摘要:
The invention relates to a line driver to drive a transmission line with a differentially balanced signal, with selectable signal amplitude, with output impedance matched to a characteristic impedance of the transmission line, and with reduced dissipation. The line driver includes a first driver subcircuit including a first and a second group of resistors. To drive an output node with a first signal sense, the first group of resistors is selectively coupled to a first bias voltage terminal and the second group to a second bias voltage terminal. To drive the first output node with a second signal sense, the first and second groups of resistors are both selectively coupled to the second bias voltage terminal. The line driver includes a second driver subcircuit. The second driver subcircuit includes a third and fourth group of resistors that are correspondingly switched.
摘要:
The invention relates to a line driver to drive a transmission line with a differentially balanced signal, with selectable signal amplitude, with output impedance matched to a characteristic impedance of the transmission line, and with reduced dissipation. The line driver includes a first driver subcircuit including a first and a second group of resistors. To drive an output node with a first signal sense, the first group of resistors is selectively coupled to a first bias voltage terminal and the second group to a second bias voltage terminal. To drive the first output node with a second signal sense, the first and second groups of resistors are both selectively coupled to the second bias voltage terminal. The line driver includes a second driver subcircuit. The second driver subcircuit includes a third and fourth group of resistors that are correspondingly switched.
摘要:
A circuit for operating loudspeakers includes a first, second, third and fourth loudspeaker circuit, having one input each for injecting a signal and one output each for connecting a loudspeaker input. The loudspeaker circuits are designed to amplify the injected signal and to provide the amplified signal at the outputs thereof. The loudspeaker circuits can, for example, be used for a 2.1 sound system. The three channels for a 2.1 sound system can be implemented by an amplifier circuit with four loudspeaker circuits, one loudspeaker circuit each being required for the two stereo channels left and right. A subwoofer channel can be driven differentially by two loudspeaker circuits. The stereo channels are, by contrast, only still connected to one loudspeaker circuit each, and so the stereo channels require at least one further common ground cable.
摘要:
An embodiment of the invention relates to a nonvolatile mass storage device such as a flash memory device formed with erase blocks partitioned into memory management blocks. An erase block is identified containing at least a minimum number of management blocks marked invalid, from which data is copied, merged, and stored in a new management block. The erase block is then erased. Erase blocks containing at least the minimum number of invalid management blocks may be erased until a minimum amount of management blocks is free. Alternatively, all erase blocks containing at least the minimum number of invalid management blocks may be erased. A management table listing the number of invalid management blocks in erase blocks may be included in the mass storage device. Preferably, the new management block for storage of the merged data is located in an erase block different from the identified erase block.
摘要:
An embodiment of the invention relates to a mass storage device including a nonvolatile memory device with a plurality of memory management blocks and an address translation table formed with pointers to locations of the memory management blocks. A volatile memory device is included with an address index table formed with pointers to the pointers to the locations of the memory management blocks. The address index table is stored in the nonvolatile memory upon loss of bias voltage. Changes to the address translation table are accumulated in the volatile memory and written to the address translation table when at least a minimum quantity of the changes has been accumulated. The changes to the logical block address translation table accumulated in the volatile memory are written to a page in the address translation table after prior data in the page has been updated, written to another page, and then erased.
摘要:
A device for processing binary data comprises at least one transmission link having an input for receiving a serial bit stream and an output for forwarding bits in a parallel format, and a serial/parallel converter providing n≧2 successive data bits of the serial bit stream as n-bit data words in the parallel format. The serial/parallel converter comprises a 1-to-n demultiplexer which is constructed and controllable in such a manner that the successive data bits of the serial bit stream appear in succession at intervals equal to a bit period TB cyclically at n data outputs and remain latched at the respective data output until a data bit appears again at the relevant data output and a relatching circuit with latching elements which receive the signals from the data outputs of the demultiplexer at which the first k data bits of each cycle appear and which are enabled in each case at a time which is between the beginning of the latching of the last data bit and the end of the latching of the first data bit of the relevant cycle in the demultiplexer, wherein 1≦k
摘要翻译:一种用于处理二进制数据的装置包括至少一个具有用于接收串行比特流的输入和用于以并行格式转发比特的输出的传输链路,以及串行/并行转换器,其提供串行比特的n≥2个连续数据比特 流作为并行格式的n位数据字。 串行/并行转换器包括1对n解复用器,其被构造和可控制,使得串行比特流的连续数据位以n个数据输出周期性地等于比特周期TB的间隔连续出现并保持 锁存在相应的数据输出,直到数据位再次出现在相关数据输出端,并且具有锁存元件的重合电路,该锁存元件接收来自每个周期的第一个k个数据位的多路复用器的数据输出端的信号, 在每种情况下,在解锁器中最后数据位的锁存开始和相关周期的第一数据位的锁存结束之间的时间,其中1 <= k
摘要:
The invention relates to a DLL circuit for providing an adjustable time delay of a periodic input signal, said circuit having controllable delay elements which are connected in series and form a delay chain, having a phase detector in order to generate a control signal on the basis of the periodic input signal and a periodic signal which has been delayed by the delay chain, the delay of each of the delay elements being adjusted on the basis of the control signal, and having a selection unit which is respectively connected to one of the delay elements in order to apply an output signal from one of the delay elements to an output of the DLL circuit on the basis of a selection variable which has been provided, and a compensation circuit which modifies the selection signal such that an additional delay (which is caused at least by the selection unit) between the periodic input signal and the output signal from the DLL circuit is compensated for.
摘要:
A method and a storage device for storing data in a flash memory drive are disclosed. In order to increase data throughput, the drive includes a cache memory including a tag memory and a plurality of flash devices coupled via a plurality of channels to the cache memory.
摘要:
In an embodiment, an oversampled data converter includes a lowpass filter having a filter stage comprising a dynamic limiter, where the dynamic limiter having a limit set by an signal level at an input to the oversampled data converter. The oversampled data converter also includes a quantizing block comprising an input coupled to an output of the lowpass filter and an output coupled to an input of the lowpass filter.
摘要:
A method and a device for reconstructing data, clocked at a symbol rate, from a signal which has been distorted by transmission of a transmission link, are disclosed. The method or respectively, the device, being predominantly performed or implemented, respectively, by means of digital circuit technology in order to improve the quality of the data recovery. The method includes amplifying the signal amplitude attenuated by the transmission; filtering high-frequency interference frequencies above the symbol rate; discretizing the analog signal by means of an analog/digital converter; performing a cable approximation by means of a digitally implemented cable approximation filter in order to obtain an equalized signal; and recovering the data from the equalized signal by means of a phase-locked loop.