Abstract: Embodiments of the present invention provide a remote electrical tilt unit, a base station, and a method for managing a remote electrical tilt antenna. The method includes: receiving, by the remote electrical tilt unit, permission configuration information sent by a first base station through a group of AISG ports of the remote control unit; configuring management permission of the first base station on the remote electrical tilt unit according to the permission configuration information, where the management permission includes at least control permission and query permission, and control permission on the remote electrical tilt unit can be allocated to only one base station. In this way, multiple base stations jointly manage a remote electrical tilt unit in a remote electrical tilt antenna, and a problem that it is difficult to locate and troubleshoot a fault when configuration of the remote electrical tilt unit is incorrect is resolved.

Abstract: Herein is provided a recombinant lentiviral vector preparation, in which the preparation comprises: a) an effective dose of the recombinant lentiviral vector; b) a histidine hydrochloride buffer for keeping a pH value of the preparation in the range of 6.0-8.0; and c) a carbohydrate.

Abstract: A method is provided for improving clock recovery signal jitter in digital communication based on a phase adjustment technique in a phase interpolation. A clock signal is expressed as the combination of two sinusoidal signals. The phase interpolating process determines the amplitude of the first sinusoidal signal, and the amplitude of the second sinusoidal signal that is 90° out of phase from the first sinusoidal signal. The clock signal is then formed by combining first sinusoidal signal with the second sinusoidal signal by choosing the first and second amplitude such that the amplitude of the clock signal is substantially a constant. Modulation of the clock signal amplitude is significantly improved by the disclosed technique over the conventional technique when the sum of the first and second amplitudes of the two sinusoidal functions is kept a constant.

Abstract: A switch circuit is provided. The switch circuit may include a first transistor having a source terminal to accept an input signal, a drain terminal to provide an output signal, and a gate; a power supply providing a gate voltage. The switch circuit may also include a circuit to couple a switch signal to the gate, wherein the circuit turns the first transistor ‘off’ for all values of the input signal when the switch signal is ‘low.’ A programmable gain amplifier (PGA) is also provided. The PGA may include an input stage having an input node to couple an input signal, and an output node to provide a gate signal, at least a first gain stage including a resistor and a switch circuit as above. A differential gain amplifier may be included to provide an output signal from the gain signal.

Abstract: A switch circuit is provided. The switch circuit may include a first transistor having a source terminal to accept an input signal, a drain terminal to provide an output signal, and a gate; a power supply providing a gate voltage. The switch circuit may also include a circuit to couple a switch signal to the gate, wherein the circuit turns the first transistor ‘off’ for all values of the input signal when the switch signal is ‘low.’ A programmable gain amplifier (PGA) is also provided. The PGA may include an input stage having an input node to couple an input signal, and an output node to provide a gate signal, at least a first gain stage including a resistor and a switch circuit as above. A differential gain amplifier may be included to provide an output signal from the gain signal.

Abstract: A phase interpolator is provided. The phase interpolator comprises a plurality of reference stages, the reference stages receiving a reference signal having a predetermined phase and outputting a component signal, wherein the reference stages comprise a plurality of current source circuits, and the current source circuits comprise a plurality of transistors, and the transistors of the current source circuits are coupled to one another by the drains of the transistors.

Abstract: A method is provided for improving clock recovery signal jitter in digital communication based on a phase adjustment technique in a phase interpolation. A clock signal is expressed as the combination of two sinusoidal signals. The phase interpolating process determines the amplitude of the first sinusoidal signal, and the amplitude of the second sinusoidal signal that is 90° out of phase from the first sinusoidal signal. The clock signal is then formed by combining first sinusoidal signal with the second sinusoidal signal by choosing the first and second amplitude such that the amplitude of the clock signal is substantially a constant. Modulation of the clock signal amplitude is significantly improved by the disclosed technique over the conventional technique when the sum of the first and second amplitudes of the two sinusoidal functions is kept a constant.

Abstract: A phase interpolator is provided. The phase interpolator comprises a plurality of reference stages, the reference stages receiving a reference signal having a predetermined phase and outputting a component signal, wherein the reference stages comprise a plurality of current source circuits, and the current source circuits comprise a plurality of transistors, and the transistors of the current source circuits are coupled to one another by the drains of the transistors.

Abstract: A vector and a method are provided for delivering a nucleic acid to a nervous system cell. The vector includes a first nucleic acid, a second nucleic acid, inverted terminal repeats of adeno-associated virus, and a tetracycline-off regulatable promoter system that includes a first promoter operably linked to the first nucleic acid and a second promoter operably linked to the second nucleic acid. The promoters drive expression in opposite directions and away from the inverted terminal repeats. The method includes providing a recombinant adeno-associated viral (rAAV) vector and administering the vector to a nervous system cell. Expression of a product from the first nucleic acid is regulatable by the promoter system.

Abstract: A vector and a method are provided for delivering a nucleic acid to a nervous system cell. The vector includes a first nucleic acid, a second nucleic acid, inverted terminal repeats of adeno-associated virus, and a tetracycline-off regulatable promoter system that includes a first promoter operably linked to the first nucleic acid and a second promoter operably linked to the second nucleic acid. The promoters drive expression in opposite directions and away from the inverted terminal repeats. The method includes providing a recombinant adeno-associated viral (rAAV) vector and administering the vector to a nervous system cell. Expression of a product from the first nucleic acid is regulatable by the promoter system.

Abstract: A vector and a method are provided for delivering a nucleic acid to a nervous system cell. The vector includes a first nucleic acid, a second nucleic acid, inverted terminal repeats of adeno-associated virus, and a tetracycline-off regulatable promoter system that includes a first promoter operably linked to the first nucleic acid and a second promoter operably linked to the second nucleic acid. The promoters drive expression in opposite directions and away from the inverted terminal repeats. The method includes providing a recombinant adeno-associated viral (rAAV) vector and administering the vector to a nervous system cell. Expression of a product from the first nucleic acid is regulatable by the promoter system.

Abstract: A vector and a method are provided for delivering a nucleic acid to a nervous system cell. The vector includes a first nucleic acid, a second nucleic acid, inverted terminal repeats of adeno-associated virus, and a tetracycline-off regulatable promoter system that includes a first promoter operably linked to the first nucleic acid and a second promoter operably linked to the second nucleic acid. The promoters drive expression in opposite directions and away from the inverted terminal repeats. The method includes providing a recombinant adeno-associated viral (rAAV) vector and administering the vector to a nervous system cell. Expression of a product from the first nucleic acid is regulatable by the promoter system.

Abstract: A hammer has an impact head, a handle and an elastomeric grip cover. The free end of the grip cover includes a tuned vibration absorber. In one design, the tuned vibration absorber is integral with the grip cover and may or may not include a higher density mass portion. In other designs, a mass is located within a pocket formed in the grip cover. The pocket may be open or closed.

Abstract: An acoustic enclosure for reducing noise of a hard disk drive with a forced air cooling system is disclosed. The enclosure consists of box-shaped structure encapsulating the hard disk drive, including a top and/or base cover having an inlet and outlet opening in the enclosure to allow for directed air flow across the drive. The hard disk drive is mounted within the enclosure through vibration isolation mounts. The fan component can either be incorporated within the enclosure or attached externally through vibration isolators, providing a forced air cooling for the hard disk drive. The enclosure can be injection molded of suitable thermoplastics and elastomers. The enclosure can also be formed of sheet metal and laminates. The enclosure is preferably used to reduce the noise emission from the hard disk drive in a computer, television set-top box, digital video recorders and other consumer electronic product applications.