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公开(公告)号:US12117346B2
公开(公告)日:2024-10-15
申请号:US17738322
申请日:2022-05-06
CPC分类号: G01J5/34 , H01H3/0213 , H03F3/087 , H05B47/13
摘要: A control device may comprise a passive infrared sensing circuit configured to operate in a charging state to charge one or more capacitors to appropriate voltages for operation in an operational state of the sensing circuit. The sensing circuit may comprise a pyroelectric detector configured to generate an output signal in response to received infrared energy, and first and second amplifier circuits configured to amplify the output signal. The control device may comprise a control circuit coupled to receive a sensing signal from the second amplifier circuit. Prior to the operational state, a capacitor of the first amplifier circuit may charge through a diode coupled between an output and an inverting input of an operational amplifier. In addition, prior to the operational state, a capacitor of the passive infrared sensing circuit may charge through the control circuit until the magnitude of a voltage across the capacitor exceeds a threshold voltage.
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2.
公开(公告)号:US20230253932A1
公开(公告)日:2023-08-10
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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3.
公开(公告)号:US20230163729A1
公开(公告)日:2023-05-25
申请号:US18158791
申请日:2023-01-24
发明人: Stefan BARABAS , Joseph BALARDETA , Simon PANG , Scott DENTON
CPC分类号: H03F1/30 , H03F1/086 , H03F1/301 , H03F3/082 , H03F3/087 , H03G3/3084 , H01L31/02016 , H01L31/09 , H03F1/56 , H03F3/08 , H03F2200/129 , H03F2200/156 , H03F2200/453 , H03F2200/132
摘要: The present disclosure provides for process and temperature compensation in a transimpedance amplifier (TIA) using a dual replica via monitoring an output of a first TIA (transimpedance amplifier) and a second TIA; configuring a first gain level of the first TIA based on a feedback resistance and a reference current applied at an input to the first TIA; configuring a second gain level of the second TIA and a third TIA based on a control voltage; and amplifying a received electrical current to generate an output voltage using the third TIA according to the second gain level. In some embodiments, one or both of the second TIA and the third TIA include a configurable feedback impedance used in compensating for changes in the second gain level due to a temperature of the respective second or third TIA via the configurable feedback impedance of the respective second or third TIA.
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4.
公开(公告)号:US20190229689A1
公开(公告)日:2019-07-25
申请号:US16372164
申请日:2019-04-01
申请人: Luxtera, Inc.
发明人: Brian Welch
CPC分类号: H03F3/45237 , G01J1/44 , H03F1/34 , H03F3/087 , H03F3/45071 , H03F3/45076 , H03F3/45475 , H03F3/45968 , H03F2200/405 , H03F2203/45222 , H03F2203/45288 , H03F2203/45511 , H03F2203/45526
摘要: A system for a differential trans-impedance amplifier circuit comprising: an amplifier having a pair of input nodes and configured to generate an amplified replica of a differential voltage on said pair of input nodes; a photodiode; a pair of capacitors coupling said photodiode to said pair of input nodes; at least one resistance coupled between said pair of input nodes of said amplifier; and a bias network comprising two photodiode biasing resistances each photodiode biasing resistance coupled in series between said photodiode and a respective DC voltage. A feedback loop for the amplifier may include source followers that are operable to level shift voltages prior to coupling capacitors that couple said photodiode to said amplifier to ensure stable bias conditions for said amplifier. The source followers may include CMOS transistors. The amplifier may be integrated in a complementary metal-oxide semiconductor (CMOS) chip, which may include a CMOS photonics chip.
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公开(公告)号:US20180149587A1
公开(公告)日:2018-05-31
申请号:US15822398
申请日:2017-11-27
发明人: Kazuki SETSUDA , Naomichi CHIDA , Kazufumi NISHIDA
IPC分类号: G01N21/3559 , G01N21/359 , H03F3/08
CPC分类号: G01N21/3559 , G01N21/3151 , G01N21/359 , H03F3/085 , H03F3/087
摘要: A signal detection device according to one aspect of the present invention includes a receiver configured to receive a signal including at least a first signal component modulated by a first frequency and a second signal component modulated by a second frequency, and a detector configured to generate, using a base signal, a first reference signal to be used for detecting the first signal component and a second reference signal to be used for detecting the second signal component, perform lock-in detection on the signal received by the receiver using the first reference signal to obtain a first detection signal, perform lock-in detection on the signal received by the receiver using the second reference signal to obtain two second detection signals having different phases from each other, and change at least one of a frequency and a phase of each of the first and second reference signals to set one of the two second detection signals to zero.
