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1. 发明申请

US20070205826A1 System and method for demodulating amplitude modulated signals 失效
标题翻译：用于解调幅度调制信号的系统和方法
公开(公告)号：US20070205826A1
公开(公告)日：2007-09-06
申请号：US11266916
申请日：2005-11-04
申请人： Lian-Chun Xu , Kok-Soon Yeo , Chee-Keong Teo , John Asuncion , Wai Tai
发明人： Lian-Chun Xu , Kok-Soon Yeo , Chee-Keong Teo , John Asuncion , Wai Tai
IPC分类号： H03D1/00
CPC分类号： H03D1/18
摘要： A system and method for demodulating amplitude modulated input signals uses two comparators and a charge pump circuit, which is positioned between the two comparators, to produce a demodulated signal of an amplitude modulated input signal. The two comparators and the charge pump circuit form a demodulating unit that may be a part of an infrared remote control receiver. The first comparator converts the input signal from a waveform to a pulse form. The charge pump circuit then converts the pulse signal into an integrated signal in a triangular pulse form. The second comparator converts the integrated signal from a triangular pulse form to a rectangular pulse form to produce the demodulated signal.
摘要翻译：用于解调幅度调制输入信号的系统和方法使用位于两个比较器之间的两个比较器和电荷泵电路，以产生调幅输入信号的解调信号。两个比较器和电荷泵电路形成可以是红外遥控接收器的一部分的解调单元。第一个比较器将输入信号从波形转换为脉冲形式。然后，电荷泵电路将脉冲信号转换为三角形脉冲形式的积分信号。第二比较器将积分信号从三角形脉冲形式转换为矩形脉冲形式以产生解调信号。

2. 发明申请

US20070040543A1 Bandgap reference circuit 审中-公开
标题翻译：带隙参考电路
公开(公告)号：US20070040543A1
公开(公告)日：2007-02-22
申请号：US11204352
申请日：2005-08-16
申请人： Kok-Soon Yeo , Lian-Chun Xu , Wai Tai , Chee-Keong Teo , John Asuncion
发明人： Kok-Soon Yeo , Lian-Chun Xu , Wai Tai , Chee-Keong Teo , John Asuncion
IPC分类号： G05F3/16 , G05F3/20
CPC分类号： G05F3/30
摘要： A bandgap circuit includes a current mirror that generates a proportional to absolute temperature current at an output node that outputs the bandgap reference voltage. A first current path including a first resistor is coupled between the output node and a first bipolar transistor. The second current path including a second resistor is coupled between the output node and a second bipolar transistor. The first current path is parallel to the second current path. The circuit outputs a bandgap reference voltage.
摘要翻译：带隙电路包括在输出带隙参考电压的输出节点处产生与绝对温度电流成正比的电流镜。包括第一电阻器的第一电流路径被耦合在输出节点和第一双极晶体管之间。包括第二电阻器的第二电流路径耦合在输出节点和第二双极晶体管之间。第一电流路径平行于第二电流路径。电路输出带隙参考电压。

3. 发明申请

US20060081779A1 Variable noise control for an optical transducer 有权
标题翻译：用于光学传感器的可变噪声控制
公开(公告)号：US20060081779A1
公开(公告)日：2006-04-20
申请号：US10968564
申请日：2004-10-18
申请人： Kok-Soon Yeo , Lian-Chun Xu , Chee-Keong Teo , John Asuncion
发明人： Kok-Soon Yeo , Lian-Chun Xu , Chee-Keong Teo , John Asuncion
IPC分类号： G01J5/00
CPC分类号： H04B10/58
摘要： In one embodiment, an optical transducer, such as an infrared transducer, generates an output signal that is representative of optical irradiance. A noise control circuit is coupled in a power supply path of the optical transducer. A switching circuit varies the noise control provided by the noise control circuit, in response to changes in the output signal of the optical transducer. The noise control may be varied in a number of different ways, including: turning the noise control on or off, varying the noise control in discrete steps, or varying the noise control in a continuous manner. Methods for varying noise control in response to optical irradiance of an optical transducer are also disclosed.
摘要翻译：在一个实施例中，诸如红外换能器的光学换能器产生代表光学辐照度的输出信号。噪声控制电路耦合在光学换能器的电源路径中。响应于光学换能器的输出信号的变化，开关电路改变由噪声控制电路提供的噪声控制。噪声控制可以以多种不同的方式变化，包括：打开或关闭噪声控制，以离散步骤改变噪声控制，或以连续的方式改变噪声控制。还公开了响应于光学换能器的光学辐照而改变噪声控制的方法。

