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公开(公告)号：US20080270817A1
公开(公告)日：2008-10-30
申请号：US12166229
申请日：2008-07-01
IPC分类号： G06F1/12
CPC分类号： H03L1/022 , G06F1/08 , H03K3/0231
摘要： A precision oscillator for an asynchronous transmission system. An integrated system on a chip with serial asynchronous communication capabilities includes processing circuitry for performing predefined digital processing functions on the chip and having an associated on chip free running clock circuit for generating a temperature compensated clock. An on-chip UART is provided for digitally communicating with an off-chip UART, which off-chip UART has an independent time reference, which communication between the on-chip UART and the off-chip UART is effected without clock recovery. The on-chip UART has a time-base derived from the temperature compensated clock. The temperature compensated clock provides a time reference for both the processing circuitry and the on-chip UART.
摘要翻译： 用于异步传输系统的精密振荡器。 具有串行异步通信能力的集成在芯片上的系统包括处理电路，用于在芯片上执行预定义的数字处理功能，并具有相关的片上自由运行时钟电路，用于产生温度补偿时钟。 提供片上UART，用于与片外UART进行数字通信，该片外UART具有独立的时基参考，片上UART和片外UART之间的通信无需时钟恢复即可实现。 片内UART具有源自温度补偿时钟的时基。 温度补偿时钟为处理电路和片上UART提供时间参考。
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2.发明授权Circuits and methods for implementing audio Codecs and systems using the same 失效用于实现音频编解码器和使用其的系统的电路和方法公开(公告)号：US06259957B1
公开(公告)日：2001-07-10
申请号：US08833185
申请日：1997-04-04
IPC分类号： G06F1700
CPC分类号： G10L19/18
摘要： Audio data processing circuitry 300 includes a plurality of analog inputs 101 for receiving analog audio data and a digital input 105 for receiving digital audio data. A analog mixer 312 mixes analog data received at said plurality of analog inputs 101 to generate a mixed analog audio stream. An analog-to-digital converter 313 converts the mixed analog audio stream to a digital audio stream and a digital mixer 315 mixes digital data received at the digital input 105 with the digital audio stream from the analog mixer 312 to generate a mixed digital audio stream.
摘要翻译： 音频数据处理电路300包括用于接收模拟音频数据的多个模拟输入端101和用于接收数字音频数据的数字输入端105。 模拟混频器312混合在所述多个模拟输入端101处接收的模拟数据，以产生混合的模拟音频流。 模数转换器313将混合模拟音频流转换为数字音频流，数字混频器315将在数字输入端105接收的数字数据与来自模拟混频器312的数字音频流混合，以产生混合数字音频流 。
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公开(公告)号：US07395447B2
公开(公告)日：2008-07-01
申请号：US10244344
申请日：2002-09-16
IPC分类号： G06F1/12
CPC分类号： H03L1/022 , G06F1/08 , H03K3/0231
摘要： A precision oscillator for an asynchronous transmission system. An integrated system on a chip with serial asynchronous communication capabilities includes processing circuitry for performing predefined digital processing functions on the chip and having an associated on chip free running clock circuit for generating a temperature compensated clock. An asynchronous on-chip communication device is provided for digitally communicating with an off-chip asynchronous communication device, which off-chip asynchronous communication device has an independent time reference, which communication between the on-chip communication device and the off-chip asynchronous communication device is effected without clock recovery. The asynchronous on-chip communication device has a time-base derived from the temperature compensated clock. The temperature compensated clock provides a time reference for both the processing circuitry and the asynchronous on-chip communication device.
摘要翻译： 用于异步传输系统的精密振荡器。 具有串行异步通信能力的集成在芯片上的系统包括处理电路，用于在芯片上执行预定义的数字处理功能，并具有相关的片上自由运行时钟电路，用于产生温度补偿时钟。 提供了一种异步片上通信设备，用于与片外异步通信设备进行数字通信，该片外异步通信设备具有独立的时间参考，片上通信设备和片外异步通信之间的通信 器件无需时钟恢复即可实现。 异步片上通信设备具有从温度补偿时钟导出的时基。 温度补偿时钟为处理电路和异步片上通信设备提供时间参考。
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公开(公告)号：US08055932B2
公开(公告)日：2011-11-08
申请号：US12166229
申请日：2008-07-01
CPC分类号： H03L1/022 , G06F1/08 , H03K3/0231
摘要： A precision oscillator for an asynchronous transmission system. An integrated system on a chip with serial asynchronous communication capabilities includes processing circuitry for performing predefined digital processing functions on the chip and having an associated on chip free running clock circuit for generating a temperature compensated clock. An on-chip UART is provided for digitally communicating with an off-chip UART, which off-chip UART has an independent time reference, which communication between the on-chip UART and the off-chip UART is effected without clock recovery. The on-chip UART has a time-base derived from the temperature compensated clock. The temperature compensated clock provides a time reference for both the processing circuitry and the on-chip UART.
