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1. 发明授权

US11641183B2 Audio dynamics processing control system with integration release window 有权
公开(公告)号：US11641183B2
公开(公告)日：2023-05-02
申请号：US16661954
申请日：2019-10-23
申请人： James Kinney Waller, Jr.
发明人： James Kinney Waller, Jr.
IPC分类号： H03G7/06 , H04R29/00 , H04R3/00
摘要： An improved dynamics processing control system incorporates an integration release window to virtually eliminate ripple in the final control signal used to control a Voltage Controlled Amplifier in a signal processor. The input audio signal is level detected using a logarithmic level detector and filtered to provide a very fast time constant. The fast release time constant signal is clamped at a maximum level equal to the user defined threshold and filtered by a second filter providing a very long release time constant. The long release time constant is dynamically varied by the fast time constant to provide an adaptive slow time constant. The fast time constant signal modifies the adaptive slow time constant when the difference between the fast time constant and the slow time constant exceeds a predefined integration release window. The integration release window is based on a minimum number of decibels which is larger than the maximum possible ripple in the fast time constant signal. The integration release window tracks the adaptive slow time constant signal to maintain the integration release window over the entire release range of the adaptive slow time constant decay. Once the difference between the fast time constant signal and adaptive slow time constant signal is less than the integration release window, the slow release signal reverts to the un-altered slow time constant release response.

2. 发明授权

US11321543B2 Logarithmic amplifier 有权
公开(公告)号：US11321543B2
公开(公告)日：2022-05-03
申请号：US17179847
申请日：2021-02-19
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Vadim Valerievich Ivanov
IPC分类号： G06G7/24 , H03G7/06 , H03G7/00
摘要： A logarithmic amplifier includes a logarithmic current preamplifier circuit and logarithmic amplifier circuit. The logarithmic current preamplifier circuit includes an inverting input terminal, an output terminal, and a first diode. The first diode is coupled between the inverting input terminal of the logarithmic current preamplifier circuit and the output terminal of the logarithmic current preamplifier circuit. The logarithmic amplifier circuit includes an inverting input terminal, an output terminal, and a second diode. The inverting input terminal of the logarithmic amplifier circuit is coupled to the output terminal of the logarithmic current preamplifier circuit. The second diode is coupled between the inverting input terminal of the logarithmic amplifier circuit and the output terminal of the logarithmic amplifier circuit.

3. 发明授权

US11165401B2 Dynamic and self-adjusting microphone gain for voice-enabled devices 有权
公开(公告)号：US11165401B2
公开(公告)日：2021-11-02
申请号：US16901724
申请日：2020-06-15
申请人： Hourglass Software LLC
发明人： Faisal Qureshi
IPC分类号： H03G7/06 , G10L21/034 , H04R3/00
摘要： Various acoustic manipulation and microphone gain adjustment techniques are enabled. For instance, a method comprises receiving, by a voice-enabled device comprising a processor and from a microphone, an input comprising environmental audio, determining, by the voice-enabled device, a level of the environmental audio, determining, by the voice-enabled device, a gain-adjust value based on the environmental audio, and adjusting, by the voice-enabled device, a gain of the microphone by the gain-adjust value.

4. 发明申请

US20210218380A1 METHOD FOR INDUCING BRAINWAVES BY SOUND AND SOUND ADJUSTING DEVICE 有权
公开(公告)号：US20210218380A1
公开(公告)日：2021-07-15
申请号：US17102737
申请日：2020-11-24
申请人： PixArt Imaging Inc.
发明人： Kuan-Li CHAO , Kuo-Wei KAO , I-Ting LEE , Wei-Lin CHANG , Wei-Ren LAN , Kuo-Ping YANG
IPC分类号： H03G7/06 , H04R5/02 , H04R5/04 , H04S1/00
摘要： A method for inducing brain waves by sound has the following steps: receiving a first channel input signal and a second channel input signal; adjusting a volume gain of the first channel input signal to form a first channel output signal, wherein a format of the volume gain of the first channel output signal is a first wave format; adjusting a volume gain of the second channel input signal to form a second channel output signal, wherein a format of the volume gain of the second channel output signal is a second wave format, wherein there is a phase difference between the first wave format and the second wave format, wherein the formats of the first wave format and the second wave format are the same; outputting the first channel output signal to a first speaker; and outputting the second channel output signal to a second speaker.

