assignees of Burton, E. T. ; 97, Cypress Street, Millburn, New Jersey, U.S.A.). Sept. 24, 1929, No. 28990. Convention date, Oct. 4, 1928. Addition to 312,338, [Class 38 (ii), Electric currents, Converting &c.] [Class 38 (ii).] Frequency, changing.- In arrangements for multiplying the frequency of alternating currents, two or more static transformers having cores of a material having high permeability at low magnetizing forces are employed, and, by means of D.C. excitation, the cores are worked at such a point on the magnetization curve that high mutual inductance between the primary and secondary windings exists only at certain values of the primary alternating current. Thus, secondary voltage impulses occur at spaced intervals in each transformer, and by giving appropriate phase relationships to the impulses from the several transformers, a series of impulses, which can (by means of inductances and condensers) be shaped into a sinusoidal wave of increased frequency, is obtained. Figs. 1 and 3 show respectively arrangements for obtaining double and triple frequencies, 13, 14 being primary windings energized with A.C. from a source f and carrying also the D.C. exciting current from a battery 17. The secondaries 18, 19 are associated with the shaping devices 20, 21, 22. In the arrangement for trebling frequency (Fig. 3), a third transformer, the primary 23 of which is not supplied with D.C., is associated with the two transformers used in Fig. 1. In another arrangement for increasing frequency five-fold, five transformers are employed, one pair being energized with D.C. to such an extent as to become inductive when the primary A.C. reaches certain amplitudes, another pair being energized with a different value of D.C. so as to become inductive at different values of the primary A.C., and the remaining transformer having no D.C. magnetization so as to be inductive at still different values of the primary A.C. Thus five pairs of impulses of opposite sign per cycle of primary frequency are imparted to the secondary circuit. Cascade formations of the arrangements described are resorted to for still higher frequencies.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US280709A US1936153A (en) | 1928-05-26 | 1928-05-26 | Electric wave transmission system |
| US282381A US1763880A (en) | 1928-06-02 | 1928-06-02 | Signaling system |
| US293816A US1858037A (en) | 1928-07-19 | 1928-07-19 | Zero correcting circuit |
| US306123A US1818463A (en) | 1928-09-15 | 1928-09-15 | Zero correcting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB340286A true GB340286A (en) | 1930-12-24 |
Family
ID=27501288
Family Applications (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB742629A Expired GB312338A (en) | 1928-05-26 | 1929-03-07 | Improvements in or relating to electrical energy translating systems |
| GB769429A Expired GB312904A (en) | 1928-05-26 | 1929-03-08 | Improvements in electrical telegraph and like signalling systems |
| GB1552029A Expired GB315821A (en) | 1928-05-26 | 1929-05-17 | Improvements in amplifiers for telegraphic and like signals |
| GB1951829A Expired GB318989A (en) | 1928-05-26 | 1929-06-25 | Improvements in receivers for telegraphic and like signals |
| GB28990/29A Expired GB340286A (en) | 1928-05-26 | 1929-09-24 | Improvements in electrical frequency changing apparatus |
Family Applications Before (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB742629A Expired GB312338A (en) | 1928-05-26 | 1929-03-07 | Improvements in or relating to electrical energy translating systems |
| GB769429A Expired GB312904A (en) | 1928-05-26 | 1929-03-08 | Improvements in electrical telegraph and like signalling systems |
| GB1552029A Expired GB315821A (en) | 1928-05-26 | 1929-05-17 | Improvements in amplifiers for telegraphic and like signals |
| GB1951829A Expired GB318989A (en) | 1928-05-26 | 1929-06-25 | Improvements in receivers for telegraphic and like signals |
Country Status (3)
| Country | Link |
|---|---|
| DE (4) | DE539187C (en) |
| FR (4) | FR673502A (en) |
| GB (5) | GB312338A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE767199C (en) * | 1935-03-27 | 1952-03-31 | Telefunken Gmbh | Circuit for generating short pulses |
| DE755390C (en) * | 1938-02-17 | 1953-08-10 | Lorenz C Ag | Arrangement for the control of tilting devices by means of synchronizing impulses which pass through a separating device and have lost their edge steepness as a result |
| DE970583C (en) * | 1951-08-10 | 1958-10-09 | Oskar Vierling Dr | Circuit arrangement for the optional switching of alternating current circuits in telecommunications systems |
-
1929
- 1929-03-07 GB GB742629A patent/GB312338A/en not_active Expired
- 1929-03-08 GB GB769429A patent/GB312904A/en not_active Expired
- 1929-03-23 DE DEE39029D patent/DE539187C/en not_active Expired
- 1929-03-26 DE DEE39031D patent/DE540413C/en not_active Expired
- 1929-04-18 FR FR673502D patent/FR673502A/en not_active Expired
- 1929-04-25 FR FR36770D patent/FR36770E/en not_active Expired
- 1929-05-17 GB GB1552029A patent/GB315821A/en not_active Expired
- 1929-05-18 DE DE1929E0039267 patent/DE540412C/en not_active Expired
- 1929-05-31 FR FR37104D patent/FR37104E/en not_active Expired
- 1929-06-25 GB GB1951829A patent/GB318989A/en not_active Expired
- 1929-07-14 DE DE1929E0039570 patent/DE553928C/en not_active Expired
- 1929-07-31 FR FR37685D patent/FR37685E/en not_active Expired
- 1929-09-24 GB GB28990/29A patent/GB340286A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE540412C (en) | 1931-12-23 |
| GB312338A (en) | 1930-06-10 |
| FR37104E (en) | 1930-10-15 |
| FR37685E (en) | 1931-01-14 |
| GB312904A (en) | 1930-06-10 |
| GB318989A (en) | 1930-09-25 |
| FR673502A (en) | 1930-01-16 |
| DE540413C (en) | 1931-12-23 |
| FR36770E (en) | 1930-09-13 |
| GB315821A (en) | 1930-08-18 |
| DE553928C (en) | 1932-07-18 |
| DE539187C (en) | 1931-11-23 |
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