Abstract: A preamplifier comprises an input stage and a capacitive coupling stage. The input stage is arranged to receive a differential signal from a magnetic resistor which indicates a magnetic field sensed on a magnetic disk of a hard disk drive (HDD) when the preamplifier is powered on from an off state. The capacitive coupling stage has an input arranged to receive the differential signal from the input stage, a filter comprising a first resistor, a second resistor, a first capacitor, a second capacitor, and switches arranged in parallel with respective resistors, where the switches are closed when the preamplifier is powered on from the off state to an on state. A switch control is arranged to determine that an offset of the differential signal has settled and open the switches based on the determination.

Abstract: A preamplifier comprises an input stage and a capacitive coupling stage. The input stage is arranged to receive a differential signal from a magnetic resistor which indicates a magnetic field sensed on a magnetic disk of a hard disk drive (HDD) when the preamplifier is powered on from an off state. The capacitive coupling stage has an input arranged to receive the differential signal from the input stage, a filter comprising a first resistor, a second resistor, a first capacitor, a second capacitor, and switches arranged in parallel with respective resistors, where the switches are closed when the preamplifier is powered on from the off state to an on state. A switch control is arranged to determine that an offset of the differential signal has settled and open the switches based on the determination.

Abstract: A housing for a scroll compressor and a scroll compressor are provided. The housing includes: a cannular central part; a center hole disposed at the cannular central part; a plurality of arms substantially extending radially from the cannular central part, the plurality of arms being used to be connected with a fixed scroll of the scroll compressor; and a thrust bearing surface disposed on a first side of the cannular central part in an axial direction, the thrust bearing surface being used to support an orbiting scroll. The orbiting scroll is supported with low friction, the motor supporting shell tube and the fixed scroll are connected with better alignment, and materials and machining costs are saved. In addition, the housing can provide better support for a scroll set, thereby achieving better performance.

Abstract: A scroll compressor includes a shell; an orbiting scroll; a fixed scroll, the orbiting scroll and the fixed scroll forming a compression component; a housing, configured to support the fixed scroll, with a gas passage throughout the housing and leading to the compression component; a motor below the housing, including: a rotor; a stator; a drive shaft connected with the orbiting scroll; a motor supporting shell tube, wherein the tube is in the shell, an upper end of the tube is connected with the housing, and the rotor and the stator are in the tube; a first suction inlet, at a lower portion of the shell; a second suction inlet, at a lower portion of the motor tube; and a first passage formed by a gap between the shell and the tube, gas from the first suction inlet entering the compression component through the gas passage along the first passage.

Abstract: A housing for a scroll compressor and a scroll compressor are provided. The housing includes: a cannular central part; a center hole disposed at the cannular central part; a plurality of arms substantially extending radially from the cannular central part, the plurality of arms being used to be connected with a fixed scroll of the scroll compressor; and a thrust bearing surface disposed on a first side of the cannular central part in an axial direction, the thrust bearing surface being used to support an orbiting scroll. The orbiting scroll is supported with low friction, the motor supporting shell tube and the fixed scroll are connected with better alignment, and materials and machining costs are saved. In addition, the housing can provide better support for a scroll set, thereby achieving better performance.

Abstract: The presently disclosed embodiments are directed to layers that are useful in imaging apparatus members and components, for use in electrostatographic, including digital, apparatuses. More particularly, the present embodiments provide a robust undercoat layer comprising TiSi in which the TiO2 to SiO2 ratio falls in a particular ratio range discovered to reduce both plywood print defects as well as abnormal operating parameters and print defects from micro-cracks in the undercoat layer, and methods for making the same.

Abstract: The presently disclosed embodiments are directed to layers that are useful in imaging apparatus members and components, for use in electrostatographic, including digital, apparatuses. More particularly, the present embodiments provide a robust undercoat layer comprising TiSi in which the TiO2 to SiO2 ratio falls in a particular ratio range discovered to reduce both plywood print defects as well as abnormal operating parameters and print defects from micro-cracks in the undercoat layer, and methods for making the same.