Switchable current source circuit and method
    21.
    发明授权
    Switchable current source circuit and method 有权
    可切换电流源电路及方法

    公开(公告)号:US08519694B2

    公开(公告)日:2013-08-27

    申请号:US13021598

    申请日:2011-02-04

    申请人: Marco Berkhout

    发明人: Marco Berkhout

    IPC分类号: G05F1/10

    摘要: A method and circuit for providing a switched current source output has a precharge mode, in which a charge storage device is charged to a reference voltage, and the gate of an output transistor is discharged. In a discharge mode, the charge storage device is discharged to the gate of the output transistor to raise the gate voltage by an amount depending on the charge flow.

    摘要翻译: 用于提供开关电流源输出的方法和电路具有预充电模式,其中电荷存储装置被充电到参考电压,并且输出晶体管的栅极被放电。 在放电模式中,电荷存储装置被放电到输出晶体管的栅极,以将栅极电压提高一定量,这取决于充电流量。

    AMPLIFIER AND AMPLIFIER CONTROL METHOD
    22.
    发明申请
    AMPLIFIER AND AMPLIFIER CONTROL METHOD 有权
    放大器和放大器控制方法

    公开(公告)号:US20120134514A1

    公开(公告)日:2012-05-31

    申请号:US13303007

    申请日:2011-11-22

    IPC分类号: H03F99/00 H03F3/217

    CPC分类号: H03F3/2178

    摘要: Disclosed is a class D amplifier comprising a modulation stage having a first input for receiving an input signal and an output for producing a modulated version of the input signal; a plurality of power stages, each power stage being responsive to said modulation stage and comprising a first switch and a second switch coupled in series between a first voltage source and a second voltage source, each power stage comprising an output node between the first switch and the second switch; and a power stage control circuit for measuring the input signal level and enabling a selected number of the power stages as a function of the measured input signal level. A method for controlling such a class D amplifier is also disclosed.

    摘要翻译: 公开了一种D类放大器,其包括具有用于接收输入信号的第一输入端和用于产生输入信号的调制版本的输出的调制级; 多个功率级,每个功率级响应于所述调制级并且包括串联耦合在第一电压源和第二电压源之间的第一开关和第二开关,每个功率级包括第一开关和第二开关之间的输出节点 第二个开关; 以及功率级控制电路,用于测量输入信号电平并且使得所选择的功率级数量作为测量的输入信号电平的函数。 还公开了一种用于控制这种D类放大器的方法。

    Plop noise avoidance for an amplifier
    23.
    发明授权
    Plop noise avoidance for an amplifier 有权
    放大器的噪声避免

    公开(公告)号:US08139786B2

    公开(公告)日:2012-03-20

    申请号:US11596790

    申请日:2005-05-09

    申请人: Marco Berkhout

    发明人: Marco Berkhout

    IPC分类号: H04B15/00

    摘要: The invention concerns a method and signal conversion device for avoiding undesirable noise in the start up of an amplifying device, as well as to an amplifying device including such a signal conversion device. The signal conversion device (12) comprises a variable gain providing unit (Q3, Q4, Q5, Q6), a voltage to current converter (Q1, Q2, R1, R2), a variable gain control unit (22) controlling the variable gain of the variable gain providing unit, and a bias current control unit (20) for controlling a first biasing current (IB1) of the voltage to current converter, for avoiding DC offset originating noise as well as noise originating from components of the signal conversion device.

    摘要翻译: 本发明涉及一种方法和信号转换装置,用于避免放大装置启动时的不期望的噪声,以及包括这种信号转换装置的放大装置。 信号转换装置(12)包括可变增益提供单元(Q3,Q4,Q5,Q6),电压 - 电流转换器(Q1,Q2,R1,R2),可变增益控制单元(22) 以及用于控制所述电压 - 电流转换器的第一偏置电流(IB1)的偏置电流控制单元(20),用于避免DC偏移起始噪声以及源自所述信号转换装置的部件的噪声 。

    Pulse width modulation circuit and class-D amplifier comprising the PWM circuit
    24.
    发明授权
    Pulse width modulation circuit and class-D amplifier comprising the PWM circuit 有权
    脉宽调制电路和包括PWM电路的D类放大器

