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Effect Feedback Impedance by Blackman (2 results)
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EFFECT OF FEEDBACK ON IMPEDANCE (contained in one complete issue of The Bell System Technical Journal, October 1943)
Publication Date: 1943
Seller: Xerxes Fine and Rare Books and Documents, Glen Head, NY, U.S.A.
Seller rating 5 out of 5 stars
Condition: VG. NY 1943. first edition. In The Bell System Technical Journal, Volume XXII, Number 3 October 1943 at pp. 269-277. Other articles in same issue on other topics. VG plus. small owner name stamp on cover. First appearance of Blackman's Formula used in information theory. near Fine, just slight wear; no ownership marks.
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Effect of Feedback on Impedance. - [BLACKMAN'S IMPEDANCE RELATION]
Seller: Herman H. J. Lynge & Søn ILAB-ABF, Copenhagen, Denmark
Seller rating 4 out of 5 stars
First Edition
New York, American Telephone and Telegraph Company, 1943. 8vo. In the original printed blue wrappers. In "The Bell System Technical Journal", Volume XXII, Number 3, October, 1943. Entire issue offered. Light miscolouring to spine. A very fine fine and clean copy. Pp. 269-277. [Entire issue: Pp- 269-402.]. First printing of Blackman's influential paper on impedance feedback. "The Blackman's impedance relation formula holds several unique and important features. First and most important is generality. The formula is truly universal and could be applied regardless of feedback topology. The impedances of canonical cases could be presented as special cases of Blackman's impedance relation." (Abramovitz, Several Alternative Derivations of Blackman's Impedance Relation).
