Breakdown protection circuit for power amplifier

    公开(公告)号:US10797656B2

    公开(公告)日:2020-10-06

    申请号:US16055437

    申请日:2018-08-06

    Abstract: Systems, methods, and apparatuses for improving reliability and/or reducing or preventing breakdown of an amplifier, specifically breakdown of a transistor of an amplifier, are disclosed. A protection circuit can be electrically coupled to the amplifier, and can be configured to reduce a voltage swing at the amplifier. The amplifier can include a first transistor, and the protection circuit can include a second transistor electrically coupled to a control terminal of the first transistor of the amplifier. When a power at a control terminal of the second transistor of the protection circuit satisfies a threshold power, the protection circuit can be configured to reduce a power at a power terminal of the first transistor the amplifier. By reducing the voltage at the power terminal of the first transistor the amplifier, the protection circuit can allow the amplifier to operate safely, without breakdown.

    CONTINUOUS-TIME SAMPLER CIRCUITS
    5.
    发明申请

    公开(公告)号:US20200295977A1

    公开(公告)日:2020-09-17

    申请号:US16833177

    申请日:2020-03-27

    Abstract: A continuous-time sampler has series-connected delay lines with intermediate output taps between the delay lines. Signal from an output tap can be buffered by an optional voltage buffer for performance. A corresponding controlled switch is provided with each output tap to connect the output tap to an output of the continuous-time sampler. The delay lines store a continuous-time input signal waveform within the propagation delays. Controlling the switches corresponding to the output taps with pulses that match the propagation delays can yield a same input signal value at the output. The continuous-time sampler effectively “holds” or provides the input signal value at the output for further processing without requiring switched-capacitor circuits that sample the input signal value onto some capacitor. In some cases, the continuous-time sampler can be a recursively-connected delay line. The continuous-time sampler can be used as the front end sampler in a variety of analog-to-digital converters.

    Optical sensor package
    7.
    发明授权

    公开(公告)号:US10712197B2

    公开(公告)日:2020-07-14

    申请号:US15868899

    申请日:2018-01-11

    Abstract: An optical device package is disclosed. The optical device package includes a substrate that passes light at an optical wavelength. The optical device package also includes an optical device assembly that is mounted to the substrate. The optical device assembly comprises an optical device die. The optical device die has a first surface that is mounted to and facing the substrate and a second surface that is opposite the first surface. The optical device package further includes a molding compound that is disposed at least partially over the second surface of the integrated device die.

    Techniques for generating multiple low noise reference voltages

    公开(公告)号:US10673415B2

    公开(公告)日:2020-06-02

    申请号:US16048860

    申请日:2018-07-30

    Abstract: Techniques to generate two separate temperature independent reference voltages. The reference voltages can be generated using a chain of ΔVBE cells. A cross-quad ΔVBE-cell-based bandgap voltage reference can cancel out noise of associated current sources by forcing them to correlate. Several ΔVBE stages can be cascaded together to generate an appreciable PTAT component that can cancel the CTAT component from VBE. In some example configurations, only BJTs are used—without requiring use of an amplifier—to generate the bandgap voltages; in this way, extremely low noise voltage references can be generated. The PTAT and the CTAT voltages can be combined to generate a bandgap voltage of approximately VG0 or approximately 2VG0.

    Low quiescent current power on reset circuit

    公开(公告)号:US10651840B2

    公开(公告)日:2020-05-12

    申请号:US15954204

    申请日:2018-04-16

    Abstract: A device for providing a reset signal to one or more sequential logic circuits in an electronic system responsive to a supply voltage condition includes a first voltage detector circuit to generate a first pulse after the supply voltage rises to a first threshold voltage level. The device further includes a second voltage detector circuit to generate a second pulse after the supply voltage falls below a second threshold voltage level. The device additionally includes a latch circuit to store a first value based on the first pulse after the supply voltage rises to the first threshold voltage level, disable the first voltage detector circuit after storing the first value, reset to store a second value based on the second pulse after the supply voltage falls below the second threshold voltage level, and to disable the second voltage detector circuit after the resetting.

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