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41.发明授权公开(公告)号：US10560061B2
公开(公告)日：2020-02-11
申请号：US15254782
申请日：2016-09-01
申请人： Analog Devices, Inc.
发明人： Sandro Herrera , Alan K Jeffery
摘要： A low capacitance n-channel analog switch circuit, a p-channel analog switch circuit, and a full CMOS transmission gate (T-gate) circuit are described. Resistive decoupling can be used to isolate the switch or T-gate from AC grounds. A semiconductor region that is separated from a body region of a pass field-effect transistor (FET), such as by an insulator, can be coupled to or driven to a voltage similar to the input voltage or other desired bias voltage (e.g., an operational amplifier output) to help reduce parasitic capacitance of the switch or T-gate. The switch or T-gate can help provide improved frequency bandwidth or frequency response. The switch can be useful in a programmable gain amplifier (PGA) or programmable gain instrumentation amplifier (PGIA) or other circuit in which excessive switch capacitance could degrade circuit performance.
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公开(公告)号：US10536113B2
公开(公告)日：2020-01-14
申请号：US15627249
申请日：2017-06-19
发明人： Sudipto Chakraborty
摘要： A variable-gain power amplifying technique includes generating, with a network of one or more reactive components included in an oscillator, a first oscillating signal, and outputting, via one or more taps included in the network of the reactive components, a second oscillating signal. The second oscillating signal has a magnitude that is proportional to and less than the first oscillating signal. The power amplifying technique further includes selecting one of the first and second oscillating signals to use for generating a power-amplified output signal, and amplifying the selected one of the first and second oscillating signals to generate the power-amplified output signal.
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公开(公告)号：US10523169B2
公开(公告)日：2019-12-31
申请号：US16365947
申请日：2019-03-27
IPC分类号： H04R29/00 , H03G5/00 , H03G3/30 , H03G7/00 , H03G9/00 , H03G1/00 , H04R3/04 , G10L21/038 , G10L25/21
摘要： In some embodiments, a method for processing an audio signal in an audio processing apparatus is disclosed. The method includes receiving an audio signal and a parameter, the parameter indicating a location of an auditory event boundary. An audio portion between consecutive auditory event boundaries constitutes an auditory event. The method further includes applying a modification to the audio signal based in part on an occurrence of the auditory event. The parameter may be generated by monitoring a characteristic of the audio signal and identifying a change in the characteristic.
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公开(公告)号：US20190354165A1
公开(公告)日：2019-11-21
申请号：US16531951
申请日：2019-08-05
申请人： Sonos, Inc.
IPC分类号： G06F1/3296 , H04R27/00 , H03F99/00 , G06F3/16 , H03G1/00 , H04L29/06 , H03F1/52 , G06F1/3246 , G06F1/3209 , H03F3/183
摘要： Techniques for controlling one or more audio amplifiers in or associated with a device coupled on a local area network are disclosed. An example playback device includes a processor, an amplifier, a network interface, and a memory. The memory includes a software module that, when executed by the processor, causes the playback device to: operate in a first power mode in which the amplifier consumes a first amount of power; while operating in the first power mode, determine that a defined time has passed since receiving, via the network interface, a specified type of data packet; and based on determining that the defined time has passed since receiving the specified type of data packet, transition from operating in the first power mode to operate in a second power mode in which the amplifier consumes a second amount of power, wherein the first amount of power is greater than the second amount of power.
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公开(公告)号：US10476502B2
公开(公告)日：2019-11-12
申请号：US15582257
申请日：2017-04-28
发明人： Yongjie Cheng , Lei Zhu , Kyehyung Lee
IPC分类号： H03K19/00 , H03K17/06 , H03K19/04 , H03F1/02 , H03G1/00 , H03K19/094 , H03F3/187 , H03F3/217 , H03F3/45
摘要： In accordance with embodiments of the present disclosure, a system may include a buffer and a switch coupled between the buffer and a voltage supply such that the switch controls a varying voltage at a varying voltage node coupled to the buffer.
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公开(公告)号：US10469045B2
公开(公告)日：2019-11-05
申请号：US15692912
申请日：2017-08-31
发明人： Junhyung Lee
IPC分类号： H03G3/20 , H03G3/30 , H03F3/45 , H03F3/21 , H03F1/22 , H03F1/56 , H03G1/00 , H03G3/00 , H03F3/24 , H03F3/72
摘要： A signal amplifier having an input impedance that varies over different bias currents, the signal amplifier comprising a compensation stage including a switchable variable resistance configured to provide a targeted adjustment to the input impedance. A signal amplifier comprising: a variable-gain stage configured to provide a plurality of gain levels that result in different input impedance values; and a compensation stage having a switchable variable resistance configured to provide a targeted adjustment to a respective input impedance. a compensation stage having an output coupled to an input of the gain stage, the compensation stage including a plurality of band selection switches coupled to the plurality of input nodes and a plurality of switchable variable resistance branches coupled to the band selection switches, individual switchable variable resistance branches configured to provide a targeted adjustment to a respective input impedance.
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公开(公告)号：US20190334493A1
公开(公告)日：2019-10-31
申请号：US16507723
申请日：2019-07-10
摘要： Amplifier systems and methods are provided that include a fixed gain amplification stage coupled to an adjustable attenuation stage further coupled to a variable gain amplification stage. A controller controls an amount of attenuation provided by the adjustable attenuation stage and an amount of gain provided by the variable gain amplification stage to maintain any of various noise, efficiency, and/or linearity requirements of the amplifier system.
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公开(公告)号：US20190324483A1
公开(公告)日：2019-10-24
申请号：US16458290
申请日：2019-07-01
申请人： PixArt Imaging Inc.
发明人： KOK-SIANG TAN , WAI-LIAN TEO
摘要： A bandgap reference circuit including a clamp circuit is provided. The bandgap reference circuit performs the calibration only for one time in a normal mode to store a control code of a reference generator of the clamp circuit. In a suspend mode, the control code is used for controlling the reference generator to cause the clamp circuit to provide a desired source voltage, and a bandgap reference voltage source is shut down to reduce the power consumption.
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公开(公告)号：US10454441B2
公开(公告)日：2019-10-22
申请号：US16200852
申请日：2018-11-27
发明人： Mostafa Ahmed , Alexander Rylyakov
摘要： In conventional optical receivers the dynamic range is obtained by using variable gain amplifiers (VGA) with a fixed trans-impedance amplifier (TIA) gain. To overcome the SNR problems inherent in conventional receivers an improved optical receiver comprises an automatic gain control loop for generating at least one gain control signal for controlling gain of both the VGA and the TIA. Ideally, both the resistance and the gain of the TIA are controlled by a gain control signal.
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公开(公告)号：US20190305732A1
公开(公告)日：2019-10-03
申请号：US15937906
申请日：2018-03-28
申请人： Intel IP Corporation
发明人： Benjamin Jann
摘要： A circuit containing a first cascode circuit and a second cascode circuit is proposed. The first circuit and the second cascode circuit are stacked between two power supply terminals. An output signal terminal of the circuit is coupled to a node connecting the first cascode circuit and the second cascode circuit. A first signal path is provided between the first cascode circuit and a common ground terminal and a second signal path is provided between the second cascode circuit and the common ground terminal.
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