    公开(公告)号:US08067980B2

    公开(公告)日:2011-11-29

    申请号:US12665734

    申请日:2008-06-19

    IPC分类号: H03F3/38

    摘要: A pulse width modulation (PWM) circuit comprises a first integrator (g m1) with a first feedback capacitor (C1), a second integrator (gm1) with a second feedback capacitor (C2) and a comparator (A0) having a first input (V1) connected to the output of the first integrator (gm1) and a second input (V2) connected to the output of the second integrator (gm2). A connection path comprising a resistor (R2) is established from the output of the first integrator (gm1) to an input of the second integrator (gm2). The first and second feedback capacitors (C1, C2) have capacities with a non-linear factor X(V) and a circuit with an inversely non-linear factor X−1(V) is arranged in the connection path between the output of the first integrator (gm1) and said input of the second integrator (gm2). The PWM circuit may form path of a Class-D amplifier.

    摘要翻译: 脉冲宽度调制(PWM)电路包括具有第一反馈电容器(C1)的第一积分器(g m1),具有第二反馈电容器(C2)的第二积分器(gm1)和具有第一输入的比较器(A0) V1)连接到第一积分器(gm1)的输出端和连接到第二积分器(gm2)的输出端的第二输入端(V2)。 从第一积分器(gm1)的输出到第二积分器(gm2)的输入,建立包括电阻器(R2)的连接路径。 第一和第二反馈电容器(C1,C2)具有非线性因子X(V)的电容,并且具有反非线性因子X-1(V)的电路被布置在 第一积分器(gm1)和第二积分器(gm2)的所述输入。 PWM电路可以形成D类放大器的路径。

    POWER AMPLIFIER
    25.
    发明申请
    POWER AMPLIFIER 有权
    功率放大器

    公开(公告)号:US20100321111A1

    公开(公告)日:2010-12-23

    申请号:US12446150

    申请日:2007-10-18

    申请人: Marco Berkhout

    发明人: Marco Berkhout

    IPC分类号: H03F3/217

    摘要: The invention refers to a power amplifier comprising a first transistor (MH) having a first main channel coupled between a positive power supply terminal (Vdd) and an output terminal (Vout), said first transistor having a control terminal driven by a first gate signal (Vgatehigh) provided by a high driver circuit, which is biased from a first voltage terminal (Vboot). The power amplifier further comprises a second transistor (ML) having a second main channel coupled between the output terminal and a negative power supply terminal (Vss), said second transistor having a second control terminal driven by a second gate signal (Vgatelow) provided by a low driver circuit, which is biased from a second voltage terminal (Vreg), and a switch circuit (10) coupled between the first voltage terminal (Vboot) and the second voltage terminal (Vreg), said switch circuit being controlled by the second gate Signal (Vgatelow).

    摘要翻译: 本发明涉及一种功率放大器,包括具有耦合在正电源端子(Vdd)和输出端子(Vout)之间的第一主通道的第一晶体管(MH),所述第一晶体管具有由第一栅极信号驱动的控制端子 (Vgatehigh)由高驱动电路提供,其由第一电压端子(Vboot)偏置。 功率放大器还包括具有耦合在输出端子和负电源端子(Vss)之间的第二主通道的第二晶体管(ML),所述第二晶体管具有由第二控制端子驱动的第二栅极信号(Vgatelow),第二栅极信号由 从第二电压端子(Vreg)偏置的低驱动器电路和耦合在第一电压端子(Vboot)和第二电压端子(Vreg)之间的开关电路(10),所述开关电路由第二电压端子 门信号(Vgatelow)。

