GB1165314A - Improvements in or relating to Phase Switching Circuit Arrangements - Google Patents
Improvements in or relating to Phase Switching Circuit ArrangementsInfo
- Publication number
- GB1165314A GB1165314A GB691468A GB691468A GB1165314A GB 1165314 A GB1165314 A GB 1165314A GB 691468 A GB691468 A GB 691468A GB 691468 A GB691468 A GB 691468A GB 1165314 A GB1165314 A GB 1165314A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phase
- switching
- output
- voltage
- conducts
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N11/00—Colour television systems
- H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
- H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
- H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system
- H04N11/16—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system the chrominance signal alternating in phase, e.g. PAL-system
- H04N11/165—Decoding means therefor
-
- 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
- H03H7/18—Networks for phase shifting
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
- Color Television Systems (AREA)
Abstract
1,165,314. Phase-shifting circuits. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. 13 Feb., 1968 [2 March, 1967], No. 6914/68. Heading H2F. [Also in Division H4] A phase-switching circuit arrangement which may be used in a PAL colour TV receiver for repetitively switching the phase of a reference carrier through 90 degrees, comprises a resistance 2 in series with an impedance 3 of the same value, means such as the transformer 1 for applying the signal to be phase-switched across the series circuit, a load 4 connected to the junction of the impedances, and switching means adapted alternately to connect the two ends of the series circuit to a point of reference potential. In Fig. 3 the switching means comprises a pair of diodes 6, 7 which are rendered conductive alternately by square wave signals applied to terminals 10 and 11. When diode 6 conducts the output is the voltage across resistance 2, and when diode 7 conducts the output is the voltage across impedance 3. The phase rotation is independent of the output load and the output voltage is the same in both switching positions. A modified circuit uses a centre-tapped transformer, Fig. 3 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1967T0033324 DE1274185B (en) | 1967-03-02 | 1967-03-02 | Circuit arrangement for electronic switching of the phase of an alternating voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1165314A true GB1165314A (en) | 1969-09-24 |
Family
ID=7557675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB691468A Expired GB1165314A (en) | 1967-03-02 | 1968-02-13 | Improvements in or relating to Phase Switching Circuit Arrangements |
Country Status (11)
| Country | Link |
|---|---|
| AT (1) | AT284227B (en) |
| AU (1) | AU425592B2 (en) |
| BE (1) | BE711426A (en) |
| DE (1) | DE1274185B (en) |
| ES (1) | ES351118A1 (en) |
| FI (1) | FI44259B (en) |
| FR (1) | FR1556597A (en) |
| GB (1) | GB1165314A (en) |
| NL (1) | NL6802824A (en) |
| NZ (1) | NZ151731A (en) |
| SE (1) | SE330741B (en) |
-
0
- NZ NZ151731D patent/NZ151731A/xx unknown
-
1967
- 1967-03-02 DE DE1967T0033324 patent/DE1274185B/en active Pending
-
1968
- 1968-02-13 GB GB691468A patent/GB1165314A/en not_active Expired
- 1968-02-23 AU AU34094/68A patent/AU425592B2/en not_active Expired
- 1968-02-28 BE BE711426D patent/BE711426A/xx unknown
- 1968-02-28 NL NL6802824A patent/NL6802824A/xx unknown
- 1968-02-29 FR FR1556597D patent/FR1556597A/fr not_active Expired
- 1968-03-01 AT AT204568A patent/AT284227B/en not_active IP Right Cessation
- 1968-03-01 FI FI56068A patent/FI44259B/fi active
- 1968-03-01 SE SE272168A patent/SE330741B/xx unknown
- 1968-03-01 ES ES351118A patent/ES351118A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| SE330741B (en) | 1970-11-30 |
| FR1556597A (en) | 1969-02-07 |
| DE1274185B (en) | 1968-08-01 |
| AU3409468A (en) | 1969-08-28 |
| NZ151731A (en) | |
| BE711426A (en) | 1968-07-01 |
| AU425592B2 (en) | 1972-06-30 |
| FI44259B (en) | 1971-06-30 |
| AT284227B (en) | 1970-09-10 |
| NL6802824A (en) | 1968-09-03 |
| ES351118A1 (en) | 1969-05-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |