Chua's circuit equations form an autonomous dynamical system of three coupled first-order ordinary differential equations (Chua et al. 1993, Chua 2007). A dimensionless form is
 |  |  |
(1)
|
 |  |  |
(2)
|
 |  |  |
(3)
|
where 
, 
,
and 
are the state variables, primes denote derivatives
with respect to dimensionless time 
,
and 
and 
are positive parameters. The odd piecewise
linear function 
describes the circuit's nonlinear response,
 |
(4)
|
The slope of 
is 
for 
and 
for 
. The system is invariant under the simultaneous
sign change of 
, 
, and 
.
Its stationary states have the form 
with 
.
For suitable parameters, the system exhibits a double-scroll
attractor. A trajectory on it winds around two lobes in phase
space (Chua 2007).
