Gating charge

As k g increases, the depletion width at the drain junction grows and can accommodate more charge. Thus, less charge is needed in the inversion layer to balance the gate charge. Because the surface potential at the drain edge of the channel is k g, when U g — < Up inversion can no longer be... 

Structural models for voltage-dependent gating of ion channels must identify the voltage-sensors or gating charges (Fig. 6-5A) within the channel structure and suggest a plausible mechanism for transmembrane movement... 

Nabauer M, Callewaert G, Cleemann L, Morad M 1989 Regulation of calcium release is gated by calcium current, not gating charge, in cardiac myocytes. Science 244 800—803... 

Fig. 4. Charge distributions in the voltage-biased MOS capacitor (a) accumulation of majority carriers near surface (b) depletion of majority carriers from surface (c) inversion, accumulation of minority carriers near surface (26). VG = gate voltage Qq = gate charge xand xd = depletion widths and...

Schoppa, N. E., McCormack, K., Tanouye, M. A., and Sigworth, F. J. (1992). The size of gating charge in wild-type and mutant Shaker potassium channels. Science 255, 1712-1715. 

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