Abstract: Various RF plasma systems are disclosed that do not require a matching network. In some embodiments, the RF plasma system includes an energy storage capacitor; a switching circuit coupled with the energy storage capacitor, the switching circuit producing a plurality of pulses with a pulse amplitude and a pulse frequency, the pulse amplitude being greater than 100 volts; a resonant circuit coupled with the switching circuit. In some embodiments, the resonant circuit includes: a transformer having a primary side and a secondary side; and at least one of a capacitor, an inductor, and a resistor. In some embodiments, the resonant circuit having a resonant frequency substantially equal to the pulse frequency, and the resonant circuit increases the pulse amplitude to a voltage greater than 2 kV.

Abstract: A honing machine (100) for honing rotationally symmetrical bore holes in workpieces has a honing spindle (120), which is movably mounted in a spindle housing (130), is rotatable about a spindle axis (122) by means of a rotary drive (140), can be driven in an oscillating manner parallel to the spindle axis by means of a lifting drive (150) and has at a tool-side end means for securing a honing tool arrangement (200), which has a tool body (220) carrying at least one honing element, which by axial displacement of a tool-side expanding element (330) that is axially displaceable inside the tool body can be infed radially in relation to a tool axis (214) and can be pressed by a pressing force against an inner side of a bore hole to be machined.

Abstract: MUX and DEMUX circuits using a photo gate transistor having a pair of thin film electrodes respectively serving as emission and collector electrodes. When photons with at least critical energy are irradiated onto the emission electrode, electrons are emitted from the emission electrode, so that the associated photo gate transistor can carry out a gating operation. The MUX circuit divides a plurality of electrical signals in a time division manner so that the transmission of those signals can be carried out through a single transmission line. The DEMUX circuit recovers an original signal from signals transmitted in a time division manner via a single transmission line. Input signals are received to emission electrodes while being limited in voltage level by input resistor pairs. An optical source irradiates photons to an emission electrode in sync with the application of an input signal. By the irradiation of photons, the emission electrode emits electrons which are transmitted to a collector electrode.