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Diffstat (limited to 'testsuite/vests/vhdl-ams/ashenden/compliant/analog-modeling/inline_11a.vhd')
-rw-r--r-- | testsuite/vests/vhdl-ams/ashenden/compliant/analog-modeling/inline_11a.vhd | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/testsuite/vests/vhdl-ams/ashenden/compliant/analog-modeling/inline_11a.vhd b/testsuite/vests/vhdl-ams/ashenden/compliant/analog-modeling/inline_11a.vhd new file mode 100644 index 000000000..67589bce6 --- /dev/null +++ b/testsuite/vests/vhdl-ams/ashenden/compliant/analog-modeling/inline_11a.vhd @@ -0,0 +1,98 @@ + +-- Copyright (C) 2002 Morgan Kaufmann Publishers, Inc + +-- This file is part of VESTs (Vhdl tESTs). + +-- VESTs is free software; you can redistribute it and/or modify it +-- under the terms of the GNU General Public License as published by the +-- Free Software Foundation; either version 2 of the License, or (at +-- your option) any later version. + +-- VESTs is distributed in the hope that it will be useful, but WITHOUT +-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +-- for more details. + +-- You should have received a copy of the GNU General Public License +-- along with VESTs; if not, write to the Free Software Foundation, +-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + +library ieee_proposed; use ieee_proposed.electrical_systems.all; + +entity inline_11a is + +end entity inline_11a; + + +architecture test of inline_11a is + + constant v_pos : voltage := 15.0; + constant v_neg : voltage := -15.0; + terminal input : electrical; + quantity v_in across input; + quantity v_amplified : voltage; + constant gain : real := 1.0; + + constant threshold_voltage : voltage := 0.6; + constant k : real := 0.0125; + terminal gate, source, drain : electrical; + quantity vds across ids through drain to source; + quantity vsd across source to drain; + quantity vgs across gate to source; + quantity vgd across gate to drain; + + constant r_charge : resistance := 10_000.0; + constant r_discharge : resistance := 10_000.0; + constant charging : boolean := true; + terminal cap, plus, minus : electrical; + quantity v_plus := 10.0 across plus; + quantity v_minus := 0.0 across minus; + quantity v_cap across cap; + quantity i_charge through plus to cap; + quantity i_discharge through cap to minus; + +begin + + -- code from book + + if v_in * gain > v_pos use -- incorrect + v_amplified == v_pos; + elsif v_in * gain < v_neg use -- incorrect + v_amplified == v_neg; + else + v_amplified == gain * v_in; + end use; + + -- + + if vds'above(0.0) use -- transistor is forward biased + if not vgs'above(threshold_voltage) use -- cutoff region + ids == 0.0; + elsif vds'above(vgs - threshold_voltage) use -- saturation region + ids == 0.5 * k * (vgs - threshold_voltage)**2; + else -- linear/triode region + ids == k * (vgs - threshold_voltage - 0.5*vds) * vds; + end use; + else -- transistor is reverse biased + if not vgd 'above(threshold_voltage) use -- cutoff region + ids == 0.0; + elsif vsd'above(vgd - threshold_voltage) use -- saturation region + ids == -0.5 * k * (vgd - threshold_voltage)**2; + else -- linear/triode region + ids == -k * (vgd - threshold_voltage - 0.5*vsd) * vsd; + end use; + end use; + + -- + + if charging use + i_charge == ( v_plus - v_cap ) / r_charge; + i_discharge == 0.0; + else + i_charge == 0.0; + i_discharge == ( v_cap - v_minus ) / r_discharge; + end use; + + -- end code from book + +end architecture test; |