. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. THE CATHODALLY SCREENED CATHODE FOLLOWER HT +. out Figure If the vector grid-cathode voltage is V, the valve current must be gây. The output voltage produced by this current is = a V- ^ The current through Q, must beyco V. C^, and if the grid current is negligible, this current must flow through i?in, producing across it a potential difference j(oV. Cg. 7?in. The total input voltage must therefore be therefore 1 +JojRj^Câ gmR K \+jayRj^C, l+>i?^C + 1 +JcoC,Ri in ^m^ 1 e: g,,RK + 1
. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. THE CATHODALLY SCREENED CATHODE FOLLOWER HT +. out Figure If the vector grid-cathode voltage is V, the valve current must be gây. The output voltage produced by this current is = a V- ^ The current through Q, must beyco V. C^, and if the grid current is negligible, this current must flow through i?in, producing across it a potential difference j(oV. Cg. 7?in. The total input voltage must therefore be therefore 1 +JojRj^Câ gmR K \+jayRj^C, l+>i?^C + 1 +JcoC,Ri in ^m^ 1 e: g,,RK + 1 - 0)2 Q Q /?in /?^^ +yco(C,/?io + Q i?A') Neglecting 1 in comparison with gm^K^ we now consider C'R', the geometric mean of C^Rk and Q/^in, and define a so that QR^ = (!/«) ^'â ^' and C,/?in = a C'R'. Then, letting C'R' = l/coâ out in grn^K 7T 1 11/2 This has a maximum near the frequency where (colco^Y â gm^K^ i-^- where 1/2 I /^ ni I CO gni \ .CoCsR-mJ 260. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Donaldson, Peter Eden Kirwan. New York, Academic Press
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