VBIC 1.1

DC Current

If the backward compatibility flag imeltrci=no (the default value), K_bci and K_bcx are calculated as follows:

If imeltrci=yes, K_bci and K_bcx are limited.

Charge Equations

If A_j > 0, Q_j(C_j, P, M, A_j, V) is calculated as

If A_j ≤ 0, Q_j(C_j, P, M, A_j, V) is calculated as

otherwise

Excess Phase

In an actual device, the measured phase shift is often larger than the shift predicted by the lumped model. The excess-phase parameter td accounts for this extra phase shift at high frequencies. An all-pass, second-order Bessel function filter creates this extra phase shift. The frequency response of this filter is

where

and the phase shift due to this filter is

The Bessel filter is implemented with the excess phase network shown below.

where and .

Small Signal Parameters

If Rci is given,

where

and tf is the model parameter.

If Rci is not given,

Temperature Equations

Noise Equations

I_be shot and flicker noises:

R_cx thermal noise:

R_ci thermal noise:

R_bx thermal noise:

R_bi thermal noise:

R_e thermal noise:

R_s thermal noise:

I_ccp shot noise:

I_bep shot and flicker noises:

R_bp thermal noise:

Related Topics

VBIC Model (vbic)

VBIC 1.2

Component Statements

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