A variable power distributor capable of calculating an error between transmission lines of two systems after building a variable power distributor and correcting the set value of the amplitude and the phase according to the error, an error detection method for the variable power distributor, and a set value correction method is provided. The transmitter further includes a temperature sensor for detecting the temperature of said transmitter, and a temperature correction circuit, including a look-up table, responsive to said temperature sensor, for adjusting said projection arrangement in dependence upon offset grade values that are stored in said look-up table for a plurality of transmitter temperatures. Because of the characteristics of stable frequency, high resolution and linearity, VAM is broadly used in the control of luminance of discharge tubes, such as TFT-LCD TVs, LCD monitors and advertisement lamps. The method additionally includes providing a content dependent module, the content dependent module being associated with the subsystem and is configured interact with the subsystem in a content-dependent manner. The use of the low-pressure gas phase doping reduces process costs and improves capacitor properties. The ferroelectric capacitor, among other elements, includes a substantially planar ferroelectric dielectric layer located over a first electrode layer, wherein the substantially planar ferroelectric dielectric layer has an average surface roughness of less than about 4 nm.