Patents Assigned to Trigence Semiconductor, Inc.
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Publication number: 20140169577Abstract: As one embodiment of the present invention, provided is a drive circuit to which a three-value signal including a value representing zero is input, and that outputs two two-value signals that drive two drive elements such that the difference between values representing the two two-value signals corresponds to a value representing the input three-value signal, the drive circuit being characterized by the combination of the output two two-value signals when the value of the input three-value signal represents zero being determined in accordance with the input history of the three-value signal. The drive circuit may also be provided with a memory that records a flag value that is reversed in accordance with the input history of the input three-value signal, and the combination of the output two two-value signals being determined in accordance with the flag.Type: ApplicationFiled: February 12, 2014Publication date: June 19, 2014Applicant: Trigence Semiconductor, Inc.Inventors: Akira YASUDA, Jun-ichi OKAMURA
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Publication number: 20140028227Abstract: An inverter for generating a plurality of alternating signals to be supplied to a motor, the motor having a plurality of phases and a plurality of coils arranged at each of the plurality of phases is provided. The inverter is a motor driving inverter characterized in including a multi-level pulse-density modulator configured to modulate a signal that fluctuates periodically and controls rotation of the motor; and a plurality of switching elements configured to generate each of the plurality of alternating signals by controlling an ON/OFF of a direct current according to selection by an output signal of the pulse-density modulator.Type: ApplicationFiled: September 30, 2013Publication date: January 30, 2014Applicant: TRIGENCE SEMICONDUCTOR, INC.Inventors: Akira YASUDA, Jun-ichi Okamura
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Publication number: 20130156231Abstract: A digital/analog conversion apparatus to convert a digital signal into an analog signal. The digital/analog conversion apparatus can generate a high-quality analog signal, even when elements configuring the digital/analog conversion apparatus have variance, with high resolution and a small circuit size. The data conversion apparatus is provided with a first data converter to reduce the number of bits of an input signal, a second data converter to convert the format of the first output signal, and a third data converter for conversion into a code which corresponds to the history of the output from the second data converter.Type: ApplicationFiled: February 8, 2013Publication date: June 20, 2013Applicant: TRIGENCE SEMICONDUCTOR, INC.Inventor: TRIGENCE SEMICONDUCTOR, INC.
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Publication number: 20130093607Abstract: The disclosed conversion device converts an analog input signal into a digital signal and outputs thereof, wherein the conversion device comprises a feedback signal generator for performing mismatch shaping on the digital signal that has been converted and output, and then performing digital-analog conversion to generate a feedback signal; a subtractor for subtracting the feedback signal from the analog input signal and outputting thereof; a serial-parallel converter for converting the signal output from the subtractor into a plurality of parallel signals and outputting thereof; a vector filter for performing signal processing on the plurality of parallel signals output by the serial-parallel converter and outputting a plurality of signals; a quantizer for quantizing the plurality of signals output by the vector filter and outputting digital signals; and a parallel-serial converter for converting the digital signals output by the quantizer into serial signals and outputting thereof.Type: ApplicationFiled: July 18, 2012Publication date: April 18, 2013Applicant: TRIGENCE SEMICONDUCTOR, INC.Inventors: Akira YASUDA, Jun-ichi Okamura
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Patent number: 8423165Abstract: A digital/analog conversion apparatus for converting a digital signal into an analog signal. The digital/analog conversion apparatus can generate a high-quality analog signal, even when elements configuring the digital/analog conversion apparatus have variance, with high resolution and a small circuit size. The data conversion apparatus is provided with a first data converter for reducing the number of bits of an input signal, a second data converter for converting the format of the first output signal, and a third data converter for conversion into a code which corresponds to the history of the output from the second data converter.Type: GrantFiled: October 1, 2008Date of Patent: April 16, 2013Assignee: Trigence Semiconductor, Inc.Inventors: Akira Yasuda, Junichi Okamura
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Publication number: 20130058497Abstract: A digital sound system suitable for a digital speaker device to directly convert analog sound by a circuit using a ?? modulator and a mismatch shaping filter circuit to output a plurality of digital signals and a plurality of speakers driven by the plurality of digital signals. A digital speaker driving device includes a ?? modulator, a post filter, s driving circuits, and a power supply circuit to supply power to the ?? modulator, the post filter and the s driving elements, and the s driving circuits are adapted to s digital signal terminals.Type: ApplicationFiled: October 31, 2012Publication date: March 7, 2013Applicant: Trigence Semiconductor, Inc.Inventor: Trigence Semiconductor, Inc.
