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1.发明公开公开(公告)号：US20240267655A1
公开(公告)日：2024-08-08
申请号：US18165663
申请日：2023-02-07
申请人： Raytheon Company
发明人： Bryan W. Kean
IPC分类号： H04N25/778 , H03F3/08 , H04N25/709
CPC分类号： H04N25/778 , H03F3/087 , H04N25/709
摘要： An apparatus includes a photodetector configured to generate an electrical current based on received illumination. The apparatus also includes a capacitor transimpedance amplifier (CTIA) unit cell having (i) an amplifier configured to receive the electrical current and a first reference voltage and generate a pre-integration voltage, (ii) a feedback capacitor coupled in parallel across the amplifier, (iii) a reset switch coupled in parallel across the feedback capacitor, and (iv) a coupling capacitor coupled to an output of the amplifier and configured to receive the pre-integration voltage and generate an integration voltage. The apparatus further includes a comparator configured to compare the pre-integration voltage and a second reference voltage, where generation of the integration voltage is modifiable based on the comparison.
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2.发明公开公开(公告)号：US20240267006A1
公开(公告)日：2024-08-08
申请号：US18165713
申请日：2023-02-07
申请人： Raytheon Company
发明人： Bryan W. Kean
CPC分类号： H03F3/087 , H03F1/083 , H03F3/005 , H03F2203/45551
摘要： An apparatus includes a photodetector configured to generate an electrical current based on received illumination. The apparatus also includes a capacitor transimpedance amplifier (CTIA) unit cell configured to generate an integration voltage based on the electrical current. The CTIA unit cell includes (i) an amplifier configured to receive the electrical current and a first reference voltage, (ii) a feedback capacitor coupled in parallel across the amplifier, and (iii) a reset switch coupled in parallel across the feedback capacitor. The apparatus further includes a comparator configured to compare an input voltage of the amplifier and a second reference voltage, where generation of the integration voltage is modifiable based on the comparison.
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公开(公告)号：US20240146256A1
公开(公告)日：2024-05-02
申请号：US18406864
申请日：2024-01-08
CPC分类号： H03F3/082 , H03F1/342 , H03F2200/144 , H03F2200/441
摘要： Embodiments of this application disclose a trans-impedance amplifier and a trans-impedance amplifier control method that are used in the field of circuit technologies. A trans-impedance amplifier TIA includes an inverting amplification circuit and a voltage clamping circuit. The inverting amplification circuit is connected in parallel to the voltage clamping circuit. The inverting amplification circuit includes a first PMOS transistor and a first NMOS transistor that have a common gate. A source of the first PMOS transistor is connected to a drain of the first NMOS transistor. The voltage clamping circuit includes a second PMOS transistor and a second NMOS transistor that have a common gate. Gates of the two transistors are connected to an input end of the TIA. A source of the second NMOS transistor and a drain of the second PMOS transistor are connected to an output end of the TIA.
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公开(公告)号：US11973478B2
公开(公告)日：2024-04-30
申请号：US17464763
申请日：2021-09-02
发明人： Xu Zhang , Mingming Zhang , Hanqing Zhao , Lukun Zhai , Dan Liu , Xuan Li
CPC分类号： H03F3/45475 , H04B10/6911
摘要： Apparatuses include (among other components) a first gain device connected to receive an initial voltage, a second gain device in series with the first gain device and connected to receive output of the first gain device, differential gain devices connected to receive outputs from the first gain device and the second gain device (the differential gain devices provide opposite voltage outputs from the apparatus) and high-frequency compensation feed-forward paths connected to the first gain device and the second gain device.
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公开(公告)号：US11874213B2
公开(公告)日：2024-01-16
申请号：US17201853
申请日：2021-03-15
CPC分类号： G01N15/1434 , G01R27/02 , H03F3/08 , G01N2015/149
摘要： Aspects of the present disclosure include methods for adjusting sensitivity of a photodiode in a light detection system. Methods according to certain embodiments include detecting light with a light detection system having a photodiode and an amplifier, determining responsivity of the photodiode over a plurality of wavelengths of light and adjusting one or more parameters of the amplifier in response to the responsivity of the photodiode over the plurality of wavelengths of light. Systems (e.g., particle analyzers) having a light source and a light detection system that includes a photodiode and an amplifier for practicing the subject methods are also described. Non-transitory computer readable storage medium are also provided.
