GB1259227A - - Google Patents
Info
- Publication number
- GB1259227A GB1259227A GB3999670A GB1259227DA GB1259227A GB 1259227 A GB1259227 A GB 1259227A GB 3999670 A GB3999670 A GB 3999670A GB 1259227D A GB1259227D A GB 1259227DA GB 1259227 A GB1259227 A GB 1259227A
- Authority
- GB
- United Kingdom
- Prior art keywords
- burst
- chrominance
- current
- amplifiers
- colour television
- 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
- H04N9/00—Details of colour television systems
- H04N9/44—Colour synchronisation
- H04N9/455—Generation of colour burst signals; Insertion of colour burst signals in colour picture signals or separation of colour burst signals from colour picture signals
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
- Color Television Systems (AREA)
Abstract
1,259,227. Colour television. THORN ELECTRICAL INDUSTRIES Ltd. 19 Aug., 1970, No. 39996/70. Heading H4F. The phase-reference signals in a PAL system colour television receiver are separated from the chrominance information signals and used for AGC of the composite chrominance amplifier by using two differential amplifiers A1, A2, A3 and A3, A4, A5. A burst gating signal VG controls the switching of current I 3 between amplifiers A4 and A5 providing burst and chrominance outputs respectively, and the burst signal amplitude is itself used to control over VX the current I3 in one limb of the differential amplifier A1, A2, A3. Fig. 3 (not shown) illustrates a realization of the circuit using transistors which is stated to be suitable for thick film or integrated circuit fabrication.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3999670 | 1970-08-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1259227A true GB1259227A (en) | 1972-01-05 |
Family
ID=10412626
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3999670A Expired GB1259227A (en) | 1970-08-19 | 1970-08-19 |
Country Status (6)
Country | Link |
---|---|
AU (1) | AU449015B2 (en) |
DE (1) | DE2141635B2 (en) |
GB (1) | GB1259227A (en) |
NL (1) | NL7111403A (en) |
SE (1) | SE377259B (en) |
ZA (1) | ZA715328B (en) |
-
1970
- 1970-08-19 GB GB3999670A patent/GB1259227A/en not_active Expired
-
1971
- 1971-08-10 ZA ZA715328A patent/ZA715328B/en unknown
- 1971-08-17 AU AU32458/71A patent/AU449015B2/en not_active Expired
- 1971-08-18 NL NL7111403A patent/NL7111403A/xx unknown
- 1971-08-18 SE SE7110523A patent/SE377259B/xx unknown
- 1971-08-19 DE DE2141635A patent/DE2141635B2/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE2141635B2 (en) | 1975-03-06 |
DE2141635A1 (en) | 1972-02-24 |
AU449015B2 (en) | 1974-05-30 |
ZA715328B (en) | 1972-04-26 |
AU3245871A (en) | 1973-02-22 |
SE377259B (en) | 1975-06-23 |
NL7111403A (en) | 1972-02-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1400427A (en) | Video signal processing apparatus | |
ES365161A1 (en) | Automatic contrast control circuit for a television receiver | |
GB1332513A (en) | Signal separation apparatus for stereophonic multiplex receivers | |
GB1337452A (en) | Frequency multiplying cirucit | |
GB1412844A (en) | Synchronizing signal separating circuit | |
GB1432083A (en) | System for processing chrominance signals | |
GB1291906A (en) | Colour television apparatus | |
GB1355223A (en) | Synchronous detector control | |
GB1259227A (en) | ||
GB1031247A (en) | Improvements relating to colour television systems | |
GB1315108A (en) | Chrominance amplifier | |
GB1512149A (en) | Colour television | |
GB1490170A (en) | Automatic gain control circuit | |
GB1487586A (en) | Video amplifier circuit for use with synchronous detector | |
GB961886A (en) | Circuit arrangement for maintaining the synchronization of a television receiver | |
GB1172486A (en) | Chrominance Signal Routing Circuit | |
GB1426007A (en) | Transistor circuit having a hysteresis characterisitc | |
GB489715A (en) | Improvements in or relating to television and like systems | |
GB1022686A (en) | Improvements in or relating to direct-current coupled transistor amplifiers for television signals | |
GB1188752A (en) | Automatic Gain Control Circuit. | |
GB1267894A (en) | Gated video inverter | |
GB1396354A (en) | Sound reproduction systems | |
JPS52137238A (en) | Gain control circuit | |
ES394557A1 (en) | Television demodulator with short and long time constants | |
AU471344B2 (en) | Chrominance signal amplifier stage fora colour television receiver |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
746 | Register noted 'licences of right' (sect. 46/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |