Abstract: Microelectromechanical systems (MEMS) switches are disclosed. Parallel configurations of back-to-back MEMS switches are disclosed in some embodiments. An isolation connection of constant electrical potential may be made to a midpoint of the back-to-back switches. In some embodiments, a separate MEMS switch is provided as a shunt switch for the main MEMS switch. MEMS switch device configurations having multiple switchable signal paths each coupling a common input electrode to a respective output electrode are also disclosed. The MEMS switch device includes shunt switches each coupling a respective output electrode to a reference potential. The presence of a shunt switch coupled to an output electrode enhances the isolation of the signal path corresponding to that output electrode when the path is open.

Abstract: Impedance paths for integrated circuits having microelectromechanical systems (MEMS) switches that allow for electrical charge to bleed from circuit nodes to fixed electric potentials (e.g., ground) are described. Such paths are referred to herein as charge bleed circuits. The circuit nodes may be circuit locations where electrical charge may accumulate because there is no other path for the electrical charge to dissipate. In some embodiments, a charge bleed circuit includes a switchable device (e.g., a MEMS switch, a solid-state device switch, or a circuit including various solid-state device switches that, collectively, implement a device that can be switched on and off) that connects and disconnects the impedance path from a circuit node. This may allow the device to perform different types of measurements at desired performance levels.

Abstract: A vehicle accessory assembly is disclosed for mounting on an interior panel, such as on a visor, for example, and includes an accessory devce, such as a vanity mirror assembly, interconnected with the visor or other vehicle panel at a generally fixed location thereon. A preferred laterally sliding accessory door is interconnected with the visor or other interior panel for selective lateral movement between a closed position wherein the accessory device is substantially covered and an open position wherein the accessory device is substantially exposed. Preferably, a switch is provided for electrically energizing a light or other electrical component in response to movement of the accessory door from its closed to its open position, and a manually operable override feature is also preferably provided in the event that the user wishes to disable the switch and prevent such energization in response to the opening movement of the door.