摘要:
A polypropylene composition comprises: (a) a first stabilising component consisting of 100 ppm or less based on the weight of the polypropylene of a phenolic antioxidant or a mixture of phenolic antioxidants; (b) a second stabilising component consisting of 500 to 1000 ppm based on the weight of the polypropylene of a phosphite antioxidant or a mixture of phosphite antioxidants; and optionally (c) a third stabilising component consisting of 100 ppm to 5000 ppm based on the weight of the polypropylene of a hindered amine light stabiliser or a mixture of such stabilisers. The polypropylene composition advantageously is in the form of fibres. A preferred phenolic antioxidant is 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6 dimethylbenzyl)-1,3,5-triazine-2,4,6-(1H, 3H, 5H)-trione (Lowinox 1790). A preferred phosphite antioxidant is tris(2,4-di-t-butylphenyl) phosphite (Alkanox 240). A preferred optional hindered amine light stabiliser is dimethyl succinate polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidine (Lowilite 62).
摘要:
A method and apparatus for managing the variable timing of internal clock signals derived from an external clock signal in order to compensate for uncertainty and variations in the amount of read clock back timing relative to data flow to achieve a specified read latency. A reset signal is generated at DRAM initialization and starts an first counter, which counts external clock cycles, and is also passed through the slave delay line of the delay lock loop to start a second counter. The counters run continuously once started and the difference in count values represent the internal delay as an external clock signal passes through the delay lock loop to produce an internal read clock signal. An internal read latency value is used to offset either counter to account for the internal read latency of the DRAM circuit. Once the non-offset counter is equivalent to the offset counter, read data is placed on an output line with a specified read latency and synchronized with the external read clock.
摘要:
Multiphase clock generators and methods are provided. A multiphase clock generator has a first clock divider for generating a first-phase clock signal from a first input clock signal. A first logic gate is connected to an output port of the first clock divider. A second clock divider is connected to an output port of the first logic gate. The second clock divider is for generating a second-phase clock signal from the first input clock signal. A second logic gate is connected to an output port of the second clock divider. A third clock divider is connected to an output port of the second logic gate. The third clock divider is for generating a third-phase clock signal from a second input clock signal.
摘要:
The present invention is directed to a lock for a cabinet of the type wherein a door of the cabinet is movable through a frame of the cabinet. An exemplary lock of the present invention includes a first and second restraining member connected by a rod and rotatable around an axis of rotation between a first position wherein a cabinet member is trapped between the restraining members and the door can not move through the frame and a second position wherein the door is freely movable through the frame. The lock optionally includes a mounting member having a rod-retaining section and optionally one or more rotation locks and/or one or more rotation restraints. The restraining members are optionally sized and shaped to facilitate rotation between the first and second position while accommodating different sizes and specifications of cabinet types. The lock optionally includes one or more strengthening members and end extensions angled on one or both ends of the rod. In additional embodiments of the present invention, the lock includes at least one friction pad for contacting a cabinet member and an adjustable connection between the rod and at least one restraining member.
摘要:
In a first aspect, a valve/sensor assembly is provided that includes a door assembly. The door assembly has (1) a first position adapted to seal an opening of a chamber; (2) a second position adapted to allow at least a blade of a substrate handler to extend through the opening of the chamber; and (3) a mounting mechanism adapted to couple the door assembly to the chamber. The valve/sensor assembly also includes a sensor system having a transmitter and a receiver adapted to detect a presence of a substrate and to communicate through at least a portion of the door assembly. Systems, methods and computer program products are provided in accordance with this and other aspects.
摘要:
A system and memory including a circuit for setting write latency and a write/valid indicator. Time margin regions are established just after the first or leading edge and just before the second or following edge of the preamble of the clock signal such that a latency setting will be found unacceptable if it causes a write enable signal to transition in either of these regions. A write/valid indicator circuit creates the start and end time margin regions by delaying either the clock signal or the write enable signal and comparing their timing with the timing of the undelayed write enable signal or clock signal respectively.
摘要:
A memory device is operable in either a high mode or a low speed mode. In either mode, 32 bits of data from each of two memory arrays are prefetched into respective sets of 32 flip-flops. In the high-speed mode, the prefetched data bits are transferred in parallel to 4 parallel-to-serial converters, which transform the parallel data bits to a burst of 8 serial data bits and apply the burst to a respective one of 4 data bus terminals. In the low speed mode, two sets of prefetched data bits are transferred in parallel to 8 parallel-to-serial converters, which transform the parallel data bits to a burst of 8 serial data bits and apply the burst to a respective one of 8 data bus terminals.
摘要:
A child seat detection system determines the presence of an infant seat and can distinguish between a forward-facing infant seat and a rearward-facing infant seat. The system determines the weight on a vehicle seat and compares the weight on the vehicle seat to a rear-facing infant seat maximum. If the weight on the vehicle seat exceeds the rear-facing infant seat maximum, the system determines whether a forward-facing infant seat is on the seat. If the weight on the vehicle seat does not exceed the rear-facing infant seat maximum, then the system determines whether a rear-facing infant seat is on the seat.
摘要:
A method and apparatus for calibrating a data path of a digital circuit uses an even bit pseudo-random calibration pattern. A portion of the pattern is captured in a capture period and used to predict a next arriving portion of the calibration pattern. The next arriving portion of the calibration pattern is captured and then compared to the predicted pattern in a compare period, and the result of the comparison is used to relatively time data arriving in the data path to a clocking signal which clocks in the data. The time duration of the compare period may be varied to ensure that all possible bits of the calibration pattern are used in the calibration procedure.
摘要:
A self terminating electrical socket is described which adjusts communication line termination circuit characteristics in response to a mate engaging the socket. Electrical and mechanical detection techniques are described for switching the termination circuitry from a first state to a second state. The electrical socket is particularly well suited for use in a described memory bus. Multiple termination circuits are described which have different electrical characteristics depending upon the population of the electrical socket.