5. 发明授权

US10956687B1 Logarithmic amplifier 有权
公开(公告)号：US10956687B1
公开(公告)日：2021-03-23
申请号：US16711694
申请日：2019-12-12
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Vadim Valerievich Ivanov
IPC分类号： G06G7/24 , H03G7/06 , H03G7/00
摘要： A logarithmic amplifier includes a logarithmic current preamplifier circuit and logarithmic amplifier circuit. The logarithmic current preamplifier circuit includes an inverting input terminal, an output terminal, and a first diode. The first diode is coupled between the inverting input terminal of the logarithmic current preamplifier circuit and the output terminal of the logarithmic current preamplifier circuit. The logarithmic amplifier circuit includes an inverting input terminal, an output terminal, and a second diode. The inverting input terminal of the logarithmic amplifier circuit is coupled to the output terminal of the logarithmic current preamplifier circuit. The second diode is coupled between the inverting input terminal of the logarithmic amplifier circuit and the output terminal of the logarithmic amplifier circuit.

6. 发明授权

US10277211B2 Integrated switch and self-activating adjustable power limiter 有权
公开(公告)号：US10277211B2
公开(公告)日：2019-04-30
申请号：US15365597
申请日：2016-11-30
申请人： pSemi Corporation
发明人： Jianhua Lu , Peter Bacon , Naveen Yanduru , Edward Nicholas Comfoltey , Michael Conry , Chieh-Kai Yang
IPC分类号： H03K17/16 , H04B1/44 , H03K5/08 , H03K17/687 , H03G7/00 , H03G7/06 , H03G11/00 , H03K17/30 , H01L27/02
摘要： A fast response time, self-activating, adjustable threshold limiter including a limiting element LE, a first coupling element CE1 electrically connected from a signal node of LE to a control input of LE, and a second coupling element CE2 electrically connected from the control input of LE to a nominal node of LE. An initial bias (control) voltage is also supplied to the control input of LE to dynamically control the limiting threshold for the limiter. Embodiments include usage of self-activating adjustable power limiters in combination with series switch components in a switch circuit in lieu of conventional shunt switches.

7. 发明授权

US09722563B2 System and method for high input capacitive signal amplifier 有权
公开(公告)号：US09722563B2
公开(公告)日：2017-08-01
申请号：US15230946
申请日：2016-08-08
申请人： Infineon Technologies AG
发明人： Michael Kropfitsch , Jose Luis Ceballos
IPC分类号： H03G7/08 , H03G7/06 , H03F1/32 , H03F3/187 , H03F3/45 , H03G7/00 , H03G3/00 , H04R3/00 , H04R23/00 , H03G3/30 , H03K5/1532 , H03K5/1536 , H04R19/04
CPC分类号： H03G7/08 , H03F1/3211 , H03F3/187 , H03F3/45475 , H03F2200/555 , H03F2203/45166 , H03F2203/45526 , H03G3/002 , H03G3/3005 , H03G3/3089 , H03G7/002 , H03G7/06 , H03K5/1532 , H03K5/1536 , H04R3/00 , H04R19/04 , H04R23/00 , H04R2201/003
摘要： In accordance with an embodiment, a method includes determining an amplitude of an input signal provided by a capacitive signal source, compressing the input signal in an analog domain to form a compressed analog signal based on the determined amplitude, converting the compressed analog signal to a compressed digital signal, and decompressing the digital signal in a digital domain to form a decompressed digital signal. In an embodiment, compressing the analog signal includes adjusting a first gain of an amplifier coupled to the capacitive signal source, and decompressing the digital signal comprises adjusting a second gain of a digital processing block.

8. 发明授权

US6163198A Log-linear variable gain amplifiers and amplifier control apparatus and methods 有权
标题翻译：对数线性可变增益放大器和放大器控制装置及方法
公开(公告)号：US6163198A
公开(公告)日：2000-12-19
申请号：US360602
申请日：1999-07-26
申请人： Robert S. Cargill
发明人： Robert S. Cargill
IPC分类号： G06G7/24 , H03G1/00 , H03G7/06 , G06F7/556
CPC分类号： H03F3/45085 , G06G7/24 , H03G1/0023 , H03G7/06
摘要： Log-linear variable gain amplifiers and amplifier control apparatus and methods providing temperature compensated log-linear gain characteristics with a wide range of control for a current steered variable gain amplifier. The invention provides the sum of scaled linear and exponential terms, proportional to absolute temperature and responsive to an input control voltage. The sum of these terms is applied to a current steered variable gain amplifier to provide the desired log-linear variable gain control. Various embodiments are disclosed.
摘要翻译：对数线性可变增益放大器和放大器控制装置和方法，为电流控制可变增益放大器提供宽范围控制的温度补偿对数线性增益特性。本发明提供了与绝对温度成比例并响应于输入控制电压的定标线性和指数项的总和。这些术语的总和被应用于电流导向可变增益放大器以提供期望的对数线性可变增益控制。公开了各种实施例。

