GB1473106A - Improvements in or relating to television camera arrangements - Google Patents
Improvements in or relating to television camera arrangementsInfo
- Publication number
- GB1473106A GB1473106A GB3815273A GB3815273A GB1473106A GB 1473106 A GB1473106 A GB 1473106A GB 3815273 A GB3815273 A GB 3815273A GB 3815273 A GB3815273 A GB 3815273A GB 1473106 A GB1473106 A GB 1473106A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- feedback path
- inductor
- pass band
- tube
- 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
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
- H03F1/347—Negative-feedback-circuit arrangements with or without positive feedback using transformers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
1473106 Amplifying circuit EMI Ltd 5 Aug 1974 [11 Aug 1973] 38152/73 Heading H3W A television camera arrangement includes a pick up tube coupled to a head amplifier 1 by reactive components which form a filter for the output signals from the tube, the reactive components having a resonant frequency embraced within the pass band of the filter, the pass band being defined by the frequencies where the amplitude response is 3 db down. In practice Cc and Ca are stray capacitances at the output and input of the tube and amplifier respectively with L the added component. A feedback path 2 may be provided around the amplifier 1 with signals coupled into the input path to the amplifier in a sense which tends to reduce the effective inductance as seen by the signals thereby causing a filter characteristic imposed by the effective inductance and the capacitances to embrace within its pass band the resonant frequency of the unmodified inductor and capacitances. The coupling means can be a ferrite cored transformer T, and may be a current transformer (not shown) with its primary winding in a second feedback path around a second amplifier 2 in the first feedback path. The first feedback path may have an amplifier 2 and inductor C 1 connected in parallel. The inductor 1 and transformer secondary may be combined as one component.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3815273A GB1473106A (en) | 1974-08-05 | 1974-08-05 | Improvements in or relating to television camera arrangements |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3815273A GB1473106A (en) | 1974-08-05 | 1974-08-05 | Improvements in or relating to television camera arrangements |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1473106A true GB1473106A (en) | 1977-05-11 |
Family
ID=10401563
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3815273A Expired GB1473106A (en) | 1974-08-05 | 1974-08-05 | Improvements in or relating to television camera arrangements |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1473106A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2198303A (en) * | 1986-12-05 | 1988-06-08 | Philips Electronic Associated | Amplifier circuit arrangement |
WO2007063494A1 (en) * | 2005-12-02 | 2007-06-07 | Nxp B.V. | Low noise amplifier |
-
1974
- 1974-08-05 GB GB3815273A patent/GB1473106A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2198303A (en) * | 1986-12-05 | 1988-06-08 | Philips Electronic Associated | Amplifier circuit arrangement |
US4779056A (en) * | 1986-12-05 | 1988-10-18 | U.S. Philips Corporation | Active filter |
WO2007063494A1 (en) * | 2005-12-02 | 2007-06-07 | Nxp B.V. | Low noise amplifier |
US8149053B2 (en) | 2005-12-02 | 2012-04-03 | Nxp B.V. | Low noise amplifier |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
435 | Patent endorsed 'licences of right' on the date specified (sect. 35/1949) | ||
PCNP | Patent ceased through non-payment of renewal fee |