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Nonblocking Double‐Line Linear Pulse Amplifier

 

作者: Edward Fairstein,  

 

期刊: Review of Scientific Instruments  (AIP Available online 1956)
卷期: Volume 27, issue 7  

页码: 475-482

 

ISSN:0034-6748

 

年代: 1956

 

DOI:10.1063/1.1715613

 

出版商: AIP

 

数据来源: AIP

 

摘要:

A linear amplifier with a 1.2‐&mgr;sec clipping time and a gain of 50 000 suitable for scintillation spectrometry is described. Low‐energy photoelectric peaks can be resolved under conditions in which the unwanted background has a rate in excess of 100 000 cps and has components 40 times more energetic than the desired spectrum. No shift in the energy axis is observed under these conditions.The amplifier consists of a White cathode follower preamplifier, three feedback groups, and a White cathode follower output stage. Each of the three feedback groups contains four stages, three of which are amplifiers. Blocking is eliminated by the use of grid resistors low in value compared to the preceding stage plate load resistors. This feedback group configuration is also more linear by an order of magnitude than the conventional configuration. It is shown howRLCcoupling between White cathode follower halves can conserve power supply voltage.It is shown how a cable correctly terminated at the transmitting end rather than at the receiving end can eliminate the difficulties usually associated with the use of a long cable between preamplifier and main amplifier.

 

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