公开(公告)号：US5430409A

公开(公告)日：1995-07-04

申请号：US319155

申请日：1994-10-06

申请人： Paul E. Buck ,  Mark W. Gose ,  Ian D. Jay

发明人： Paul E. Buck ,  Mark W. Gose ,  Ian D. Jay

IPC分类号： H03F1/32 ,  H03K5/153 ,  H03F1/30

CPC分类号： H03F1/3211 ,  H03K5/153

摘要： A circuit and method are provided for generating a clipping distortion detector output signal for an integrated circuit audio amplifier which is independent of operating temperature and supply voltage. The system includes an audio amplifier having a voltage gain, a first input for receiving an input voltage and an output for generating an amplified output voltage. A supply voltage is supplied to the audio amplifier and the supply voltage determines the maximum amplified output voltage. A comparison voltage is generated which is indicative of the output voltage divided by the voltage gain. A clip detector voltage comparator receives the input voltage and the comparison voltage and provides a clipping distortion detect signal when the input voltage deviates from the comparison voltage in excess of an offset voltage which is indicative of detection of excessive clipping distortion. According to one embodiment, the offset voltage is adaptively controlled as a function of the supply voltage so as to maintain a substantially constant maximum percent distortion. According to a second embodiment, the offset voltage is adjusted as a function of supply voltage to achieve an adjustable maximum percent distortion. In addition, the offset voltage is also controlled as a function of temperature to provide temperature compensation. The supply voltage and temperature compensation may be achieved by generating a current source as a function of supply voltage and temperature.

摘要翻译： 提供一种电路和方法，用于产生与工作温度和电源电压无关的集成电路音频放大器的限幅失真检测器输出信号。 该系统包括具有电压增益的音频放大器，用于接收输入电压的第一输入端和用于产生放大的输出电压的输出。 电源电压被提供给音频放大器，电源电压确定最大放大的输出电压。 产生指示输出电压除以电压增益的比较电压。 剪辑检测器电压比较器接收输入电压和比较电压，并且当输入电压偏离超过偏移电压的比较电压时提供削波失真检测信号，该偏移电压指示检测到过度的限幅失真。 根据一个实施例，偏移电压被自适应地控制为电源电压的函数，以便保持基本上恒定的最大百分比失真。 根据第二实施例，偏移电压被调整为电源电压的函数，以实现可调节的最大百分比失真。 此外，偏移电压也被控制为温度的函数以提供温度补偿。 可以通过产生作为电源电压和温度的函数的电流源来实现电源电压和温度补偿。

公开(公告)号：US5442316A

公开(公告)日：1995-08-15

申请号：US268750

申请日：1994-06-30

申请人： Paul E. Buck ,  Mark W. Gose ,  Ian D. Jay

发明人： Paul E. Buck ,  Mark W. Gose ,  Ian D. Jay

IPC分类号： H03F1/32 ,  H03K5/153 ,  H03F1/26 ,  H03F1/30

CPC分类号： H03F1/3211 ,  H03K5/153

摘要： A circuit and method are provided for generating a clipping distortion detector output signal for an integrated circuit audio amplifier which is independent of operating temperature and supply voltage. The system includes an audio amplifier having a voltage gain, a first input for receiving input voltage and an output for generating an amplified output voltage. A supply voltage is supplied to the audio amplifier and the supply voltage determines the maximum amplified output voltage. A comparison voltage is generated which is indicative of the output voltage divided by the voltage gain. A clip detector voltage comparator receives the input voltage and the comparison voltage and provides a clipping distortion detect signal when the input voltage deviates from the comparison voltage in excess of an offset voltage which is indicative of detection of excessive clipping distortion. The output voltage is adaptively controlled as a function of the supply voltage so as to maintain a substantially constant maximum percent distortion. In addition, the offset voltage is also controlled as a function of temperature to provide temperature compensation. The supply voltage and temperature compensation may be achieved by generating a current source as a function of supply voltage and temperature.

摘要翻译： 提供一种电路和方法，用于产生与工作温度和电源电压无关的集成电路音频放大器的限幅失真检测器输出信号。 该系统包括具有电压增益的音频放大器，用于接收输入电压的第一输入端和用于产生放大的输出电压的输出。 电源电压被提供给音频放大器，电源电压确定最大放大的输出电压。 产生指示输出电压除以电压增益的比较电压。 剪辑检测器电压比较器接收输入电压和比较电压，并且当输入电压偏离超过偏移电压的比较电压时提供削波失真检测信号，该偏移电压指示检测到过度的限幅失真。 输出电压被自适应地控制为电源电压的函数，以便保持基本上恒定的最大百分比失真。 此外，偏移电压也被控制为温度的函数以提供温度补偿。 可以通过产生作为电源电压和温度的函数的电流源来实现电源电压和温度补偿。

