home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Educational Software Cooperative 4
/
Educational Software Cooperative 4.iso
/
dc
/
whatsnew.doc
< prev
Wrap
Text File
|
1995-03-10
|
3KB
|
89 lines
DC CIRCUIT ANALYSIS
WHAT IS NEW
Version 1.4 - March 1995
------------------------
Replaced the Select Sample Circuit menu with an improved file
manager that supports changing directories and drives.
Modified CMOS and DTL Exclusive OR in the library to use four
NAND gates. This modification results in fewer components to
analyze.
Editorial changes were made to the documentation and online
tutor.
Version 1.3 - March 1994
------------------------
This program requires a 286 or later microprocessor.
Display the filename in the Analyze and Modify screens.
The Select Sample Circuit menu will automatically execute Analyze
after selecting a sample circuit.
Modified the calculation to use a double precision matrix of
simultaneous equations resulting in a more accurate calculation.
The convergence criterion is between 1.0e-8 and 1.0e-10 Volts.
Modified the P-N junction calculation to use an exponential
increase in current. This eliminates the overshoot of the
threshold voltage in previous versions and results in a more
realistic answer. This change modified the parameters in the
DC.DCL library.
Replaced Darlington in the library with IC containing two
transistors. Previous versions of this program improperly
calculated circuits containing darlingtons.
Added Schottky diodes to library, and replaced conventional
diodes with Schottky diodes where appropriate.
Added Low-Power Schottky sample circuits for AND, NAND, OR, NOR,
and 3-State gates. Also added, Schottky Diode sample circuit.
Corrected overload check to decide if current passing through the
collector-emitter junction of bipolar transistors is overloaded.
Added 47K output resistors to all ECL ICs in the library.
Modified various sample circuits, including SSSW, SSPOWSW,
SSRPOWSW.
Version 1.2 - June 1993
-----------------------
Added an online tutorial that has Hyper-Text like features.
Tutorial is accessed using the F5 key.
Changed the Opening Menu to replace:
Save and Continue
Exit without Saving
Save and Exit
with
Save Circuit As
Save Circuit
Exit
Added the F6 command to switch between Analyze Circuit and Modify
Circuit.
Compressed the graphics' library file and renamed it from DC.LIB
to DC.IC.
Version 1.1a - May 1993
-----------------------
Corrected a bug in the potentiometer calculation that did not
affect any of the sample problems.