摘要:
A signal processor used to process an analog read signal representing data stored on a magnetic disk allows for a faster read operation without requiring an increase in its circuit area or buffer memory space. The signal processor includes a decision feedback equalizer which selectively provides a feedback signal added to a read signal in reproducing data read from a storage medium. The signal processor also performs error correction. In performing error correction, the load of the error correcting process is detected and the processing speed is altered depending upon the detected load.
摘要:
A signal processor used to process an analog read signal representing data stored on a magnetic disk allows for a faster read operation without requiring an increase in its circuit area or buffer memory space. The signal processor includes a decision feedback equalizer which selectively provides a feedback signal added to a read signal in reproducing data read from a storage medium. The signal processor also performs error correction. In performing error correction, the load of the error correcting process is detected and the processing speed is altered depending upon the detected load.
摘要:
A digital arithmetic operation circuit includes a plurality of arithmetic operation blocks, a control signal generator and a selector. The plurality of arithmetic operation blocks receive a plurality of digital input signals and perform different arithmetic operations on the received digital input signals, in parallel, to output operation result signals. The a control signal generator receives a plurality of digital input signals and generates a control signal based on the digital input signals. The selector selects one of the operation result signals, in response to the control signal, to output the selected operation result signal. After the control signal generator supplies the control signal to the selector, the selector outputs the selected operation result signal as soon as the selected operation result signal is supplied to the selector.
摘要:
An SE0 timer detects that an SE0 state of a universal serial bus continues for 3 ms or more, and asserts an SE03ms detected signal to a suspending/reset discriminating circuit. The suspending/reset discriminating circuit connects a pull-up resistor to a D+ data line, detects that the universal serial bus is in the SE0 state, and asserts a reset detected signal to a reset control circuit. The reset control circuit asserts a threshold level changing signal to a receiver for a high-speed mode. The receiver changes the threshold into 250 mV. When the reset control circuit detects a K state of the universal serial bus after chirp driving K is executed and ended, the reset control circuit negates the threshold level changing signal to the receiver. The receiver changes the threshold back to 125 mV.
摘要:
A backup system which can improve reliability of data without sacrificing availability of a data processing system and a duplicating apparatus employed in the backup system. The backup system includes a duplicating apparatus for taking in data in the transfer of the data and codes from a host apparatus to a storage apparatus and holding the data as duplicated data, the duplicating apparatus including a code fetching unit to fetch the codes and hold the fetched codes as duplicated codes, and a data verifying unit to verify existence or nonexistence of an error in the data by comparing the taken data and the duplicated data.
摘要:
A pipe laying apparatus including an excavator propulsion unit located in a starting pit. The excavator includes an excavator body having a first axis, an excavating tool having a second axis and located at a forward end portion of the excavator body, and injection ports formed in the excavating tool for injecting a viscosity imparting liquid into soil as excavated. The excavator body has a rearward portion thereof disposed adjacent pipes to be laid each having an outer diameter smaller than the outer diameter of the excavating tool and positioned at a rearward end thereof against the propulsion means, and is operative to excavate the earth to form a hole therein while the viscosity imparting liquid is being injected through the injection ports into the soil as excavated to thereby produce a viscosity imparting liquid containing soil which is conveyed rearwardly through an outer periphery of the excavator body while being filled in an annular clearance defined between the hole formed in the earth and the pipes to be laid, so that the pipes can be successively laid as the excavator body and the pipes are propelled forwardly by the propulsion unit.
摘要:
An interface converter for functionally connecting external devices having interfaces complying with different standards. The interface converter includes a USB-ATAPI command converter and a USB-ATA command converter. A switching controller checks the type of the interface of each external device and activates one of the command converters in accordance with the result of the checking.
摘要:
An SE0 timer detects that an SE0 state of a universal serial bus continues for 3 ms or more, and asserts an SE03ms detected signal to a suspending/reset discriminating circuit. The suspending/reset discriminating circuit connects a pull-up resistor to a D+ data line, detects that the universal serial bus is in the SE0 state, and asserts a reset detected signal to a reset control circuit. The reset control circuit asserts a threshold level changing signal to a receiver for a high-speed mode. The receiver changes the threshold into 250 mV. When the reset control circuit detects a K state of the universal serial bus after chirp driving K is executed and ended, the reset control circuit negates the threshold level changing signal to the receiver. The receiver changes the threshold back to 125 mV.
摘要:
A vibration generating apparatus including a support body having a first center axis, a first spherical joint element provided at a forward end of the support body and having the center of a sphere located on the first center axis, a vibrating body having a second center axis passing through the sphere center, a second spherical joint element provided on the vibrating body and concentric complementary with the first spherical joint element to cooperate therewith to allow the vibrating body to be supported on the support member for universal movement, a rotary shaft coaxially rotatably supported within the vibrating body, a pair of eccentric weights mounted on the rotary shaft with a phase deviation of 180 degrees and in a manner symmetrical with respect to the sphere center, and a drive motor connected to the rotary shaft for driving same for rotation whereby the pair of eccentric weights are rotated about the second center axis to cause the vibrating body to move in conical motion vibration such that the second center axis describes a circular cone having a vertex located at the sphere center about the first center axis.