This invention provides a method of treating a subject suffering from a GABA related disorder comprising periodically administering to the subject an effective amount of laquinimod or pharmaceutically acceptable salt thereof in an amount effective to treat the subject. The high voltage semiconductor device includes a tow voltage region, a high voltage region, and a high breakdown voltage isolation region. Coefficients for predictive coding are stored in a prediction coefficient storage section. The second signal layer includes a second transmitter circuit region and a second receiver circuit region. When operating below saturation, the carrier amplifier delivers power to a load of 2R and the carrier amplifier delivers current to the load, which is one-half the current at maximum power when the amplifier is saturated.