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公开(公告)号:US20180131342A1
公开(公告)日:2018-05-10
申请号:US15587579
申请日:2017-05-05
CPC分类号: H03G3/30 , H02J7/0063 , H02J7/345 , H03F3/087 , H03F3/45475 , H03F3/45973 , H03F3/45977 , H03F2203/45021 , H03F2203/45114 , H03F2203/45116 , H03F2203/45212 , H03F2203/45288 , H03F2203/45528 , H03F2203/45536 , H04B10/6933
摘要: A transimpedance amplifier circuit includes a feedback control loop that generates a compensation current at an input of a transimpedance amplifier. The feedback control loop includes a differential integrator with an integration capacitor. A time constant associated with charging the integration capacitor is variable as a function of a pre-charge control signal. During a pre-charge phase, the pre-charge control signal is set to a first value so as to set the time constant associated with charging the integration capacitor to a first time constant value. During an operation phase, the pre-charge control signal is set to a second value so as to increase the time constant associated with charging the integration capacitor to a second time constant value greater than the first time constant value for the pre-charge phase.
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公开(公告)号:US20180059339A1
公开(公告)日:2018-03-01
申请号:US15679078
申请日:2017-08-16
发明人: Atul Gupta , Marek Tlalka , Vasilis Papanikolaou
IPC分类号: G02B6/42
CPC分类号: G02B6/425 , G02B6/4201 , G02B2006/12111 , G02B2006/12123 , G02B2006/12138 , H03F3/087
摘要: A transimpedance amplifier and photodiode that has a bias voltage node established at a bias voltage and a ground node/plane that connects, over a short distance as compared to the prior art, to a photodiode and a transimpedance amplifier. The photodiode is in a substrate and configured to receive and convert an optical signal to an electrical current. The photodiode has an anode terminal and a cathode terminal which is connected to the bias voltage node. One or more capacitors in or on the substrate and connected between the bias node and the ground node. The transimpedance amplifier has an input connected to the anode terminal of the photodiode and an output that presents a voltage representing the optical signal to an output path. The transimpedance amplifier and the photodiode are both electrically connected in a flip chip configuration and the ground plane creates a coplanar waveguide.
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公开(公告)号:US20180033814A1
公开(公告)日:2018-02-01
申请号:US15659583
申请日:2017-07-25
IPC分类号: H01L27/146 , H04B10/69 , G01J1/04 , H03G3/30 , H03F3/08
CPC分类号: H01L27/14601 , G01J1/0488 , G01J1/18 , G01J1/44 , G01J1/46 , H01L27/14643 , H03F3/087 , H03F3/45475 , H03F2203/45138 , H03F2203/45522 , H03F2203/45528 , H03G1/0088 , H03G3/001 , H03G3/3084 , H04B10/69
摘要: Some embodiments described herein are directed to a photo sensor and a method of operating a photo sensor. In an embodiment, a photo sensor comprises a photo diode, a filter circuit, and an output circuit. The filter circuit has an input node configured to be electrically coupled to an output node of the photo diode, and has an output node. The filter circuit has an adjustable gain, and the adjustable gain is adjustable based on a signal output from the filter circuit. The output circuit has an input node configured to be electrically coupled to the output node of the filter circuit.
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公开(公告)号:US09866414B2
公开(公告)日:2018-01-09
申请号:US14337004
申请日:2014-07-21
IPC分类号: H04L27/36 , H04L27/00 , H03F1/32 , H03F1/30 , H03F3/08 , H03F3/19 , H03F3/24 , H04W24/02 , H04L25/06 , H04L25/08
CPC分类号: H03F1/304 , H03F1/3241 , H03F1/3247 , H03F1/3258 , H03F3/087 , H03F3/19 , H03F3/24 , H03F2200/18 , H03F2200/204 , H03F2200/207 , H03F2200/447 , H03F2200/451 , H03F2201/3206 , H03F2201/3209 , H03F2201/3212 , H03F2201/3215 , H03F2201/3224 , H03F2201/3227 , H04L25/067 , H04L25/08 , H04L27/0008 , H04L27/368 , H04W24/02
摘要: A RF-digital hybrid mode power amplifier system for achieving high efficiency and high linearity in wideband communication systems is disclosed. The present invention is based on the method of adaptive digital predistortion to linearize a power amplifier in the RF domain. The present disclosure enables a power amplifier system to be field reconfigurable and support multi-modulation schemes (modulation agnostic), multi-carriers and multi-channels. As a result, the digital hybrid mode power amplifier system is particularly suitable for wireless transmission systems, such as base-stations, repeaters, and indoor signal coverage systems, where baseband I-Q signal information is not readily available.
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公开(公告)号:US20170346450A1
公开(公告)日:2017-11-30
申请号:US15606128
申请日:2017-05-26
申请人: Tymphany HK Limited
发明人: Sebastiaan de Vries
CPC分类号: H03F1/56 , H03F1/0227 , H03F1/083 , H03F1/3205 , H03F1/3211 , H03F3/087 , H03F3/183 , H03F3/185 , H03F3/187 , H03F3/45475 , H03F3/601 , H03F3/68 , H03F2200/03 , H03F2200/387 , H04R3/00 , H04R3/005 , H04R5/033 , H04R5/04
摘要: A pre-amplifier circuit including a microphone pre-amplifier stage with a direct injection (DI) unit that provides a high impedance source signal and a low impedance XLR connection operable without a line or mic switch.
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