---------------------------------


			RC - FILTERS V 1.1


			  March 11, 1993


		 programming: Wim Van den Broeck

		---------------------------------



Preface
=======

This program is the first in a row of electronic-applications,
if you have suggestions or remarks about the program you can contact
the author:

	Van den Broeck Wim
	Watertorenstraat 66
	B-2560 Nijlen
	BELGIUM

Filters 1.1 requires AmigaDOS Release 2(Kickstart & Workbench 2.0) or
higher to run.

This program is SHAREWARE, it may be freely distributed without costs
but if you want to support me in developping better software please
send me 10$. thanks.

	

Contents
========

1. Introduction

2. The purpose of filters 1.1

3. How to use

4. Bugs fixed

5. Machine used


1. Introduction
===============

	Filters 1.1 is based on the study-material of H.I.K. BELGIUM.
The author is a senior-student at the college: 2d year, Electronics option
Microprocessors.

	All the formulas included are complete and there where no 
shortcuts taken !!!  


2. The purpose of filters 1.1
=============================

	Filters 1.1 can be used by anyone who is in the electronic-
business and must develop a network of RC-filters wich by meaning: 
including or excluding certain High- or Low-frequences.
 
	As soon as possible I will update the software including 
printing the functions and saving it as IFF-standard.
(look out for filters 1.2 !!!)


3. How to use
=============

	To enter a value you click on the value-gadget, ENTER, than the
	EXP-gadget will be activated.

	If you want to enter more than one value use the TAB key to 
	jump to the next gadget !!!


a.network
---------
	Network allows you to select a High-pass network or a Low-
	pass network. The difference is the place of R and C (they
	switch).

	High-pass : High frequences may pass
	Low-pass  : Low frequences may pass


b.plot
------
	There are two functions with each network: amplitude-plot and 
	phase-plot. 

	Amplitude-plot : gives you the amplification-values that comes
			 with each frequency (dB).

	Phase-plot     : gives you the phase-transfer (degrees).


c.frequency limits 
------------------
	If you don't know the meaning of this box, you better go on 
	and play "Lemmings 2".

d.rc values
-----------
	All the values are split in two parts, the EXP means 
	multiplied with 10 power -> ?? .

	example: 10,000 Ohm

	can be	 	10 EXP 3
	or    	       100 EXP 2
	or 	     10000 EXP 0

e.calculate
-----------
	This option lets you calculate the values of Ampl and Phase 
	for a 'specific' frequency.

	The values will update each time you ENTER a new value in one
	of the gadgets.
			


4. Bugs fixed
=============

	bug #01: A zero phase over the whole range wasn't possible in 
		 filters 1.0, there was a system-crash.


	If you find any bugs, please let me know so I can fix them.



5. Machine used
===============

	Filters 1.0 was created using:

	Commodore Amiga 4000/040
	FPU, MMU, Workbench 3.0, 6 Mb ram.


	if you have any problems using the program on other 
	systems please let me know !



-RC -filters 1.0 - written by Wim Van den Broeck (thanks to Luc De Keyser 
			for the beta-testing and suggestions for the 
			program. Also thanks to ir. F. De Schutter for
			the lecture and documentation, further thanks to
			Wim Van Goethem for his books and his source code). 


(c) 1993 Van den Broeck Wim.



"Sing your life, any fool can think up words that rhyme ..." (c)Morrissey



Thanks to the commodore AMIGA for being the best computer ever !!!

Intel stinks, AMIGA rules.


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