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公开(公告)号：US20220021375A1
公开(公告)日：2022-01-20
申请号：US17350216
申请日：2021-06-17
发明人： Giovanni Gonano , Marco Raimondi
摘要： An embodiment apparatus comprises a switching-type output power stage, a modulator circuit configured for carrying out a pulse-width modulation and converting an electrical input signal into an input signal pulsed between two electrical levels, having a mean value proportional to the amplitude of the input signal, and a circuit arrangement for controlling saturation of an output signal supplied by the switching-type output power stage. The circuit arrangement comprises a pulse-remodulator circuit, between the output of the modulator circuit and the input of the switching-type output power stage, that is configured for supplying, as a driving signal to the switching-type output power stage, a respective modulated signal pulsed between two electrical levels, measuring a pulse width as pulse time interval elapsing between two consecutive pulsed-signal edges of the pulsed input signal, and, if the measurement indicates that the latter is below a given minimum value, remodulating the pulsed input signal.
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公开(公告)号：US10027315B2
公开(公告)日：2018-07-17
申请号：US15431374
申请日：2017-02-13
发明人： Marco Raimondi , Edoardo Botti
摘要： A method is for reducing pulse skipping from a characteristic affecting a modulating signal input to an integrator of a pulse width modulation (PWM) modulator, together with a square wave carrier signal for generating a triangular waveform of the PWM modulator. The method may include creating a broad synchronous peak at vertexes of the triangular waveform output by the integrator.
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公开(公告)号：US20210391856A1
公开(公告)日：2021-12-16
申请号：US17322100
申请日：2021-05-17
发明人： Marco Raimondi , Giovanni Gonano
摘要： An embodiment pulse-width modulation (PWM) modulator circuit comprises a first half-bridge stage having a first output node and a second half-bridge stage having a second output node. The first output node and the second output node are configured to have an electrical load coupled therebetween to apply thereto a PWM-modulated output signal. The circuit comprises a differential stage having input nodes configured to receive an input signal applied between the input nodes and produce a differential control signal for the first half-bridge stage and the second half-bridge stage. A current comparator is arranged intermediate the differential stage and the first and second half-bridge stages. The current comparator is configured to produce a PWM-modulated drive signal to drive the half-bridge stages as a function of the input signal applied between the input nodes in the differential stage.
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公开(公告)号：US09929706B2
公开(公告)日：2018-03-27
申请号：US15497313
申请日：2017-04-26
发明人： Marco Raimondi , Edoardo Botti
CPC分类号： H03F3/45932 , H03F1/0205 , H03F3/183 , H03F3/185 , H03F3/211 , H03F3/217 , H03F3/2173 , H03F2200/03 , H03F2200/129 , H03F2200/171 , H03F2200/258 , H03F2200/351 , H03F2200/78 , H03F2203/21106
摘要： A switching amplifier includes a first half-bridge PWM modulator, a second half-bridge PWM modulator, and at least one amplifier stage configured to receive input signals. The switching amplifier also includes a PWM control stage configured to control switching of the first PWM modulator and of the second PWM modulator as a function of the input signals, by respective first PWM control signals and second PWM control signals. The amplifier stage and the PWM control stage have a fully differential structure.
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公开(公告)号：US10531211B2
公开(公告)日：2020-01-07
申请号：US16135624
申请日：2018-09-19
发明人： Edoardo Botti , Marco Raimondi
摘要： A diagnostic circuit is used for detecting the load status of an audio amplifier. The audio amplifier includes two output terminals for connection to a speaker. The diagnostic circuit may include a first circuit, which configured to generate a first signal indicating whether a signal provided via the two output terminals comprises an audio signal. A second circuit can be configured to detect a first measurement signal being indicative for the output current provided via the two output terminals, and to compare the first measurement signal with at least one threshold in order to generate a second signal indicating whether the output current has a low current amplitude profile or a high current amplitude profile. A third circuit can be configured to generate a diagnostic signal as a function of the first and the second signal.
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公开(公告)号：US20170155381A1
公开(公告)日：2017-06-01
申请号：US15431374
申请日：2017-02-13
发明人： Marco Raimondi , Edoardo Botti
IPC分类号： H03K5/1252 , H03K4/08 , H03K7/08
摘要： A method is for reducing pulse skipping from a characteristic affecting a modulating signal input to an integrator of a pulse width modulation (PWM) modulator, together with a square wave carrier signal for generating a triangular waveform of the PWM modulator. The method may include creating a broad synchronous peak at vertexes of the triangular waveform output by the integrator.
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公开(公告)号：US09595946B2
公开(公告)日：2017-03-14
申请号：US14592364
申请日：2015-01-08
发明人： Marco Raimondi , Edoardo Botti
摘要： A method is for reducing pulse skipping from a characteristic affecting a modulating signal input to an integrator of a pulse width modulation (PWM) modulator, together with a square wave carrier signal for generating a triangular waveform of the PWM modulator. The method may include creating a broad synchronous peak at vertexes of the triangular waveform output by the integrator.
摘要翻译： 一种方法是从影响调制信号输入到脉冲宽度调制（PWM）调制器的积分器的特性以及用于产生PWM调制器的三角形波形的方波载波信号的特性减少脉冲跳跃。 该方法可以包括在由积分器输出的三角波形的顶点处创建宽同步峰。
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公开(公告)号：US11463078B2
公开(公告)日：2022-10-04
申请号：US17322100
申请日：2021-05-17
发明人： Marco Raimondi , Giovanni Gonano
摘要： An embodiment pulse-width modulation (PWM) modulator circuit comprises a first half-bridge stage having a first output node and a second half-bridge stage having a second output node. The first output node and the second output node are configured to have an electrical load coupled therebetween to apply thereto a PWM-modulated output signal. The circuit comprises a differential stage having input nodes configured to receive an input signal applied between the input nodes and produce a differential control signal for the first half-bridge stage and the second half-bridge stage. A current comparator is arranged intermediate the differential stage and the first and second half-bridge stages. The current comparator is configured to produce a PWM-modulated drive signal to drive the half-bridge stages as a function of the input signal applied between the input nodes in the differential stage.
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公开(公告)号：US20180323774A1
公开(公告)日：2018-11-08
申请号：US16031773
申请日：2018-07-10
发明人： Marco Raimondi , Edoardo Botti
摘要： A method is for reducing pulse skipping from a characteristic affecting a modulating signal input to an integrator of a pulse width modulation (PWM) modulator, together with a square wave carrier signal for generating a triangular waveform of the PWM modulator. The method may include creating a broad synchronous peak at vertexes of the triangular waveform output by the integrator.
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公开(公告)号：US10104483B2
公开(公告)日：2018-10-16
申请号：US15216579
申请日：2016-07-21
发明人： Edoardo Botti , Marco Raimondi
IPC分类号： H04R29/00
摘要： A diagnostic circuit is used for detecting the load status of an audio amplifier. The audio amplifier includes two output terminals for connection to a speaker. The diagnostic circuit may include a first circuit, which configured to generate a first signal indicating whether a signal provided via the two output terminals comprises an audio signal. A second circuit can be configured to detect a first measurement signal being indicative for the output current provided via the two output terminals, and to compare the first measurement signal with at least one threshold in order to generate a second signal indicating whether the output current has a low current amplitude profile or a high current amplitude profile. A third circuit can be configured to generate a diagnostic signal as a function of the first and the second signal.
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