公开(公告)号：US06456153B2

公开(公告)日：2002-09-24

申请号：US09849323

申请日：2001-05-04

申请人： Paul E. Buck ,  Karl H. Jacobs ,  Barry J. Male

发明人： Paul E. Buck ,  Karl H. Jacobs ,  Barry J. Male

IPC分类号： G05F110

CPC分类号： H02M3/07

摘要： A regulated integrated circuit power supply (200) intermittently applies feedback to a charge pump (202) on a sampled basis such that a feedback circuit (204) is enabled to sense the bias voltage (Vout) at predetermined intervals of time. Based upon the value of the bias voltage (Vout) as compared to a threshold voltage (VT), the charge pump (202) is enabled to supply a voltage to the integrated circuit. Thereby, the regulated charge pump (202) does not overload the integrated circuit coupled thereto. The regulated integrated circuit power supply (200) includes the charge pump (202) coupled to the integrated circuit to supply bias voltage (Vout). Additionally, coupled to the integrated circuit, the feedback circuit (204) senses the bias voltage (Vout) and provides an output signal based upon a comparison between the bias voltage (Vout) and a voltage threshold (VT) A switch (208) connected to the feedback circuit (204) selectively enables and disables sensing of the bias voltage (Vout). A signal generator (210) provides at least one output signal. A controller (212) receives both output signals from the signal generator (210) and the feedback circuit (204) to provide a first and a second control signal (VA, VB). The first control signal (VA), responsive to the output signal of the signal generator (210), enables and disables the switch (208) at predetermined intervals. The second control signal (VB), however, responsive to both output signals, enables and disables the charge pump (202). Thus, since the bias voltage (Vout) is measured intermittently at predetermined intervals, the regulated integrated circuit power supply (200) does not unnecessarily load the integrated circuit nor increase power consumption.

摘要翻译： 调节集成电路电源（200）以抽样的方式间歇地向电荷泵（202）施加反馈，使得反馈电路（204）能够以预定的时间间隔感测偏置电压（Vout）。 基于与阈值电压（VT）相比的偏置电压（Vout）的值，电荷泵（202）能够向集成电路提供电压。 因此，调节电荷泵（202）不会使与其耦合的集成电路过载。 调节集成电路电源（200）包括耦合到集成电路以提供偏置电压（Vout）的电荷泵（202）。 另外，耦合到集成电路，反馈电路（204）感测偏置电压（Vout），并且基于偏置电压（Vout）与连接的电压阈值（VT）A开关（208）之间的比较来提供输出信号 反馈电路（204）选择性地启用和禁止偏置电压（Vout）的检测。 信号发生器（210）提供至少一个输出信号。 控制器（212）从信号发生器（210）和反馈电路（204）接收输出信号，以提供第一和第二控制信号（VA，VB）。 响应于信号发生器（210）的输出信号的第一控制信号（VA）以预定的间隔启用和禁用开关（208）。 然而，响应于两个输出信号的第二控制信号（VB）启用和禁用电荷泵（202）。 因此，由于以预定间隔间歇地测量偏置电压（Vout），所以调节集成电路电源（200）不会不必要地加载集成电路，也不会增加功耗。

公开(公告)号：US4990846A

公开(公告)日：1991-02-05

申请号：US498511

申请日：1990-03-26

申请人： Paul E. Buck ,  Robert J. Campbell ,  Debra E. Poppas ,  John R. Shreve ,  Richard J. Voss

发明人： Paul E. Buck ,  Robert J. Campbell ,  Debra E. Poppas ,  John R. Shreve ,  Richard J. Voss

IPC分类号： G05F1/46 ,  G05F3/22 ,  H02J7/14

CPC分类号： G05F1/463 ,  G05F3/225 ,  H02J7/1453 ,  Y10S323/907

摘要： A reference voltage developing circuit that develops a multiple slope reference voltage that is a function of temperature. The circuit has a plurality of base-emitter multipliers each of which includes a transistor and each of which develops an output voltage that is a function of the base-emitter voltage of the transistor of the multiplier. Since the base-emitter voltage varies with changes in temperature, each multiplier circuit develops a voltage that varies with changes in temperature. The multiplier circuits have different multiplier magnitudes to thereby provide temperature dependent output voltages that have different slopes. A voltage selector circuit is connected to the multiplier circuits and it provides an output voltage that corresponds to the higher of the output voltages developed by the multiplier circuits.

摘要翻译： 参考电压显影电路，其产生作为温度的函数的多个斜率参考电压。 该电路具有多个基极 - 发射极乘法器，每个基极 - 发射极放大器包括一个晶体管，并且其中的每一个产生作为乘法器的晶体管的基极 - 发射极电压的函数的输出电压。 由于基极 - 发射极电压随着温度的变化而变化，所以每个乘法器电路产生随温度变化而变化的电压。 乘法器电路具有不同的乘数，从而提供具有不同斜率的与温度相关的输出电压。 电压选择器电路连接到乘法器电路，并且其提供对应于由乘法器电路产生的较高输出电压的输出电压。