GB866961A - Improvements in or relating to periodic pulse separating circuit arrangements - Google Patents
Improvements in or relating to periodic pulse separating circuit arrangementsInfo
- Publication number
- GB866961A GB866961A GB13028/59A GB1302859A GB866961A GB 866961 A GB866961 A GB 866961A GB 13028/59 A GB13028/59 A GB 13028/59A GB 1302859 A GB1302859 A GB 1302859A GB 866961 A GB866961 A GB 866961A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- valve
- pulse
- cut
- pulse sequence
- 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
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
- H04N5/213—Circuitry for suppressing or minimising impulsive noise
Abstract
866,961. Valve pulse circuits. TELEFUNKEN G.m.b.H. April 16, 1959 [April 17, 1958], No. 13028/59. Class 40(6) [Also in Group XL(b)] A pulse discriminating circuit capable of providing a pulse sequence of predetermined frequency present in an input pulse sequence and of substantially the same shape as the required pulses of the input pulse sequence, comprises an amplifier 4 in which the input pulse sequence 1 is applied to a control electrode, a control voltage being derived from the output and fed via a time constant circuit 10, 11 to another control electrode to cut off the amplifier 4 at the end of the first required pulse, the time constant circuit 10, 11 being dimensioned so as to maintain the amplifier cut off until just before the next required pulse of the input pulse sequence 1. In the circuit described, the valve 4 is cut off after each positive pulse 1, rendering the valve 8 fully conductive. The fall at the anode of valve 8 is passed by a capacitor 10 to the grid of valve 4 holding it cut off until capacitor 10 has discharged via resistor 11. The discharge time of circuit 10, 11 may be made longer than the period of the incoming pulses so that the circuit acts as a frequency devider. Fig. 4a (not shown) relates to the use of the circuit to separate television synchronizing pulses from a video waveform containing interference.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE866961X | 1958-04-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB866961A true GB866961A (en) | 1961-05-03 |
Family
ID=6802074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13028/59A Expired GB866961A (en) | 1958-04-17 | 1959-04-16 | Improvements in or relating to periodic pulse separating circuit arrangements |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB866961A (en) |
-
1959
- 1959-04-16 GB GB13028/59A patent/GB866961A/en not_active Expired
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