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Patent number: 8306244Abstract: A digital sound system suitable for a digital speaker device for directly converting analog sound by a circuit using a ?? modulator and a mismatch shaping filter circuit to output a plurality of digital signals and a plurality of speakers driven by the plurality of digital signals. A digital speaker driving device includes a ?? modulator, a post filter, s driving circuits, and a power supply circuit to supply power to the ?? modulator, the post filter and the s driving elements and the s driving circuits are adapted to s digital signal terminals.Type: GrantFiled: March 22, 2010Date of Patent: November 6, 2012Assignee: Trigence Semiconductor, Inc.Inventors: Jun-ichi Okamura, Akira Yasuda
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Publication number: 20120057727Abstract: A selection device includes an acquisition part to acquire digital selection signals, and an output part to output selection signals to respective unit cells, each unit cell capable of being commanded to output the value zero. In the selection device, each selection signal is to command the unit cell to output a value corresponding to that selection signal; the sum of the values to be output as commanded by the respective selection signals, which are output to the respective unit cells, is a value determined in association with the digital selection signal; and if the output corresponding to the digital selection signal is the value zero, then selection signals each commanding to output a non-zero value (N) are output to some of the unit cells.Type: ApplicationFiled: August 30, 2011Publication date: March 8, 2012Applicant: TRIGENCE SEMICONDUCTOR, INC.Inventors: Akira YASUDA, Jun-ichi Okamura
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Publication number: 20110160883Abstract: An acoustic playback system including a digital filter; and a plurality of digital modulators each of which output a digital signal to one of a plurality of speakers configured with speakers driven by digital signals having different play back bandwidths; wherein the digital filter converts a digital audio signal which is input into a plurality of digital audio signals of a plurality of frequency bandwidths corresponding to play back bandwidths of the plurality of speakers, and outputs each of the digital audio signals of the plurality of frequency bandwidths to one of the plurality of digital modulators; each of the plurality of digital modulators outputs the modulated digital signal to the speaker of a play back bandwidth corresponding to a frequency bandwidth of the digital audio signal which is input by performing miss match shaping after noise shaping to a digital audio signal which is input; and each number of bits of a digital signal which is output by each of the digital modulators is different is proType: ApplicationFiled: December 28, 2010Publication date: June 30, 2011Applicant: TRIGENCE SEMICONDUCTOR, INC.Inventors: Akira Yasuda, Jun-ichi Okamura
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Publication number: 20100239101Abstract: A digital sound system suitable for a digital speaker device for directly converting analog sound by a circuit using a ?? modulator and a mismatch shaping filter circuit to output a plurality of digital signals and a plurality of speakers driven by the plurality of digital signals. A digital speaker driving device includes a ?? modulator, a post filter, s driving circuits, and a power supply circuit to supply power to the ?? modulator, the post filter and the s driving elements and the s driving circuits are adapted to s digital signal terminals.Type: ApplicationFiled: March 22, 2010Publication date: September 23, 2010Applicant: TRIGENCE SEMICONDUCTOR, INC.Inventors: Jun-ichi Okamura, Akira Yasuda
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Publication number: 20090110217Abstract: A digital/analog conversion apparatus for converting a digital signal into an analog signal. The digital/analog conversion apparatus can generate a high-quality analog signal, even when elements configuring the digital/analog conversion apparatus have variance, with high resolution and a small circuit size. The data conversion apparatus is provided with a first data converter for reducing the number of bits of an input signal, a second data converter for converting the format of the first output signal, and a third data converter for conversion into a code which corresponds to the history of the output from the second data converter.Type: ApplicationFiled: October 1, 2008Publication date: April 30, 2009Applicant: Trigence Semiconductor, Inc.Inventors: Akira Yasuda, Junichi Okamura