. Electronic apparatus for biological research . \coâ coj out in (JO 0)^ ,C0â CO 16 (A + ly 16 This expression is, naturally enough, equal to ^ at co == co^ and smaller elsewhere. To find the Q of the 'resonance' we consider, as before, the points at which the gain has fallen to Al(2y^^. At these points we have A /l\i/2 = A (2)1/2 (1) 0) CO y(0. CO J + 16 (^+l)2(-_^«) +16 1/2 whence 2 CO CO, l'^'Jo CO + 16 =(.4 + 1) 2 li^ ^ 16 , £0, CO :. ((^ + 1)2-2) 16 201

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