Abstract: An integrated structure of an inkjet head and an antenna includes a metal heat dissipation board, a flexible (or rigid) circuit board and an antenna module. The metal heat dissipation has an elongated printing ribbon. The flexible (or rigid) circuit board is mounted on the metal heat dissipation board, and has one end electrically connected with the printing ribbon and the other end having a plurality of parallel circuits mounted thereon and connected to external control circuits. The antenna module is directly mounted on and electrically connected with the flexible (or rigid) circuit board. Given the integrated structure, the antenna module is effectively mounted on the inkjet head to reduce the size of the structure and lower the cost thereof.

Abstract: A power control circuit of a variable-frequency opto-interrupter for a printer has a plurality of impedances electrically connected with a receiving terminal of the opto-interrupter in parallel for multi-stage variable adjustment, an IR photodiode having stronger penetration and adopted to a transmitting terminal, and a variable frequency generator generating variable frequency signal and electrically connected with a negative pole pin of the IR photodiode through a switching transistor. Accordingly, the emitting intensity of the opto-interrupter is significantly enhanced so that various printing media are penetrated through by infrared beams and the emitting intensity is adjusted to adapt to acquire a broader dynamic range of the load of the receiving terminal.

Abstract: A general winding and feeding apparatus includes a rotating shaft on the upper side of a standing wall of a base, and a motor is connected to the rotating shaft in the standing wall. A swing arm extends across a traveling material and is situated at a suitable position on the standing wall. Digital variable frequency methods may be used to drive the motor, which operates in conjunction with light-coupled sensors to detect the traveling speed of a material on the swing arm and sense a swing position of the swing arm. Feedback is generated in real-time to modify the speed of the motor, and the constant speed travel of the material can be achieved while being either wound or unwound.

Abstract: A general winding and feeding apparatus includes a rotating shaft on the upper side of a standing wall of a base, and a motor is connected to the rotating shaft in the standing wall. A swing arm extends across a traveling material and is situated at a suitable position on the standing wall. Digital variable frequency methods may be used to drive the motor, which operates in conjunction with light-coupled sensors to detect the traveling speed of a material on the swing arm and sense a swing position of the swing arm. Feedback is generated in real-time to modify the speed of the motor, and the constant speed travel of the material can be achieved while being either wound or unwound.

Abstract: A power supply structure of printer has a power supply circuit outputting regular power for printing, and an auxiliary charging circuit having a plurality of farad grade super capacitors collaborated with a voltage-stabilized charging loop to supply power with high transient power and to maintain normal operation of the printer. Given the power structure, the power supply circuit is simplified to reduce the building cost thereof, and the energy waste in operation is effectively lowered, so as to sufficiently provide high transient power and deliver better printing result.

Abstract: A power control circuit of a variable-frequency opto-interrupter for a printer has a plurality of impedances electrically connected with a receiving terminal of the opto-interrupter in parallel for multi-stage variable adjustment, an IR photodiode having stronger penetration and adopted to a transmitting terminal, and a variable frequency generator generating variable frequency signal and electrically connected with a negative pole pin of the IR photodiode through a switching transistor. Accordingly, the emitting intensity of the opto-interrupter is significantly enhanced so that various printing media are penetrated through by infrared beams and the emitting intensity is adjusted to adapt to acquire a broader dynamic range of the load of the receiving terminal.

Abstract: An integrated structure of an inkjet head and an antenna includes a metal heat dissipation board, a flexible (or rigid) circuit board and an antenna module. The metal heat dissipation has an elongated printing ribbon. The flexible (or rigid) circuit board is mounted on the metal heat dissipation board, and has one end electrically connected with the printing ribbon and the other end having a plurality of parallel circuits mounted thereon and connected to external control circuits. The antenna module is directly mounted on and electrically connected with the flexible (or rigid) circuit board. Given the integrated structure, the antenna module is effectively mounted on the inkjet head to reduce the size of the structure and lower the cost thereof.

Abstract: A power control circuit of photo coupler mainly includes a plurality of impedances having one end connected in parallel with a pin of a photo coupler and the other end connected with a relative control pin of an integrated circuit, in which the values of the plural impedances are chosen in a class-by-class pattern on a basis of impedance value to increase or decrease a total impedance value class by class in a range by varying a high impedance or low output via the relative control pin of the IC. As such, the combined circuit is simplified and practical and achieves an effect taking cost and precise adjustment into account to possess digital adjustment of impedance range without spending a lot.

Abstract: A filter is disclosed for filtering 2B1Q coded symbols from the set (-3, -1, +1, +3) to obtain convolutions of the form ##EQU1## without any multiplications by three. The convolution is obtained by using two accumulators to separately accumulate coefficients a.sub.j where the corresponding symbol has a magnitude one and where the corresponding symbol has a magnitude three.