Techniques for configurable ADC front-end RC filter

    公开(公告)号:US10461770B2

    公开(公告)日:2019-10-29

    申请号:US16015585

    申请日:2018-06-22

    Abstract: Techniques for a configurable analog-to-digital converter filter to ameliorate transfer function peaking or frequency response issues are provided. In an example, a front-end circuit of a processing circuit can include a resistor-capacitor filter including at least two capacitors and a switch circuit. The resistor-capacitor filter can couple an input analog signal to the processing circuit. The switch circuit can couple to a first capacitor of the at least two capacitors, and can selectively place a terminal of the first capacitor at a selected one of a plurality of distinct nodes of the resistor-capacitor filter to configure the circuit to address the peaking or frequency response issue.

    Variable speed comparator
    33.
    发明授权

    公开(公告)号:US10454488B1

    公开(公告)日:2019-10-22

    申请号:US15994112

    申请日:2018-05-31

    Inventor: Sandeep Monangi

    Abstract: Various examples are directed to a variable speed comparator circuit comprising a first comparator, a second comparator, and a third comparator and a logic circuit. The first comparator may be configured to generate a first comparator output using a first input and a second input. The second comparator may be configured to generate a second comparator output using the first input and the second input. The third comparator may be configured to generate a third comparator output using the first input and the second input. A propagation delay of the second comparator may be less than a propagation delay of the first comparator. Also, a propagation delay of the third comparator may be less than the propagation delay of the second comparator. The second comparator may have an input offset relative to the third comparator. The logic circuit may be configured to determine that the second comparator output and the third comparator output are not equivalent and set a comparator circuit output to the first comparator output.

    BIASING OF RADIO FREQUENCY SWITCHES FOR FAST SWITCHING

    公开(公告)号:US20190296726A1

    公开(公告)日:2019-09-26

    申请号:US15926323

    申请日:2018-03-20

    Abstract: Apparatus and methods for biasing radio frequency (RF) switches to achieve fast switching are disclosed herein. In certain configurations, a switch bias circuit generates a switch control voltage for turning on or off a switch that handles RF signals. The switch bias circuit provides the switch control voltage to a control input of the switch by way of a resistor. Additionally, the switch bias circuit pulses the switch control voltage when turning on or off the switch to thereby shorten switching time. Thus, the switch can be turned on or off quickly, which allows the switch to be available for use soon after the state of the switch has been changed.

    Current sensor and a method of manufacturing a current sensor

    公开(公告)号:US10416195B2

    公开(公告)日:2019-09-17

    申请号:US15179249

    申请日:2016-06-10

    Abstract: The present disclosure provides an improved Rogowski-type current sensor. In order to allow the sensing coil and the compensation wire to overlap, the sensor is produced using two boards. The current sensing coil is provided on one board, and the compensation wire is provided on another board. The coil and the wire are arranged such that they at least partially overlap, and ideally the compensation wire is formed entirely within the area defined by the coil, albeit in a different plane. This arrangement makes the current sensor far better at rejecting interference than prior art PCB arrangements. In addition, the coil may be formed on a two-sided board. The board has upper radial elements formed on an upper surface, and lower radial elements formed on lower surface. The radial elements are connected using vias formed in the board. The upper radial elements are arranged in a first plane, and the lower radial elements are formed in a second parallel plane. The upper radial elements are arranged so that they are aligned with the lower radial elements, such that a pair of radial elements form a radial plane that is perpendicular to the board surface. This symmetry ensures excellent sensitivity to currents in a conductor.

    ANALOG TO DIGITAL CONVERTER STAGE
    39.
    发明申请

    公开(公告)号:US20190280705A1

    公开(公告)日:2019-09-12

    申请号:US15916009

    申请日:2018-03-08

    Abstract: A stage, suitable for use in an analog to digital converter or a digital to analog converter, can have a plurality of slices that can be operated together to form a composite output. The stage can have reduced thermal noise, while each slice on its own has sufficiently small capacitance to respond quickly to changes in digital codes applied to the slice. This feature allows a fast conversion to be achieved without loss of noise performance.

    METHOD OF LINEARIZING THE TRANSFER CHARACTERISTIC BY DYNAMIC ELEMENT MATCHING

    公开(公告)号:US20190280704A1

    公开(公告)日:2019-09-12

    申请号:US16053455

    申请日:2018-08-02

    Abstract: A stage, suitable for use in and analog to digital converter or a digital to analog converter, comprises a plurality of slices. The slices can be operated together to form a composite output having reduced thermal noise, while each slice on its own has sufficiently small capacitance to respond quickly to changes in digital codes applied to the slice. This allows a fast conversion to be achieved without loss of noise performance. The slices can be sub-divided to reduce scaling mismatch between the most significant bit and the least significant bit. A shuffling scheme is implemented that allows shuffling to occur between the sub-sections of the slices without needing to implement a massively complex shuffler.

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