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公开(公告)号：US11843355B2
公开(公告)日：2023-12-12
申请号：US17649994
申请日：2022-02-04
申请人： Raytheon Company
摘要： An apparatus includes a photodetector configured to generate an electrical current based on received illumination. The apparatus also includes a capacitor transimpedance amplifier (CTIA) unit cell having (i) an amplifier configured to receive the electrical current and a reference voltage, (ii) a feedback capacitor coupled in parallel across the amplifier, and (iii) a reset switch coupled in parallel across the feedback capacitor. The apparatus further includes an event detector configured to sense a high-energy event affecting the photodetector. In addition, the apparatus includes a switchable clamp coupled across inputs of the amplifier, where the event detector is configured to close the switchable clamp in response to sensing the high-energy event.
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公开(公告)号：US11777452B1
公开(公告)日：2023-10-03
申请号：US18041203
申请日：2021-12-24
发明人： Zhicong Luo , Jinghu Li , Riqing Chen , Haofan Ding , Xin Hong , Jianhai Yu , Hanghui Tu
CPC分类号： H03F1/301 , H03F1/42 , H03F3/45179 , H03F2200/36 , H03F2200/447
摘要： A high-speed transimpedance amplifier with bandwidth extension feature over full temperature range and bandwidth extension method belong to the field of integrated circuit. The present invention solves the problem existed in boosting core amplifier bandwidth technology over full temperature range. The present invention includes a preamplifier TIA, a phase splitting stage PS, a pre-driver stage Pre-Drive, an output buffer BUFF and an offset cancelation circuit OC. The preamplifier TIA adopts the gate-drain voltage cancelation technology to expand the bandwidth, so that its −3 dB bandwidth is greater than twice the closed-loop bandwidth of the first-order TIA. The pre-driver stage Pre-Drive is used to drive the output buffer BUFF. By adjusting the source-level negative feedback capacitance value of the pre-driver stage Pre-Drive circuit to generate a high-frequency gain that varies with temperature, the preamplifier TIA bandwidth differences under different temperature conditions are compensated.
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公开(公告)号：US11774294B2
公开(公告)日：2023-10-03
申请号：US17063304
申请日：2020-10-05
发明人： Suhwan Kim
CPC分类号： G01K3/005 , H03F3/16 , H03F3/45475 , H03F3/45744 , G01K2219/00 , G01N15/02 , G01N15/0205 , H03F3/005 , H03F3/087 , H03F3/45968 , H03F2200/375
摘要： An amplifier includes an amplification circuit including an input circuit receiving an input signal and configured to output an output signal by amplifying the input signal; and an offset cancelling circuit configured to cancel offset by controlling the input circuit according to activation control signal and offset control signal, wherein the offset cancelling circuit cancels the offset according to the offset control signal after the activation control signal is activated.
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公开(公告)号：US11626849B2
公开(公告)日：2023-04-11
申请号：US17349086
申请日：2021-06-16
发明人： Toshihiko Kyakuno
摘要： An amplifier circuit includes: an operational amplifier that includes two input terminals and an output terminal; a voltage-dividing resistor circuit electrically connected to the output terminal and that includes a voltage-dividing terminal that outputs a potential obtained by voltage-dividing a potential of the output terminal and a feedback resistor circuit electrically connected to the voltage-dividing terminal and one of the two input terminals. The voltage-dividing resistor circuit includes a plurality of resistors that each include terminals and a switch. The plurality of resistors includes a first resistor and a second resistor. The first resistor includes a terminal that corresponds to the voltage-dividing terminal. The switch switches, from a first terminal of the first resistor to a second terminal of the second resistor, the terminal that corresponds to the voltage-dividing terminal.
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公开(公告)号：US11555897B2
公开(公告)日：2023-01-17
申请号：US16430391
申请日：2019-06-03
发明人： Yalcin Alper Eken , Mehmet Arda Akkaya , Alp Oguz
IPC分类号： H03F3/08 , G01S7/4861 , H03F1/08 , G01S17/10 , H03F1/34
摘要： Mechanisms for evaluating amplitude for current pulses provided to a transimpedance amplifier (TIA) for current levels beyond the linear range of the TIA where clipping circuit(s) may limit the input voltage of the TIA are disclosed. In one aspect, an example TIA arrangement includes a clipping arrangement that includes multiple clipping circuits. Each clipping circuit can be biased by different bias voltages such that the different clipping circuits are activated at different input current amplitudes. Different clipping circuits can have different impedances, which can result in different recovery time characteristics. With the multiple clipping circuits in clipping arrangements discussed herein, a saturated dynamic range of a TIA can be divided into sub-regions and different pulse widening characteristics for each region may be defined, which may enable determination of amplitude for current pulses provided to the TIA even for current levels beyond the linear range of the TIA.
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