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1. 发明授权

US4794247A Read-out amplifier for photovoltaic detector 失效
标题翻译：光电探测器读出放大器
公开(公告)号：US4794247A
公开(公告)日：1988-12-27
申请号：US98155
申请日：1987-09-18
申请人： John A. Stineman, Jr.
发明人： John A. Stineman, Jr.
IPC分类号： G11C7/06 , H03F3/08 , H03F17/00 , H04N5/33 , H01J40/14
CPC分类号： H03F3/082
摘要： A read-out amplifier (200) for a photovoltaic detector (201) employs an integrating amplifier (203) with capacitor feedback (230 ) during a self-calibrating active load (205, 240) to minimize debiasing of the photovoltaic detector during its operation. The self-calibrating active load reduces the effect of noise and threshold nonuniformities of the semiconductor devices (202, 203, 204, 205) used in the read-out amplifier circuitry.
摘要翻译：用于光电检测器（201）的读出放大器（200）在自校准有功负载（205,240）期间采用具有电容器反馈（230）的积分放大器（203），以最小化光伏检测器在其操作期间的去偏移。自校准有源负载降低了在读出放大器电路中使用的半导体器件（202,203,204,205）的噪声和阈值不均匀性的影响。

2. 发明授权

US4857725A Differential offset corrected current mirror 失效
标题翻译：差分补偿电流镜
公开(公告)号：US4857725A
公开(公告)日：1989-08-15
申请号：US215839
申请日：1988-07-06
申请人： Mark A. Goodnough , John A. Stineman, Jr. , Alan W. Hoffman
发明人： Mark A. Goodnough , John A. Stineman, Jr. , Alan W. Hoffman
IPC分类号： H03F1/30
CPC分类号： H03F1/303
摘要： A current mirror circuit 10 is coupled to a first and a second photodetector 18 and 20 and differentially couples together the two photodetectors to an amplifier 12 such that a resulting differential output current is independent of the intrinsic responsivity difference between the two photodetectors. The circuit includes a first transistor 14 having an input terminal coupled to an output terminal of the first photodetector and a second transistor 16 having an input terminal coupled to an output terminal of the second photodetector. A capacitance 22 is coupled between a control terminal of the first transistor and a control terminal of the second transistor, the control terminal of the first transistor further being coupled to the input terminal of the first transistor. A first switch 24 is coupled between the control terminal of the second transistor and the input terminal of the second transistor. A second switch 26 is coupled between the second transistor input terminal and an input of the transimpedance amplifier for coupling the output current signal to the transimpedance amplifier. Preferrably the transistors are MOSFETs operated in subthreshold. During calibration the first switch is closed and the photodetectors are illuminated by a reference flux. A voltage stored across the capacitance is shown to be expressive of the difference in threshold voltage between the two MOSFETs and also the logarithm of the ratio of detector responsivities.
摘要翻译：电流镜电路10耦合到第一和第二光电检测器18和20，并将两个光电检测器差分耦合到放大器12，使得所得到的差分输出电流与两个光电检测器之间的固有响应度差无关。电路包括具有耦合到第一光电检测器的输出端的输入端的第一晶体管14和具有耦合到第二光电检测器的输出端的输入端的第二晶体管16。电容22耦合在第一晶体管的控制端和第二晶体管的控制端之间，第一晶体管的控制端还耦合到第一晶体管的输入端。第一开关24耦合在第二晶体管的控制端和第二晶体管的输入端之间。第二开关26耦合在第二晶体管输入端和跨阻放大器的输入端之间，用于将输出电流信号耦合到跨阻放大器。晶体管优选以亚阈值运行的MOSFET。在校准期间，第一开关闭合，并且光电探测器被参考通量照亮。电容之间存储的电压被表示为两个MOSFET之间的阈值电压的差异以及检测器响应率的对数。

3. 发明授权

US07356588B2 Circuits and methods for detecting the presence of a powered device in a powered network 有权
标题翻译：用于检测供电网络中有源设备的存在的电路和方法
公开(公告)号：US07356588B2
公开(公告)日：2008-04-08
申请号：US10738824
申请日：2003-12-16
申请人： John A. Stineman, Jr. , Jacob Herbold
发明人： John A. Stineman, Jr. , Jacob Herbold
IPC分类号： G06F1/26
CPC分类号： H04L12/10
摘要： Circuits and methods for detecting the presence of a powered device in a powered network connection and removing power from the powered network connection when no powered device is present are disclosed. The circuits and methods involve applying a time-varying voltage signal into an analog amplifier circuit that converts the voltage into a current indicative of the impedance of the connection. The analog amplifier circuit may be implemented with a dual-output trans-conductance amplifier that provides a digital voltage to indicate the removal of the powered device from the powered network connection.
摘要翻译：公开了用于在没有供电设备的情况下检测在动力网络连接中的受电设备的存在和从被动网络连接中的电力的电路和方法。电路和方法包括将时变电压信号施加到将电压转换成指示连接阻抗的电流的模拟放大器电路中。模拟放大器电路可以用双输出跨导放大器实现，该双输出跨导放大器提供数字电压以指示从动力网络连接去除被动设备。

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