One embodiment is directed to synthesizing code fragments in a software routine using known inputs and corresponding expected outputs. The control gate 18 is buried in the semiconductor substrate 10, which makes it unnecessary to form the control gate 18 on the floating gate electrode 20. The step-up converter circuit dynamically increases the direct voltage to the value currently required in the network and in the process temporarily supplies an approximately sinusoidal voltage curve for the intermediate circuit voltage. The floor rail supports one or more of the wall panels. The arylene or heteroarylene polymer comprises structural units of the formula III.