Abstract: An attenuator device is disclosed defined by an inner member having an outer cylindrical surface and a coaxial and relatively rotatable outer member having an inner cylindrical surface. Longitudinally extending grooves are defined in the respective surface of each member. Attenuating structure is disposed in the longitudinal length of the grooves of one of the members while bowed leaf springs are disposed in the longitudinal length of the grooves of the other member. The bowed leaf springs extend from the grooves of the other member to engage the grooves and attenuating structure of the one member to thus provide both detenting and grounding for the attenuator device.

Abstract: A voltage ratio doubler circuit comprising an input node maintained at a constant input voltage V.sub.IN ; an output node at an output voltage V.sub.OUT ; and means, coupled between the input node and the output node, for selectively determining the ratio V.sub.OUT /V.sub.IN to equal either (a) a value K' or (b) a value K'/2 determined by impedances in the doubler circuit. In a first embodiment of the invention, the impedance of the load placed at the output node is matched with the system impedance of the doubler circuit. In this first embodiment, the input impedance, and hence the level of V.sub.IN at the input node does not vary regardless of which voltage ratio is selected. In a second embodiment, the load impedance and doubler circuit system impedance do not match. In this second embodiment, a leveller means is included. The leveller means provides a reference voltage V.sub.REF which varies with changes in input impedance at the input node. The reference voltage V.sub.REF is used to maintain V.sub.