9. 发明授权

US5561392A Logarithmic amplifier employing cascaded full-wave rectifiers including emitter-coupled pairs with unbalanced emitter degeneration as logarithmic elements 失效
标题翻译：采用级联全波整流器的对数放大器，包括具有不平衡发射极退化的发射极耦合对作为对数元件
公开(公告)号：US5561392A
公开(公告)日：1996-10-01
申请号：US102493
申请日：1993-08-05
申请人： Katsuji Kimura
发明人： Katsuji Kimura
IPC分类号： G06G7/24 , H03G7/00 , H03G7/06 , H03G11/08 , G06F7/556 , G06G7/12
CPC分类号： H03G7/001 , H03G7/06
摘要： A logarithmic amplification circuit is provided which is composed of a differential amplifier, a plurality of full-wave rectifiers including two half-wave rectifiers connected so as to have their input signals inverse in phase to each other and respectively receiving an output signal of the differential amplifier, and an adder for adding the output signals of the full-wave rectifier. Each of the half-wave rectifiers includes a differential transistor pair only one of which has an emitter resistor. Two sets of such differential transistor pair are arranged so that the collectors of transistors with emitter resistors are connected, the collectors of transistors without emitter resistors are connected, an output signal of the differential amplifier is applied to the base of one of the transistors having an emitter resistor and one of the transistors not having an emitter resistor, another output signal of the differential amplifier is applied to the base of the other of the transistors having an emitter resistor and the other of the transistors not having an emitter resistor, and the transistors of each pair are connected, respectively, to constant current sources.
摘要翻译：提供了一种对数放大电路，它由差分放大器组成，多个全波整流器包括两个半波整流器，它们连接成使它们的输入信号彼此相位相反，分别接收差分输出信号放大器和用于相加全波整流器的输出信号的加法器。每个半波整流器包括一个差分晶体管对，其中仅一个具有发射极电阻。布置两组这样的差分晶体管对，使得具有发射极电阻的晶体管的集电极连接，没有发射极电阻的晶体管的集电极被连接，差分放大器的输出信号被施加到具有发射极电阻器和不具有发射极电阻器的晶体管之一，差分放大器的另一个输出信号被施加到具有发射极电阻器的另一个晶体管的基极，而另一个晶体管没有发射极电阻器，晶体管分别连接到恒定电流源。

10. 发明授权

US5315660A Wideband expander for stereo and SAP signals 失效
标题翻译：用于立体声和SAP信号的宽带扩展器
公开(公告)号：US5315660A
公开(公告)日：1994-05-24
申请号：US96874
申请日：1993-07-26
申请人： Mark R. Anderson , Robert P. Parker
发明人： Mark R. Anderson , Robert P. Parker
IPC分类号： H03G7/00 , H03G7/06 , H04H5/00
CPC分类号： H03G7/002 , H03G7/06
摘要： A decoding arrangement for decoding audio signals previously encoded in accordance with the dbx format, includes a wideband expander instead of a full dbx expander. The wideband expander employs a relatively simple, and therefore inexpensive, peak detector in place of the true RMS detector of a full dbx expander, and does not include apparatus for spectral expansion of the audio signal. Although the decoding is noncomplementary with respect to the encoding, the stereo audio reproduction as perceived by a listener, is surprisingly good.
摘要翻译：用于对先前根据dbx格式编码的音频信号进行解码的解码装置包括宽带扩展器而不是全dbx扩展器。宽带扩展器采用相对简单且廉价的峰值检测器来代替全dbx扩展器的真实RMS检测器，并且不包括用于音频信号的频谱扩展的装置。虽然解码在编码方面是非补充的，但听众所感觉到的立体声音频再现是令人惊奇的。

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