Abstract: A pop-up electronic device has a keypad and display module arranged for slideable engagement with an outer cover wherein the keys of the keypad are nested within the outer cover in the device fully closed position and are exposed in the device fully open position. A protective window is in an overlapping relationship with the display in the device fully closed position and non-overlapping relationship with the display in the device fully open position to allow contact with and direct viewing of the display screen surface. The keypad and display module and protective window are mechanically arranged such that movement of the protective window in one direction causes the module to move in an opposite direction to change the electronic device between device fully open and fully closed positions.

Abstract: Parallel working additive scramblers produce a predetermined pseudorandom sequence of length L in a word generator, which consists of an N-stage shift register. To obtain more than N parallel located pseudorandom sequences, the word generator is connected to a network in which, in addition to the pseudorandom sequences created by modulo-2 addition, other pseudorandom sequences are created with a different phase relation. Performing the linkage operations limits the maximum bit rate sequence that can be transmitted. The entire pseudorandom sequence is stored in a memory (S). The desired pseudorandom sequence is produced in a circular storage (RS) by means of shifting operations. The circular storage (RS) is in the form of a feedback shift register (SR) and is used as the memory (S), in which each of the outputs is connected to an input of an EXOR-gate, in which a pseudorandom sequence is modulo-2 added with a partial stream of a parallelized serial data stream.