Small MOSFET input capacitance.
On Wed, 1 Sep 2010 15:00:35 +0100, "ian field"
wrote:
Does a source follower present lower apparent input capacitance?
I'm thinking in terms of 2N7000/BS170 sized devices.
Thanks.
Yes. If the follower voltage gain is close to 1, the gate-source
capacitance is bootstrapped and goes away. All that's left is
drain-gate capacitance. You can bootstrap that, too, with another
follower.
John
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