In Reply to: RE: Current Change posted by Triode_Kingdom on June 14, 2021 at 16:52:41:
" "(I1 - I2) * Rk = (Delta Vk)"Isn't this telling us that if I1and I2 are equal, so that the difference is 0, there will be no AC drive voltage at the cathode? "
No, because Rk is tending to infinity at the same time as (I1 - I2) is going to zero. The rate at which Rk goes to infinity exactly balances against the rate at which (I1 - I2) goes to zero, so that the product of the two gives the finite and non-zero quantity (Delta Vk).
It is maybe clearer to view it as the equation (I1 - I2) = (Delta Vk)/Rk,
so that ones sees that as Rk goes to infinity, while holding (Delta Vk) approximately fixed (finite and non-zero), then it implies (I1 - I2) goes to zero. This is the CCS limit, where I1 and I2 become equal.
Edits: 06/14/21
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: Current Change - cpotl 17:33:08 06/14/21 (6)
- RE: Current Change - Triode_Kingdom 22:18:40 06/14/21 (5)
- RE: Current Change - cpotl 05:21:17 06/15/21 (1)
- RE: Current Change - Triode_Kingdom 09:23:19 06/15/21 (0)
- RE: Current Change - PakProtector 04:35:34 06/15/21 (2)
- RE: Current Change - Triode_Kingdom 07:29:21 06/15/21 (1)
- RE: Current Change - PakProtector 17:56:37 06/16/21 (0)