    Power amplifier
    26.
    发明授权
    Power amplifier 有权
    功率放大器

    公开(公告)号:US07782135B2

    公开(公告)日:2010-08-24

    申请号:US12446965

    申请日:2007-10-18

    申请人: Marco Berkhout

    发明人: Marco Berkhout

    IPC分类号: H03F3/217

    摘要: A driver (Highside Driver, Lowside Driver) adapted to drive each of final transistors (MH, ML, Mpower) included in a power amplifier, the driver including: a first plurality of switches (Mpsiow, Mpmoderate, Mpfast) having their respective main current channels coupled between a bias voltage terminal (Vddx) and a control electrode of the respective final transistors (MH, ML, Mpower), said first plurality of switches (Mpsiow, Mpmoderate, Mpfast) being selectively turned ON for enabling a progressive charging of the respective control electrode of the final transistors (MH, ML, MPower), a second plurality of switches (Mnsiow, Mnfast) having their respective main current channels coupled between another bias voltage terminal (Vsource) and the control electrode of the respective final transistors (MH, ML, Mpower), said second plurality of switches (Mnsiow, Mnfast) being selectively switched ON until a current through the respective final transistors (MH, ML, Mpower) changes its polarity.

    摘要翻译: 适用于驱动包括在功率放大器中的每个最终晶体管(MH,ML,Mpower)的驱动器(Highside Driver,Lowside Driver),所述驱动器包括:具有各自主电流的第一多个开关(Mpsiow,Mpmoderate,Mpfast) 耦合在偏置电压端子(Vddx)和各个最终晶体管(MH,ML,Mpower)的控制电极之间的通道,所述第一多个开关(Mpsiow,Mpmoderate,Mpfast)被选择性地接通,以使得能够对 最终晶体管(MH,ML,MPower)的相应控制电极,其各自的主电流通道的第二多个开关(Mnsiow,Mnfast)耦合在另一个偏置电压端子(Vsource)和各个最终晶体管的控制电极 MH,ML,Mpower),所述第二多个开关(Mnsiow,Mnfast)被选择性地导通,直到通过各个最终晶体管(MH,ML,Mpower)的电流改变其极性。

    CLASS D AUDIO AMPLIFIER
    28.
    发明申请
    CLASS D AUDIO AMPLIFIER 有权
    CLASS D音频放大器

    公开(公告)号:US20090315623A1

    公开(公告)日:2009-12-24

    申请号:US12307457

    申请日:2007-07-04

    IPC分类号: H03F3/217

    摘要: A class D amplifier (1) comprises an input unit (11) for receiving a digital input signal (Vin), a pulse shaping unit (12) for producing pulse shaped signals in dependence of the input signal (Vin), a comparator unit (13) for comparing the pulse shaped signals and producing a comparator signal, a driver unit (14) for producing driver signals in dependence of the comparator signal, a switching output unit (15) for producing a pulse width modulated output signal (Vout) in dependence of the driver signals, and a feedback unit (16) for feeding the output signal (Vout) back to the pulse shaping unit (12). The input unit (11) comprises a clipping control unit (10) for controlling the duty cycle of the pulse width modulated output signal (Vout).

    摘要翻译: D类放大器(1)包括用于接收数字输入信号(Vin)的输入单元(11),用于根据输入信号(Vin)产生脉冲形信号的脉冲整形单元(12),比较器单元 13),用于比较脉冲形状信号并产生比较器信号;驱动单元(14),用于根据比较器信号产生驱动信号;切换输出单元(15),用于产生脉宽调制输出信号 驱动器信号的依赖性,以及用于将输出信号(Vout)馈送回脉冲整形单元(12)的反馈单元(16)。 输入单元(11)包括用于控制脉宽调制输出信号(Vout)的占空比的限幅控制单元(10)。

    PWM limiter
    29.
    发明授权
    PWM limiter 有权
    PWM限幅器

    公开(公告)号:US06577186B2

    公开(公告)日:2003-06-10

    申请号:US09864140

    申请日:2001-05-24

    申请人: Marco Berkhout

    发明人: Marco Berkhout

    IPC分类号: H03F338

    CPC分类号: H03F3/217

    摘要: A push-pull amplifier comprises a pulse width modulator with a limiter for limiting the modulation depth, whereby the problem that the output is switched to either highside or lowside is prevented, and thus the carrier frequency is always present in the output spectrum and the bootstrap capacitor is recharged each clock-cycle.

    摘要翻译: 推挽放大器包括具有限制器的脉宽调制器,用于限制调制深度,从而防止输出切换到高边或低边的问题,因此载波频率总是存在于输出频谱和引导 每个时钟周期对电容器进行充电。