improve bias tuning algorithm

[hartytp]

I've noticed that tuning the bias current often fails. It looks like the algorithm is converging, but gives up too soon. Running the tuning process again seems to resolve this...

Vgs = -2.100 V, Ids = 1.36 mA
Vgs = -2.079 V, Ids = 1.36 mA
Vgs = -2.059 V, Ids = 1.36 mA
Vgs = -2.040 V, Ids = 1.36 mA
Vgs = -2.020 V, Ids = 1.36 mA
Vgs = -2.000 V, Ids = 1.36 mA
Vgs = -1.980 V, Ids = 1.36 mA
Vgs = -1.959 V, Ids = 1.36 mA
Vgs = -1.939 V, Ids = 1.36 mA
Vgs = -1.920 V, Ids = 1.36 mA
Vgs = -1.900 V, Ids = 1.36 mA
Vgs = -1.880 V, Ids = 1.36 mA
Vgs = -1.859 V, Ids = 1.36 mA
Vgs = -1.839 V, Ids = 1.36 mA
Vgs = -1.820 V, Ids = 1.36 mA
Vgs = -1.800 V, Ids = 1.36 mA
Vgs = -1.780 V, Ids = 1.56 mA
Vgs = -1.760 V, Ids = 1.75 mA
Vgs = -1.739 V, Ids = 1.95 mA
Vgs = -1.719 V, Ids = 2.34 mA
Vgs = -1.700 V, Ids = 2.92 mA
Vgs = -1.680 V, Ids = 3.70 mA
Vgs = -1.660 V, Ids = 4.68 mA
Vgs = -1.640 V, Ids = 6.24 mA
Vgs = -1.619 V, Ids = 8.77 mA
Vgs = -1.599 V, Ids = 11.11 mA
Vgs = -1.580 V, Ids = 14.04 mA
Vgs = -1.560 V, Ids = 17.35 mA
Vgs = -1.540 V, Ids = 21.25 mA
Vgs = -1.519 V, Ids = 26.13 mA
Vgs = -1.499 V, Ids = 31.00 mA
Vgs = -1.479 V, Ids = 37.24 mA
Vgs = -1.460 V, Ids = 43.09 mA
Vgs = -1.440 V, Ids = 49.52 mA
Vgs = -1.420 V, Ids = 56.74 mA
Vgs = -1.420 V, Ids = 57.91 mA
Vgs = -1.422 V, Ids = 58.69 mA
Vgs = -1.423 V, Ids = 59.27 mA
Vgs = -1.424 V, Ids = 59.47 mA
Vgs = -1.424 V, Ids = 61.03 mA
Vgs = -1.425 V, Ids = 60.83 mA
Vgs = -1.427 V, Ids = 60.64 mA
Vgs = -1.428 V, Ids = 60.44 mA
Vgs = -1.428 V, Ids = 60.44 mA
Vgs = -1.429 V, Ids = 60.25 mA
Vgs = -1.431 V, Ids = 59.86 mA
Vgs = -1.432 V, Ids = 59.66 mA
Vgs = -1.432 V, Ids = 59.47 mA
Vgs = -1.433 V, Ids = 59.27 mA
Vgs = -1.435 V, Ids = 59.08 mA
Vgs = -1.436 V, Ids = 58.69 mA
Vgs = -1.436 V, Ids = 58.69 mA
Vgs = -1.437 V, Ids = 58.30 mA
Vgs = -1.439 V, Ids = 58.10 mA
Vgs = -1.440 V, Ids = 57.91 mA
Vgs = -1.441 V, Ids = 57.52 mA
Vgs = -1.441 V, Ids = 57.52 mA
Vgs = -1.443 V, Ids = 57.13 mA
Vgs = -1.444 V, Ids = 56.93 mA
Vgs = -1.445 V, Ids = 56.74 mA
Vgs = -1.445 V, Ids = 56.35 mA
Vgs = -1.447 V, Ids = 55.96 mA
Vgs = -1.448 V, Ids = 55.76 mA
Vgs = -1.449 V, Ids = 55.57 mA
Vgs = -1.449 V, Ids = 55.37 mA

[jordens]

Needs somebody with deep understanding of the hardware design to analyze, improve, test, debug, characterize, document, maintain etc an improved algorithm.