Abstract: A digital signal generator includes an input unit configured to receive signal information of a target data signal, a controller configured to calculate at least two delay values and at least two data values, the at least two delay values and the at least two data values being used to generate a data signal corresponding to the signal information input through the input unit, a multi-phase clock generator configured to delay a reference clock signal based on the at least two delay values to generate at least two clock signals having different phases, a signal generator configured to generate at least two data signals by assigning the at least two data values to the at least two clock signals, and a logic gate unit configured to generate the data signal corresponding to the signal information input through the input unit based on the at least two data signals.

Abstract: A protective carrier for compact disk (CD) or digital video disk (DVD) that is constructed of a folded single sheet of standard 8½×11-inch or A4-size paper or lightweight paperboard. The process of forming a CD carrier is accomplished in six folds. The first two folds are made inward along the longitudinal axis using fold lines (12) (18) to form two side edge portions (42) (46) and one central portion (47). Next, ear portions (48) (50) are folded inward at one end of the sheet along angular fold lines (22) (24). Next, a flap portion (52) is created by folding from the same end inward along the upper transverse fold line (14). Finally, a divisional fold is made inward along the lower transverse fold line (16). This results in an upper divisional portion (56) and a lower divisional portion (58). The top of the resulting lower divisional portion (58) aligns to approximately 1 millimeter lower than the upper transverse edge (54).

Abstract: An electrical continuity tester employing two test probe assemblies (10) (12), one of which employs a conductive brush tip (26) at one end and a solid pointed tip (14) at the other. The brush tip of the probe allows rapid localization of continuity by sweeping the area to be tested with the brush tip of the probe until an audible tone or visual indication occurs. Conducting a point-to-point search within the area previously identified by the brush tip identifies the actual point of continuity. The solid pointed tip of the same probe accomplishes this task. To reduce risk of damage to the circuit under test, the tester applies less than 1 volt through the test probes. The tester employs a pulse stretching circuit to electrically stretch the pulse generated by a successful continuity event to a minimum duration so that even very brief contact duration made by the probes between two points of electrical continuity will result in a clearly audible tone or visual indication.