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公开(公告)号：US20190187739A1
公开(公告)日：2019-06-20
申请号：US16220762
申请日：2018-12-14
申请人： ABLIC Inc.
发明人： Masakazu SUGIURA , Atsushi IGARASHI , Nao OTSUKA
摘要： A current generation circuit includes: a current source circuit including a first transistor and a first resistor, and configured to output a first current based on a source voltage or a drain voltage of the first transistor and a resistance of the first resistor; a current control circuit including a voltage input terminal, a second transistor and a third transistor, and configured to output a second current based on a source voltage of the second transistor and a resistance of the third transistor; and an impedance circuit including a second resistor formed of a same resistive body as the first resistor and a fourth transistor diode-connected to the second resistor, and configured to generate a control voltage at the voltage input terminal by the first current and the second current, wherein the current generation circuit is configured to output a current based on the second current.
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公开(公告)号：US20180278221A1
公开(公告)日：2018-09-27
申请号：US15927508
申请日：2018-03-21
申请人： ABLIC Inc.
IPC分类号： H03F3/45
CPC分类号： H03F3/45183 , H03F1/0277 , H03F3/45672 , H03F3/45739 , H03F2200/513 , H03F2203/45406
摘要： To perform a rail-to-rail input operation, provided is a differential amplifier circuit including a first differential input pair and a second differential input pair which has a threshold value different from that of the first differential input pair. Both the differential input pairs do not operate at the same time. A transistor is connected between the first differential input pair and a current source to achieve a configuration in which the first differential input pair and the second differential input pair do not operate at the same time.
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公开(公告)号：US20180348807A1
公开(公告)日：2018-12-06
申请号：US15994075
申请日：2018-05-31
申请人： ABLIC Inc.
发明人： Masakazu SUGIURA , Fumihiko MAETANI
IPC分类号： G05F3/26 , H01L27/088
摘要： There is provided a reference voltage circuit which includes a depletion type transistor and an enhancement type transistor. At least one of the depletion type transistor and the enhancement type transistor is formed from a plurality of transistors and the reference voltage circuit is arranged in the form of a common centroid (common center of mass) to avoid the influence of a characteristic fluctuation due to stress from the resin encapsulation of a semiconductor device or the like.
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公开(公告)号：US20180287576A1
公开(公告)日：2018-10-04
申请号：US15938338
申请日：2018-03-28
申请人： ABLIC Inc.
发明人： Masakazu SUGIURA
IPC分类号： H03F3/45
摘要： Provided is a transconductance amplifier including a common-mode feedback circuit that does not affect an operation of the transconductance amplifier. The transconductance amplifier has a transconductance amplifier circuit configured to generate an output current based on an input voltage and a common-mode feedback circuit configured to determine a DC operating point of an output of the transconductance amplifier circuit. The common-mode feedback circuit has a plurality of level shift circuits configured to shift levels of input voltages to output the voltages, and are connected to control terminals of a plurality of transistors.
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公开(公告)号：US20180287567A1
公开(公告)日：2018-10-04
申请号：US15939987
申请日：2018-03-29
申请人： ABLIC Inc.
摘要： Provided is a differential amplification device reduced in DC offset voltage. The amplification device amplifies an input signal, and includes a chopper switch circuit which switches the polarity of the input signal between a normal phase and a reverse phase and outputs the input signal, a V-I conversion circuit which is connected to the chopper switch circuit, a capacitance circuit which is connected to the V-I conversion circuit to store electric charges supplied from the V-I conversion circuit, and an amplification circuit which is connected to the V-I conversion circuit to switch the polarity of an input signal between the normal phase and the reverse phase and amplify the input signal.
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公开(公告)号：US20190115821A1
公开(公告)日：2019-04-18
申请号：US16156501
申请日：2018-10-10
申请人： ABLIC Inc.
发明人： Tsutomu TOMIOKA , Masakazu SUGIURA
摘要： A source-grounded amplifier circuit supplied with a signal of an error amplifier circuit, and an output transistor supplied with a control voltage of the source-grounded amplifier circuit are provided. The source-grounded amplifier circuit has, in a signal path, a current limiting circuit including a cascode circuit controlled by a voltage having a positive temperature coefficient. A voltage regulator capable of reducing a dropout voltage of an output voltage without exceeding a gate breakdown voltage of the output transistor is provided.
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