CIRCUIT AND METHOD FOR OPERATING AN ANALOG-TO-DIGITAL CONVERTER IN MULTIPLE MODES USING RING OSCILLATORS

    公开(公告)号:US20240364355A1

    公开(公告)日:2024-10-31

    申请号:US18308796

    申请日:2023-04-28

    IPC分类号: H03M1/12

    CPC分类号: H03M1/1245

    摘要: A device may include one or more ring oscillators and circuitry. The one or more ring oscillators may include a plurality of rings. The circuitry may be configured to receive a selection of a number of coupled rings and a number of phases. The circuitry may be configured to configure the one or more ring oscillators to operate at least based on the number of coupled rings. The circuitry may be configured to cause the configured one or more ring oscillators to receive an input signal and output a plurality of signals having respective phases corresponding to the number of phases. The circuitry may be configured to convert the plurality of signals to one or more digital signals.

    WIDE FREQUENCY RANGE HIGH SPEED CLOCK MULTIPLEXER

    公开(公告)号:US20240364334A1

    公开(公告)日:2024-10-31

    申请号:US18141344

    申请日:2023-04-28

    IPC分类号: H03K17/693

    CPC分类号: H03K17/693

    摘要: In some implementations, the device may include a first circuit receiving an input signal having a first frequency, the first circuit including a first node and a second node. The device may include a second circuit receiving an input signal having a second frequency different from the first frequency, the second circuit including a first node and a second node, a first inductor coupled between the first node of the first circuit and the first node of the second circuit. The device may include a second inductor coupled between the second node of the first circuit and the second node of the second circuit, a first switch coupled between the first node of the second circuit and the second node of the second circuit, at least one differential inductor formed of the first inductor and the second inductor in response to the first switch being in a closed state.

    Calibration detector with two offset compensation loops

    公开(公告)号:US12113542B2

    公开(公告)日:2024-10-08

    申请号:US17892001

    申请日:2022-08-19

    IPC分类号: H03M1/10

    CPC分类号: H03M1/1023

    摘要: Described herein are related to a calibration circuit for a digital to analog converter (DAC) including a plurality of DAC cells. The calibration circuit including a chopper circuit configured to receive a first signal from a first DAC cell of the plurality of DAC cells and receive a second signal from a second DAC cell of the plurality of DAC cells. The calibration circuit including a comparator circuit configured to receive the first signal and the second signal from the chopper circuit, provide a third signal indicating at least one of the first signal or the second signal. The calibration circuit also including a second circuit configured to offset a first voltage associated with the comparator circuit and configured to offset a second voltage associated with the chopper circuit.

    METHOD AND APPARATUS FOR NOISE REJECTION IN DRIVERS FOR DIODES

    公开(公告)号:US20240334567A1

    公开(公告)日:2024-10-03

    申请号:US18126927

    申请日:2023-03-27

    IPC分类号: H05B45/36 H05B45/345

    CPC分类号: H05B45/36 H05B45/345

    摘要: A device includes a first circuit, a ground, a reference voltage source that provides a reference voltage, and a first transistor that includes a first drain, a first source, and a first gate. The first circuit is coupled between the first source and the ground. The device has a second transistor that includes a second source and a second gate. The second transistor is biased as a source follower with the second source of the second transistor being set at the reference voltage. The first gate of the first transistor is coupled to the second gate of the second transistor, the first source has equal voltage as the second source, and the first circuit is coupled between the first source having the reference voltage and the ground to draw a constant current from the first source and to bias the first transistor in the saturation region to reduce parasitic capacitance.

    REFERENCE-RIPPLE COMPENSATION TECHNIQUE FOR SAR ADC

    公开(公告)号:US20240333300A1

    公开(公告)日:2024-10-03

    申请号:US18126924

    申请日:2023-03-27

    IPC分类号: H03M1/46 H03M1/06

    CPC分类号: H03M1/462 H03M1/0607

    摘要: An analog-to-digital converter (ADC) circuit includes a digital-to-analog converter (DAC) circuit, a comparator circuit, an encoder, and a compensation circuit. The DAC circuit receives a reference voltage and provides an output signal based on the reference voltage. The comparator circuit compares the output signal with an analog input signal and generates a comparison signal. A reset command is generated based on the output signal being greater than the analog input signal. The encoder splits a ripple associated with the reference voltage into multiple pulses in response to a reset command. The compensation circuit generates, responsive to the reset command, compensation pulses to compensate the multiple pulses.

    SPLIT-DITHERING SCHEME IN SUCCESSIVE APPROXIMATION ANALOG TO DIGITAL CONVERTER

    公开(公告)号:US20240333296A1

    公开(公告)日:2024-10-03

    申请号:US18127508

    申请日:2023-03-28

    IPC分类号: H03M1/20 H03M1/18 H03M1/46

    CPC分类号: H03M1/201 H03M1/185 H03M1/462

    摘要: A system includes a dither generator module that includes a most significant bits (MSB) dither generator device that generates a first random value. The dither generator module also includes a least significant bits (LSB) dither generator device that generates a second random value. The system further includes a first digital to analog converter (DAC) that receives a sum of the first random value and the second random value and generates a dither signal based on the sum of the first random value and the second random value. The system also includes an analog to digital converter (ADC) that receives a sum of the dither signal and a sampled input signal and generates a first digitized signal. The system includes a subtraction module that subtracts the sum of the first random value and the second random value from the first digitized signal to produce a digitized output signal.