From thierry@marion.ief-paris-sud.fr Wed Jan 25 14:25:02 1995
Date: Wed, 25 Jan 95 17:38:17 +0100
From: Thierry Rochebois <thierry@marion.ief-paris-sud.fr>
To: bsanders@ncsa.uiuc.edu
Cc: analogue@magnus.acs.ohio-state.edu
Subject: CHUA's basic ASCII matics

Here is the basic ASCIImatic of CHUA's oscillator.
It shows you that CHUA's oscillator is not expensive !

If someone is interested I will send pointers to
postscript files.




CHUA'S OSCILLATOR it is made of a bandpass filter
                  and a negative non linear resistor

                 R
    +-----+----/\/\/-----+------+
    |     |              |      |
    |     |              |      \
    >    -+-            -+-     /
L   <    -+-            -+-     \  N  non linear negative Resistor
    >     | C2        C1 |      /   R
    |     |              |      |
    +-----+--------------+------+-- 0V

THE NON LINEAR NEGATIVE RESISTOR
N   is made of two parallel negative resistors like this one
 R
     o
     |
     |    R1
     +---/\/\---+
     |          |
     |  |\      |
     +--|+\     |
        |  >----+
     +--|-/     |
     |  |/      |
     |          |
     +---/\/\---+
     |    R2
     \
     /  R3
     \
     /
     |
     |   
     O