4. 发明申请

US20070139118A1 Fast-settling digital automatic gain control 失效
标题翻译：快速建立数字自动增益控制
公开(公告)号：US20070139118A1
公开(公告)日：2007-06-21
申请号：US11312089
申请日：2005-12-20
申请人： Chee Teo , Lian-Chun Xu , Kok-Soon Yeo , John Asuncion , Wai Tai
发明人： Chee Teo , Lian-Chun Xu , Kok-Soon Yeo , John Asuncion , Wai Tai
IPC分类号： H03G3/10
CPC分类号： H03G3/001 , H03G1/0088
摘要： A fast-settling digital automatic gain control circuit comprises first and second gain-controllable amplifiers in series. Each amplifier can be digitally switched between minimum and maximum gains by control logic that receives inputs from a multi-level voltage comparator. A peak detector connected to the output of the first gain-controlled amplifier is used to set the overall operating ranges for several threshold detectors. Four reference voltages are generated from the peak detector. The highest reference voltage is used to clock and reset the gain control logic with a hysteresis comparator to the instantaneous input signal from the first gain-controlled amplifier. The three other lower reference voltages are used to provide three-bits of digital input data to the gain control logic. Two digital controls are output, a min/max gain bit for the first gain-controlled amplifier, and a similar min/max gain bit for the second gain-controlled amplifier.
摘要翻译：快速稳定的数字自动增益控制电路包括串联的第一和第二增益可控放大器。每个放大器可以通过从多电平电压比较器接收输入的控制逻辑在最小和最大增益之间进行数字切换。连接到第一增益控制放大器的输出端的峰值检测器用于设置多个阈值检测器的总体工作范围。从峰值检测器产生四个参考电压。最高参考电压用于使用滞后比较器对增益控制逻辑进行时钟并复位为来自第一增益控制放大器的瞬时输入信号。三个较低的参考电压用于向增益控制逻辑提供三位数字输入数据。输出两个数字控制，第一增益控制放大器的最小/最大增益位，以及第二增益控制放大器的类似最小/最大增益位。

5. 发明申请

US20060208164A1 Photodiode circuit with improved response time 失效
标题翻译：光电二极管电路具有改善的响应时间
公开(公告)号：US20060208164A1
公开(公告)日：2006-09-21
申请号：US11084584
申请日：2005-03-18
申请人： Chee Teo , John Asuncion , Kok Yeo , Lian Xu , Wai Tai
发明人： Chee Teo , John Asuncion , Kok Yeo , Lian Xu , Wai Tai
IPC分类号： H01L31/00 , H01J40/14
CPC分类号： H01L31/101 , H01L31/105
摘要： A circuit has a voltage source, a node, a photodiode electrically coupled between the voltage source and the node, a voltage reference, a resistor electrically coupled between the node and the voltage reference, and a voltage clamp electrically connected to the node.
摘要翻译：电路具有电压源，节点，耦合在电压源和节点之间的光电二极管，电压基准，电耦合在节点和电压基准之间的电阻器，以及电连接到节点的电压钳。

