Abstract: A multi-tap Differential Feedforward Equalizer (DFFE) configuration with both precursor and postcursor taps is provided. The DFFE has reduced noise and/or crosstalk characteristics when compared to a Feedforward Equalizer (FFE) since DFFE uses decision outputs of slicers as inputs to a finite impulse response (FIR) unlike FFE which uses actual analog signal inputs. The digital outputs of the tentative decision slicers are multiplied with tap coefficients to reduce noise. Further, since digital outputs are used as the multiplier inputs, the multipliers effectively work as adders which are less complex to implement. The decisions at the outputs of the tentative decision slicers are tentative and are used in a FIR filter to equalize the signal; the equalized signal may be provided as input to the next stage slicers. The bit-error-rate (BER) of the final stage decisions are lower or better than the BER of the previous stage tentative decisions.

Abstract: The invention discloses a lock device. The lock device is used for detachably mounting a cover on a base. A recess is formed on the cover. A first hole is formed on the bottom of the recess, and a first retainer is extended out of the bottom of the recess. The lock device includes a first sliding member, a first elastomer, and a second sliding member. A column which is capable of passing through the first hole is formed on the first sliding member. A second retainer which is used for the first retainer to lock is formed on the second sliding member. When the first sliding member slides toward the base along a first axle, the column pushes the second retainer to make the second sliding member slide toward a second axle, so as to make the second retainer separate from the first retainer.

Abstract: A hard disk drive holding apparatus comprising a support, positioning pins, securing pins and swivel arms. The support comprises a supporting surface and side panels. The side panels have holes located thereon and are erected on the supporting surface. The positioning pins are located on the supporting surface to be inserted into the positioning holes on the bottom of the hard disk drive. The securing pins pass through the holes on the side panels and engage into the securing holes on the sides of the hard disk drive. The swivel arms are attached to the securing pins and pivotally connected on the support.

Abstract: The invention discloses a lock device. The lock device is used for detachably mounting a cover on a base. A recess is formed on the cover. A first hole is formed on the bottom of the recess, and a first retainer is extended out of the bottom of the recess. The lock device includes a first sliding member, a first elastomer, and a second sliding member. A column which is capable of passing through the first hole is formed on the first sliding member. A second retainer which is used for the first retainer to lock is formed on the second sliding member. When the first sliding member slides toward the base along a first axle, the column pushes the second retainer to make the second sliding member slide toward a second axle, so as to make the second retainer separate from the first retainer.

Abstract: A hard disk drive holding apparatus comprising a support, positioning pins, securing pins and swivel arms. The support comprises a supporting surface and side panels. The side panels have holes located thereon and are erected on the supporting surface. The positioning pins are located on the supporting surface to be inserted into the positioning holes on the bottom of the hard disk drive. The securing pins pass through the holes on the side panels and engage into the securing holes on the sides of the hard disk drive. The swivel arms are attached to the securing pins and pivotally connected on the support.

Abstract: A heat sink protecting retention module is described. The heat sink protecting retention module has a main frame, protective feet, hooks, and a positioning mechanism. The protective feet are disposed under the main frame to keep screws therein before the heat sink protecting retention module is installed on the motherboard so as to avoid scratching the motherboard or damaging electric components thereon. The hooks are disposed on the main frame for clamping the heat sink and the positioning mechanism are disposed around and under the main frame for aligning the heat sink protecting retention module to a central processing unit socket.

Abstract: A heat sink protecting retention module is described. The heat sink protecting retention module has a main frame, protective feet, hooks, and a positioning mechanism. The protective feet are disposed under the main frame to keep screws therein before the heat sink protecting retention module is installed on the motherboard so as to avoid scratching the motherboard or damaging electric components thereon. The hooks are disposed on the main frame for clamping the heat sink and the positioning mechanism are disposed around and under the main frame for aligning the heat sink protecting retention module to a central processing unit socket.