Middlebrook Criteria

DESIGN PHASE:       analysis
SUB ELEMENT NAME:   middlebrook criteria
VARIABLE NAME:      [HEAMC]
DATE:               REVISION LETTER:    REVISION DATE:   
APPLICABILITY:      feedback circuit and regulator circuit

ACTIVITY:  Compute open loop input impedance of input regulator
and output impedance of input filter and plot on same graph.

OUTPUT:  Plot to demonstrate that Middlebrook stability criteria
(MIL-HDBK-241B, Appendix B) is met.

ALGORITHM:

[HEAMC] =           engineer hours for Middlebrook Criteria
0.0+                set up time
0.0*                time per part
[PART COUNT]        circuit parts count

DISCUSSION:  Assumes open loop input impedance of regulator and
output impedance of input filter is computed at worse case
conditions of low line and maximum load using Spice ac analysis
or similar program.  Part of set up time is to code and run input
filter.

Author: Jerrold Foutz, foutz@smpstech.com

Original: Foutz, J., Power Supply Circuit Development Estimating Aid - An Expert System Application, IEEE Applied Power Electronics Conference Record, New Orleans, February 1-5, 1988. Revised 22 February 2001