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    GLITCH COMPENSATION IN ELECTRONIC CIRCUITS
    1.
    发明公开
    GLITCH COMPENSATION IN ELECTRONIC CIRCUITS 审中-公开

    公开(公告)号：EP3350927A1

    公开(公告)日：2018-07-25

    申请号：EP16767202.1

    申请日：2016-09-13

    Applicant: Firecomms Limited

    Inventor： DONOVAN, Colm ,  CAHILL, Ciaran ,  MURPHY, Patrick

    IPC: H03K19/003

    CPC classification number: H03K19/00346 ,  H03K19/00369

    Abstract: A supply circuit for providing pulses of current has a current source (11), a reference voltage source (12) for controlling magnitude of the current, and a current switch (13) for controlling whether or not the current passes through a load. Also, there is a switch control signal terminal (15) for controlling the current switch, and glitch compensation elements including at least one capacitance circuit (32) and associated capacitor drive circuit (21) for feeding a variable correcting voltage back to the reference voltage,), and a controller (33) to control said variable voltage.

    AN OPTICAL RECEIVER WITH A CASCODE FRONT END
    4.
    发明公开
    AN OPTICAL RECEIVER WITH A CASCODE FRONT END 审中-公开

    公开(公告)号：EP3350945A1

    公开(公告)日：2018-07-25

    申请号：EP16763848.5

    申请日：2016-09-13

    Applicant: Firecomms Limited

    Inventor： MURPHY, Patrick ,  DONOVAN, Colm ,  CAHILL, Ciaran

    IPC: H04B10/61 ,  H04B10/69

    Abstract: An optical receiver (1) comprises a differential TIA (4) linked with a photodiode (2, 3) providing a current sense signal (Isig_tia). The receiver is configured to provide to the TIA a sense signal as a sense TIA input (Isig_tia) and a second input (Idark_tia) which is a proportion of the maximum sense signal. The proportion input is half of said maximum sense signal. The inputs to the TIA are via cascode circuits (5, 6), thereby providing the advantages of a low input impedance for large area photodiodes at the TIA input, while creating a fully differential signal at the output, and the reduction of TIA bandwidth in burst mode applications, which filters out high frequency noise.

    A VOLTAGE COMPARATOR
    6.
    发明公开
    A VOLTAGE COMPARATOR 审中-公开

    公开(公告)号：EP3350923A1

    公开(公告)日：2018-07-25

    申请号：EP16763541.6

    申请日：2016-09-13

    Applicant: Firecomms Limited

    Inventor： DONOVAN, Colm ,  CAHILL, Ciaran ,  MURPHY, Patrick

    IPC: H03K5/24

    CPC classification number: H03K3/02337 ,  H03F3/16 ,  H03F2200/135 ,  H03K5/2481

    Abstract: A voltage comparator (1) has a high switching speed and simplicity of design. It minimizes pulse-width distortion of input digital signals when functioning as a digital input buffer in high speed communications applications. In addition it provides a simple hysteresis circuit (31) that is easily tuneable with a reference current. The hysteresis circuit (31) is dependent on a reference current. This current may be chosen to have a proportionality to temperature, supply, or another selectable parameter, and may be programmable, in order to create the desired hysteresis performance.

    A TRANSCONDUCTANCE CURRENT SOURCE
    9.
    发明公开
    A TRANSCONDUCTANCE CURRENT SOURCE 审中-公开

    公开(公告)号：EP3350920A1

    公开(公告)日：2018-07-25

    申请号：EP16763849.3

    申请日：2016-09-13

    Applicant: Firecomms Limited

    Inventor： MURPHY, Patrick ,  DONOVAN, Colm ,  CAHILL, Ciaran

    IPC: H03F3/345 ,  H03F3/08 ,  H03F3/50 ,  H03F1/22 ,  H03F1/32

    Abstract: A transconductance circuit has an input terminal (VIN) and an output terminal (Out), a first current source (4) having a gate connected to said input terminal (VIN); and a second current source (5), in parallel with said first current source, and having a higher transconductance and a wider dynamic range than the first current source. The current sources are configured so that at a low input voltage only the first current source (4) is on. A voltage drop circuit provides a lower bias voltage for the second current source than for the first current source.

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