专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US07561812B2 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：US07561812B2
公开(公告)日：2009-07-14
申请号：US11250329
申请日：2005-10-13
申请人： Wai Keat Tai , Kok Soon Yeo , Chee Keong Teo , John Julius Asuncion , Lian Chun Xu
发明人： Wai Keat Tai , Kok Soon Yeo , Chee Keong Teo , John Julius Asuncion , Lian Chun 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。

2. 发明授权

US07265626B2 Fast-setting digital automatic gain control 失效
标题翻译：快速设置数字自动增益控制
公开(公告)号：US07265626B2
公开(公告)日：2007-09-04
申请号：US11312089
申请日：2005-12-20
申请人： Chee Keong Teo , Lian-Chun Xu , Kok-Soon Yeo , John Julius Asuncion , Wai Keat Tai
发明人： Chee Keong Teo , Lian-Chun Xu , Kok-Soon Yeo , John Julius Asuncion , Wai Keat 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。

3. 发明授权

US07220953B2 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：US07220953B2
公开(公告)日：2007-05-22
申请号：US11084584
申请日：2005-03-18
申请人： Chee Keong Teo , John Julius Asuncion , Kok Soon Yeo , Lian Chun Xu , Wai Keat Tal
发明人： Chee Keong Teo , John Julius Asuncion , Kok Soon Yeo , Lian Chun Xu , Wai Keat Tal
IPC分类号： G01J1/44 , H01L31/00 , H03K5/08
CPC分类号： H01L31/101 , H01L31/105
摘要： A circuit has a voltage source, a node, a photodetector electrically coupled between the voltage source and the node, a resistor electrically coupled between the node and ground, and a voltage clamp electrically connected to the node, the voltage clamp configured to maintain a reverse bias of the photodetector above a predetermined level.
摘要翻译：电路具有电压源，节点，电耦合在电压源和节点之间的光电检测器，电耦合在节点和地之间的电阻器以及电连接到该节点的电压钳，该电压钳配置为保持反向光电检测器的偏压高于预定水平。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式