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公开(公告)号：DE2524072A1
公开(公告)日：1975-12-18
申请号：DE2524072
申请日：1975-05-30
Applicant: SONY CORP
Inventor： HAMADA OSAMU
Abstract: A pulse width modulated signal amplifier system includes a signal input circuit, an amplifier for receiving an input signal from the signal input circuit, a pulse width modulator for receiving an output signal from the amplifier and producing a pulse width modulated signal, and a phase splitter for receiving the pulse width modulated signal and producing a pair of corresponding pulse width modulated signals having different polarities to each other. The system further includes a first demodulator for receiving one of the pair of pulse width modulated signals and demodulating a first output signal having one polarity and an amplitude in response to the input signal, a second demodulator for receiving the other of the pair of pulse width modulated signals and producing a second output signal having the other polarity and an amplitude in response to the input signal, a load supplied with the first and second output signals, an amplitude comparator for comparing the first and second output signals and producing a control signal in response to the comparison result, and a feedback circuit for receiving the control signal and applying it to the amplifier so as to balance the first and second output signal amplitudes.
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公开(公告)号：DE3303488C2
公开(公告)日：1994-09-29
申请号：DE3303488
申请日：1983-02-02
Applicant: SONY CORP
Inventor： HAMADA OSAMU
IPC: G06F7/00 , G06F9/00 , G06F9/06 , G06F9/22 , G06F9/24 , G06F9/38 , G06F17/14 , G06F17/15 , H03H17/02
Abstract: Described is a digital signal processor including at least two memories, that is, a microprogram memory for storing a series of microinstructions for instructing a digital signal processing procedure, and a coefficient memory for storing coefficient data required for performing a series of arithmetic operations on the digital signal data. These data being transferred and written into said microprogram memory and said coefficient memory from a host computer system. The coefficient memory has at least two pages corresponding to the total memory area which may be addressed during digital signal processing to be effected by said microinstructions. Page selection of the coefficient memory may be performed from said host computer system.
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公开(公告)号：CA1193021A
公开(公告)日：1985-09-03
申请号：CA420492
申请日：1983-01-28
Applicant: SONY CORP
Inventor： HAMADA OSAMU
IPC: G06F7/00 , G06F9/00 , G06F9/06 , G06F9/22 , G06F9/24 , G06F9/38 , G06F17/14 , G06F17/15 , H03H17/02
Abstract: DIGITAL SIGNAL PROCESSING SYSTEM Described is a digital signal processor including at least two memories, that is, a microprogram memory for storing a series of microinstructions for instructing a digital signal processing procedure, and a coefficient memory for storing coefficient data required for performing a series of arithmetic operations on the digital signal data. These data being transferred and written into said microprogram memory and said coefficient memory from a host computer system. The coefficient memory has at least two pages corresponding to the total memory area which may be addressed during digital signal processing to be effected by said microinstructions. Page selection of the coefficient memory may be performed from said host computer system.
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公开(公告)号：CA1077143A
公开(公告)日：1980-05-06
申请号：CA249940
申请日：1976-04-09
Applicant: SONY CORP
Inventor： HAMADA OSAMU
Abstract: AMPLIFIER WITH MODULATED POWER SUPPLY VOLTAGE The power supply voltage of an amplifier is modulated by a signal having a waveform that corresponds, at least in selective parts, to the waveform of the signal being amplified by the amplifier.
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公开(公告)号：CA1074236A
公开(公告)日：1980-03-25
申请号：CA271064
申请日：1977-02-04
Applicant: SONY CORP
Inventor： DOI TOSHITADA , IGA AKIRA , HAMADA OSAMU , HUKUDA JYOJI , HAMADA YUICHIRO
Abstract: A speaker system having a fluid source, plural flow pipes connected to the fluid source, each of the plural flow pipes having an opening, the area of the opening corresponding to each order of bite of a PCM (Pulse Code Modulated) input signal, and a device for controlling a flow-condition of the fluid of each of said flow pipes by the PCM input signal, a summation of the outflow from each of the pipes composing an analog acoustic output signal in response to the PCM input signal.
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Patent Agency Ranking
公开(公告)号：CA1016281A
公开(公告)日：1977-08-23
申请号：CA264780
申请日：1976-11-03
Applicant: SONY CORP
Inventor： HAMADA OSAMU
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公开(公告)号：CA1015476A
公开(公告)日：1977-08-09
申请号：CA264781
申请日：1976-11-03
Applicant: SONY CORP
Inventor： HAMADA OSAMU
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公开(公告)号：DE2548907A1
公开(公告)日：1976-05-13
申请号：DE2548907
申请日：1975-10-31
Applicant: SONY CORP
Inventor： HAMADA OSAMU
Abstract: A pulse width modulation circuit which comprises a mixer for combining an input audio signal with a feedback signal and for developing a difference signal to feed to an integration circuit. The integration circuit is coupled to a pulse width modulator which has a sawtooth carrier input for modulating the input audio signal. The resulting pulse modulated signal is then fed to a pulse amplifier and a low-pass filter and finally to a load. The output of the low-pass filter is coupled back to the mixer.
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公开(公告)号：DE2520282A1
公开(公告)日：1975-11-20
申请号：DE2520282
申请日：1975-05-07
Applicant: SONY CORP
Inventor： NAKAMURA HIDEO , OHSAWA MITSUO , HAMADA OSAMU
IPC: H01L21/331 , H01L21/8222 , H01L27/06 , H01L27/07 , H01L29/00 , H01L29/73 , H03B19/14 , H01L29/72
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