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公开(公告)号：US11221452B2
公开(公告)日：2022-01-11
申请号：US16699490
申请日：2019-11-29
发明人： Vasilis Papanikolaou , Marek Tlalka , Atul Gupta
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：US20200096711A1
公开(公告)日：2020-03-26
申请号：US16699490
申请日：2019-11-29
发明人： Vasilis Papanikolaou , Marek Tlalka , Atul Gupta
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：US10911052B2
公开(公告)日：2021-02-02
申请号：US16421376
申请日：2019-05-23
IPC分类号： H03L7/081 , H04L27/227 , G04F10/00 , G06F1/06 , G06F1/12 , G06F1/10 , H04L25/49 , H04L7/033 , H04L27/38 , H04L7/00
摘要： A system for retiming a multi-level signal that forms an eye diagram when plotted, such as a PAM4 signal that includes an equalizer configured to create an equalized signal and a first amplifier configured to amplify the equalized signal, responsive to a first amplifier control signal, to create a first amplified signal, and a second amplifier configured to amplify the equalized signal, responsive to a second amplifier control signal, to create a second amplified signal. An eye monitor processes the equalized signal, the first amplified signal, and the second amplified signal to create a first retiming clock phase signal and a second retiming clock phase signal, which control sampling times for flip-flops. One or more delays and one or more emphasis modules are configured to delay and introduce emphasis into an output from the flip-flops, the resulting signals are combined in a summing junction to create the retimed signal.
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公开(公告)号：US20200007133A1
公开(公告)日：2020-01-02
申请号：US16421376
申请日：2019-05-23
摘要： A system for retiming a multi-level signal that forms an eye diagram when plotted, such as a PAM4 signal that includes an equalizer configured to create an equalized signal and a first amplifier configured to amplify the equalized signal, responsive to a first amplifier control signal, to create a first amplified signal, and a second amplifier configured to amplify the equalized signal, responsive to a second amplifier control signal, to create a second amplified signal. An eye monitor processes the equalized signal, the first amplified signal, and the second amplified signal to create a first retiming clock phase signal and a second retiming clock phase signal, which control sampling times for flip-flops. One or more delays and one or more emphasis modules are configured to delay and introduce emphasis into an output from the flip-flops, the resulting signals are combined in a summing junction to create the retimed signal.
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公开(公告)号：US10097908B2
公开(公告)日：2018-10-09
申请号：US14588267
申请日：2014-12-31
摘要： An optical signal module including a driver and an optical signal module. The driver includes a differential pair configured to receive and process an input signal to create a drive signal. A modulation current source provides a modulation current to the differential pair. One or more termination resistors connected to the differential pair for impedance matching. A first switch, responsive to a first control signal, maintains charge on a charge storage device. The optical signal module includes an optical signal generator arranged between a supply voltage node and a bias current node. The optical signal generator receives the drive signal and generates an optical signal representing the input signal. A second switch is between a supply voltage node the bias current node. The second switch, responsive to second control signal, selectively establishes a short between the supply voltage node the bias current node.
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公开(公告)号：US20190045283A1
公开(公告)日：2019-02-07
申请号：US16155566
申请日：2018-10-09
摘要： An optical signal module including a driver and an optical signal module. The driver includes a differential pair configured to receive and process an input signal to create a drive signal. A modulation current source provides a modulation current to the differential pair. One or more termination resistors connected to the differential pair for impedance matching. A first switch, responsive to a first control signal, maintains charge on a charge storage device. The optical signal module includes an optical signal generator arranged between a supply voltage node and a bias current node. The optical signal generator receives the drive signal and generates an optical signal representing the input signal. A second switch is between a supply voltage node the bias current node. The second switch, responsive to second control signal, selectively establishes a short between the supply voltage node the bias current node.
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公开(公告)号：US20180062747A1
公开(公告)日：2018-03-01
申请号：US15688677
申请日：2017-08-28
发明人： Atul Gupta , Marek Tlalka
CPC分类号： H04B10/40 , G02B6/4246 , G02B6/4274 , G02B6/4292 , G02B6/4293 , H04B10/2503 , H04B10/58 , H04B10/6971 , H04L25/03057 , H04L25/03885
摘要： An optic module for use with a host is disclosed that includes a port configured to accept an optical connector connected to fiber optic cables which carry optic signals. A receiver module is configured to receive an incoming optic signal and convert the received optic signal to a received electrical signal while a transimpedance amplifier amplifies the received electrical signal. An electrical interface is configured to electrically interface the optic module with the host thereby providing the amplified received electrical signal to a digital signal processor in the host. On the transmit side, an optic device driver receives an outgoing electrical signal from the host, after processing by a digital signal processor in the host, for amplification while a transmit module is configured to convert the outgoing electrical signal to an outgoing optic signal and transmit the outgoing optic signal on an optic fiber.
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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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