Abstract: A system for plating resonator electrodes or the like by the vapor deposition process employs one or more shutters between the deposition material source and a plating mask. At least one of the shutters has a pair of apertures aligned with different apertures in the plating mark. In one embodiment comprising a two shutter, four position system, the two shutters may be positioned such that either, both or neither of the resonators can be plated. Because each shutter is either ON or OFF, a simple binary analogy for control of the shutters results.

Abstract: A circuit is provided which is capable of band switching a voltage controlled oscillator (VCO) while maintaining the relative sensitivity of the voltage controlled device and, hence, the control line voltage itself. The circuit includes an array of capacitors, including a pair of capacitors and a voltage variable capacitor (varactor), a switch, and a tuning coil. When the switch is in the open position, the pair of capacitors are connected in parallel with the varactor. When the switch is closed, the pair of capacitors are connected to ground, arraying themselves on opposite sides of the varactor. In this closed position, the overall capacitance of the tuned circuit increased, thus lowering the tuned frequency of the circuit. Since the switched capacitance (i.e., the capacitance which changes the tuned frequency of the circuit) is arrayed on both sides of the varactor, the varactor maintains its relative sensitivity.

Abstract: An arrangement for externally programming a radio upon proper identification under microcomputer control using fixed and transient memories without removing or adding circuit modules to the radio.