大電流上迭加的瞬變微弱信號(hào)的測(cè)量
THE MEASUREMENT OF A SMALL TRANSIENT SIGNAL SUPERPOSED ON A LARGE ELECTRIC CURRENT
-
摘要: 在測(cè)量強(qiáng)電平上迭加的瞬變微弱信號(hào)時(shí),常采用手動(dòng)調(diào)節(jié)補(bǔ)償電平和電容隔直兩種方法。本文分析了這兩種方法的缺點(diǎn),給出了一種測(cè)量精度高的電流自動(dòng)補(bǔ)償電路。該電路對(duì)強(qiáng)電流本身變化的補(bǔ)償速度小于50s,可用于在示波器上觀察大于1s/格的瞬變微弱信號(hào)。文中還給出了電路反應(yīng)時(shí)間的數(shù)學(xué)分析和實(shí)際電路的細(xì)節(jié)。
-
關(guān)鍵詞:
Abstract: Two methods, manual backing off and capacitor coupling (by cutting off the d.c. component) are usually used to measure a small transient signal superposed on a large electric current. The shortcomings of them are analysed and an automatic current backing off circuit with high accuracy is described in this paper. The response time of this circuit needed for the compensating a sudden change in the large electric current is less than 50 microseconds. The described circuit can be used for the time scale from 1.... -
聶玉生、沈恂，生物化學(xué)一與生物物理進(jìn)展，1981年，第4期，第53頁.[2] B. Chance, Rapid Flow Methods, Techniques of Chemistry, 6 (1974), 5, G. G. Hammer ed., Wiley,New York.[3] G. G. Hammer, Tempezature-Jump Methods, Techniques of (hemistry, 6 (1974), 147, G. G. Hammes ed., Wiley, New York.[4] J. P. Keene, The Technique of Pulse Radiolyais by Optical Absorption, Pulse Radiolysis, 1965,[5] p. 1, M. F:bert et al. ed，Academic Press, LondonG. Porter, Flash Photolysis, Techniques of CI!emistry,6(1974), 367, G. G. Hammer ed., Wilc;y,New York[6] J. P. Keene, Quaderni dell 'Area di Ricerca dcll'Lmilia-Romagna, 1 (1972), 63.[7] J. P. Itc.ene, and C. Bell, Int. J. :ftadiat. Phys. C.hem., 5 (1973), 463. -
計(jì)量
- 文章訪問數(shù): 1588
- HTML全文瀏覽量: 109
- PDF下載量: 430
- 被引次數(shù): 0
下載:
