Apparatus, methods and articles of manufacture for multiband transmitter power amplification are provided wherein one or more amplifying devices, of which at least one may be one or more current sources, have impedances matched for different input and output frequencies by way of various impedance matching circuits. The present invention, in one embodiment, features a curved rim extending around a mounting plate to which an object or an object carrier can be attached. The time for applying the intermediate voltage at a timing of ejecting the ink from the nozzles is shorter than the time for applying the intermediate voltage to the actuator at other timings. When a signal received at the receiver includes a large interfering signal component, the gain of the baseband amplifier is reduced to lessen the possibility that the amplified signal become saturated.