Abstract:
PROBLEM TO BE SOLVED: To provide a sound simulator or a music simulator including a reverberation simulator having a substantially reduced volatile storage, random access memory, or buffer size in comparison to conventional reverberation simulators. SOLUTION: Size reduction in the sound simulator or the music simulator, is performed by decimating the sound signal prior to applying a sound signal to a reverberator and then interpolating the sound signal generated by the reverberator to restore the sample frequency. The substantial reduction in buffer size enables the usage of the reverberator in low-cost, reduced size and single-chip environments. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a circuit and a system for ramping a voltage across a load (506). SOLUTION: This circuit and the system include a charging circuit (500) for charging a capacitor (501) to generate a ramp-up waveform. A circuit (511) selectively decouples a first driver (510) from the load (506) during a ramp up mode and couples the first driver (510) to the load (506) during a normal operation mode. A ramp-up driver (507a) is selectively coupled to the load (506) during the ramp-up mode for ramping up the voltage across the load (506) in response to the ramp-up waveform generated by the charging circuit (500). A discharging circuit (503d, 514a, b) discharges the capacitor (501) to generate a power-down waveform. The circuit (511) selectively decouples the first driver (501) from the output load (506) during the ramp-down of the voltage across the output load (506). COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a signal processing method and a device capable of performing digital signal processing with high speed and little electric power dissipation. SOLUTION: This method for performing processing digital signal has a step (a) that respectively represents a plurality of signals as RNS number having a plurality of RNS digits physically shown in one hot RNS format and a step (b) that receives input in one hot RNS format and processes the signals using processing circuit part for providing output in one hot RNS format. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an amplifier circuit which maximizes the performance of the circuit. SOLUTION: A sense amplifier circuit includes a differential input circuit which receives first and second data inputs, and generates, in response to a first control signal being active LOW, a differential voltage across first and second nodes, which is indicative of a voltage difference between the first and second inputs; a pull-up circuit which connects, in response to a second control signal being active LOW, a high voltage reference to the first and second nodes; a latching circuit which generates and latches, in response to voltages provided on the first and second nodes by the differential input circuit and the pull-up circuit, first and second latched data outputs; and an equalization circuit which equalizes, in response to a third control signal being active LOW, voltages on data lines respectively connected to the first and second data outputs. The first and second control signals are set such that the second control signal is activated LOW after a finite period following the initial activation of the first control signal. The third control signal is activated LOW when the first and second control signals are inactive HIGH. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a memory element allowing substitution of a normally operating row or column of another memory element for a defective row or column of one given memory element; and to provide a system architecture related to it. SOLUTION: This memory system 200 includes a first memory unit 201 having an array of memory cells and a second memory unit 201 having an array of memory cells including a number of redundant cells. A crossbar switch 202 is provided for switching an address to a defective cell in the array of the first memory unit 201 to the second memory unit 201 to access a selected one of the redundant cells. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a device capable of processing D/A conversion to a multi-channel having input signal with two or more different sampling speeds. SOLUTION: The device and method for conversing a digital input signal to an analog signal at a different rate sampled comprises digital analog converters (DACA-DACD) to each digital input signal. Each digital-analog converter receives the digital input signal and a clock signal corresponding to the sampling rate of the received input signal. The device can receive a set of sample rate signals denoting the sampling rate to each digital input signal. A control router uses the corresponding clock signal and the sample rate signal for distributing each digital input signal to the corresponding digital-analog converters. A clock error signal routes the digital input signal to the DAC in the same way as the operation of the DAC. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an adaptive digital hysteresis technique which is not a conventional single fraction processing technique and generates a main value with 2 modes used so as to reduce a quantization error. SOLUTION: There is a trip point to select a mode to determine which technique of two different techniques is used, a floor or a ceiling. A floor trip point and a ceiling trip point are generated based on an input signal value. The mode is changed when it is beyond a trip point of the other side mode and is not beyond a followed trip point of an existing mode. An output value of the technique has a lower error than the conventional fraction processing by the hysteresis technique. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an improved seek detector for an optical disk storage device, capable of generating a quadrature signal from a discrete-time TES signal and a discrete-time RF baseband signal. SOLUTION: In the optical disk storage device wherein user data is demodulated from a light beam reflecting off data pits in tracks of an optical disk storage medium, a quadrature seek signal is generated indicative of the light beam crossing tracks of the optical disk during a seek operation. The quadrature seek signal is generated from a discrete-time tracking error signal (TES) and a discrete-time RF baseband signal. The discrete-time TES is generated according to the mode of operation, compact disk (CD) or digital video disk (DVD). COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a CD-R controller having a sufficient throughput performance and capable of generating a control signal at sufficient speed. SOLUTION: The CD-R controller includes a buffer manager for receiving a command like a cue sheet, and sends the command to a micro-controller. The micro-controller generates instructions corresponding to each command by using information stored in a ROM. The buffer manager stores the instructions in a buffer and then sends the instructions to a CD-R formatter. The buffer manager then sends signal data corresponding to the instructions to a recording circuit. The CD-R formatter generates control signals to the recording circuit from the instructions. The control signals cause recording circuit to generate recording signals to a CD-R drive. The CD-R drive records the signal indicative of the signal data in response to the recording signals. COPYRIGHT: (C)2007,JPO&INPIT