摘要翻译： 用于异步传输系统的精密振荡器。 具有串行异步通信能力的集成在芯片上的系统包括处理电路，用于在芯片上执行预定义的数字处理功能，并具有相关的片上自由运行时钟电路，用于产生温度补偿时钟。 提供片上UART，用于与片外UART进行数字通信，该片外UART具有独立的时基参考，片上UART和片外UART之间的通信无需时钟恢复即可实现。 片内UART具有源自温度补偿时钟的时基。 温度补偿时钟为处理电路和片上UART提供时间参考。
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公开(公告)号：US06980056B1
公开(公告)日：2005-12-27
申请号：US09711770
申请日：2000-11-13
CPC分类号： G10L19/18
摘要： An attenuator includes a first stage 601a having a first operational amplifier 602a and a tapped resistor 603a. Tapped resistor 603a has an input for receiving input data, an output coupled to an output of first operational amplifier 602a, and a plurality of taps for selectively presenting a sequence of voltages to a noninverting input of first operational amplifier 602a. Each of these sequences of voltages corresponds to an attenuation step such that first stage 601a steps the attenuation produced by the attenuator from an intermediate value to a predetermined ending value. A second stage 601b includes a second operational amplifier 602b and a tapped resistor 603b. Tapped resistor 603b includes an input for receiving analog data from first stage 601a, an output coupled to an output of second operational amplifier 602b, and a plurality of taps for selectively presenting a sequence of voltages to a noninverting input of operational amplifier 602b. Each of the sequence of voltages corresponds to an attenuation step, a second stage 601b stepping the attenuation from a predetermined starting value to the intermediate value.
摘要翻译： 衰减器包括具有第一运算放大器602a和分接电阻器603a的第一级601a。 分接电阻器603a具有用于接收输入数据的输入，耦合到第一运算放大器602a的输出的输出和用于选择性地向第一运算放大器602a的同相输入提供电压序列的多个抽头。 这些电压序列中的每一个对应于衰减步骤，使得第一级601将衰减器产生的衰减从中间值步进到预定的结束值。 第二级601b包括第二运算放大器602b和抽头电阻器603b。 分接电阻器603b包括用于接收来自第一级601a的模拟数据的输入，耦合到第二运算放大器602b的输出的输出以及用于选择性地向运算放大器602的非反相输入提供电压序列的多个抽头 b。 电压序列中的每一个对应于衰减步骤，第二阶段601b将衰减从预定起始值步进到中间值。
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公开(公告)号：US08307237B2
公开(公告)日：2012-11-06
申请号：US13244666
申请日：2011-09-25
CPC分类号： H03L1/022 , G06F1/08 , H03K3/0231
摘要： A precision oscillator for an asynchronous transmission system. An integrated system on a chip with serial asynchronous communication capabilities includes processing circuitry for performing predefined digital processing functions on the chip and having an associated on chip free running clock circuit for generating a temperature compensated clock. An on-chip UART is provided for digitally communicating with an off-chip UART, which off-chip UART has an independent time reference, which communication between the on-chip UART and the off-chip UART is effected without clock recovery. The on-chip UART has a time-base derived from the temperature compensated clock. The temperature compensated clock provides a time reference for both the processing circuitry and the on-chip UART.
摘要翻译： 用于异步传输系统的精密振荡器。 具有串行异步通信能力的集成在芯片上的系统包括处理电路，用于在芯片上执行预定义的数字处理功能，并具有相关的片上自由运行时钟电路，用于产生温度补偿时钟。 提供片上UART，用于与片外UART进行数字通信，该片外UART具有独立的时基参考，片上UART和片外UART之间的通信无需时钟恢复即可实现。 片内UART具有源自温度补偿时钟的时基。 温度补偿时钟为处理电路和片上UART提供时间参考。
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公开(公告)号：US20120036389A1
公开(公告)日：2012-02-09
申请号：US13244666
申请日：2011-09-25
IPC分类号： G06F1/04
CPC分类号： H03L1/022 , G06F1/08 , H03K3/0231
摘要： A precision oscillator for an asynchronous transmission system. An integrated system on a chip with serial asynchronous communication capabilities includes processing circuitry for performing predefined digital processing functions on the chip and having an associated on chip free running clock circuit for generating a temperature compensated clock. An on-chip UART is provided for digitally communicating with an off-chip UART, which off-chip UART has an independent time reference, which communication between the on-chip UART and the off-chip UART is effected without clock recovery. The on-chip UART has a time-base derived from the temperature compensated clock. The temperature compensated clock provides a time reference for both the processing circuitry and the on-chip UART.
摘要翻译： 用于异步传输系统的精密振荡器。 具有串行异步通信能力的集成在芯片上的系统包括处理电路，用于在芯片上执行预定义的数字处理功能，并具有相关的片上自由运行时钟电路，用于产生温度补偿时钟。 提供片上UART，用于与片外UART进行数字通信，该片外UART具有独立的时基参考，片上UART和片外UART之间的通信无需时钟恢复即可实现。 片内UART具有源自温度补偿时钟的时基。 温度补偿时钟为处理电路和片上UART提供时间参考。
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