Abstract: A differential pair signal lines matching circuit includes a pair of differential pair signal lines coupled to a receiver, a first terminal resistor, a second terminal resistor, and a capacitor. The first terminal resistor is coupled at one end to one of the differential pair signal lines near the receiver. The second terminal resistor is coupled at one end to another one of the differential pair signal lines near the receiver. The capacitor is coupled between the other ends of the first terminal resistor and the second terminal resistor. The differential pair matching circuit eliminates noise and non-monotonic glitches of a signal transmitted on differential pair signal lines without influencing a signal voltage thereof.

Abstract: An exemplary low noise blower fan includes a base plate for supporting a rotating shaft and a bearing. The shaft is rotated in the bearing. A vibration damping pad is attached to the base plate. The pad is made of damping material. Accordingly, vibration caused by the base plate can be damped by the pad, whereby noise of the fan is suppressed.

Abstract: An objective lens actuator includes a base, a suspension apparatus mounted on the base, a holder for holding an objective lens, the holder suspended by the suspension apparatus, and a voice coil motor (VCM) driving the holder to vibrate, wherein the VCM includes a pair of yokes, each of the pair of yokes includes a first part and a second part, the first part and the second part are joined in a generally rectangular shape. The objective lens actuator can form an even magnetic field Allowing very precise focusing of a lens.

Abstract: An objective lens actuator includes a base, a suspension apparatus mounted on the base, a holder for holding an objective lens, the holder suspended by the suspension apparatus, and a voice coil motor (VCM) driving the holder to vibrate, wherein the VCM comprises a pair of U-shaped yokes, one sidewall of each of the yokes is defined an aperture in a center. The objective lens actuator can form a uniform magnetic field so that it can have a very precision of focusing the laser light at a correct track. That is to say a pickup having the objective lens actuator can very accurately write or read information of memories.