6. 发明申请

US20070086790A1 Optical receiver with matched photodetector capacitance 失效
标题翻译：具有匹配光电探测器电容的光接收器
公开(公告)号：US20070086790A1
公开(公告)日：2007-04-19
申请号：US11250329
申请日：2005-10-13
申请人： Wai Tai , Kok Yeo , Chee Teo , John Asuncion , Lian Xu
发明人： Wai Tai , Kok Yeo , Chee Teo , John Asuncion , Lian Xu
IPC分类号： H04B10/06
CPC分类号： H04B10/66
摘要： An optical receiver has a voltage supply, a first node, and a second node. A first input of a differential amplifier is coupled to the first node and a second input of the differential amplifier is coupled to the second node. A photodetector is coupled between the voltage supply and the first node, which produces a photodetector capacitance. A programmable variable capacitor having a capacitance selectively matched to the photodetector capacitance is coupled between the voltage supply and the second node.
摘要翻译：光接收器具有电压源，第一节点和第二节点。差分放大器的第一输入耦合到第一节点，并且差分放大器的第二输入端耦合到第二节点。光电检测器耦合在电压源和第一节点之间，其产生光电检测器电容。具有与光电检测器电容有选择性匹配的电容的可编程可变电容器被耦合在电压源和第二节点之间。

7. 发明申请

US20060216042A1 Automatic gain control circuit for infrared receiver 审中-公开
标题翻译：红外线接收机自动增益控制电路
公开(公告)号：US20060216042A1
公开(公告)日：2006-09-28
申请号：US11089835
申请日：2005-03-24
申请人： Kok Yeo , Lian Xu , Chee Teo , John Asuncion , Wai Tai
发明人： Kok Yeo , Lian Xu , Chee Teo , John Asuncion , Wai Tai
IPC分类号： H04B10/06
CPC分类号： H04B10/66 , H03G3/3084
摘要： An optical receiver includes a photodetector coupled to a gain section having a variable gain stage. The gain stage provides an output voltage signal. A digital automatic gain control circuit is coupled to the output voltage signal and provides a digital output value to at least the variable gain stage. The gain of the variable gain stage is set according to the digital output value.
摘要翻译：光接收器包括耦合到具有可变增益级的增益部分的光电检测器。增益级提供输出电压信号。数字自动增益控制电路耦合到输出电压信号，并将数字输出值提供给至少可变增益级。可变增益级的增益根据数字输出值进行设置。

8. 发明申请

US20060291114A1 Electrostatic discharge protection circuit and method 审中-公开
标题翻译：静电放电保护电路及方法
公开(公告)号：US20060291114A1
公开(公告)日：2006-12-28
申请号：US11166176
申请日：2005-06-27
申请人： Chee Teo , John Asuncion , Kok Yeo , Lian Xu , Wal Tai
发明人： Chee Teo , John Asuncion , Kok Yeo , Lian Xu , Wal Tai
IPC分类号： H02H9/00
CPC分类号： H03F1/08 , H01L27/0251 , H03F1/52 , H03F3/08 , H03F3/345
摘要： A circuit that protects against electrostatic discharge and electrical over stress is provided. The circuit includes a first transistor including a substrate. An internal predetermined voltage source biases the substrate of the first transistor. The internal predetermined voltage source is greater than or equal to a source voltage provided to a source of the first transistor and isolates a substrate voltage of the first transistor from a supply voltage of the circuit. A first resistor is coupled to a gate of the first transistor and ground. The circuit also includes a zener diode coupled between ground and the supply voltage of the circuit. The zener diode shorts to ground if the supply voltage of the circuit exceeds the breakdown voltage of the zener diode.
摘要翻译：提供了防止静电放电和电应力过大的电路。电路包括包括衬底的第一晶体管。内部预定电压源偏置第一晶体管的衬底。内部预定电压源大于或等于提供给第一晶体管的源极的源极电压，并将第一晶体管的衬底电压与电路的电源电压隔离开来。第一电阻器耦合到第一晶体管的栅极并接地。该电路还包括耦合在地之间的齐纳二极管和电路的电源电压。如果电路的电源电压超过齐纳二极管的击穿电压，则齐纳二极管接地。

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