公开(公告)号：US12052030B2

公开(公告)日：2024-07-30

申请号：US17809035

申请日：2022-06-27

Applicant: GlobalFoundries U.S. Inc.

Inventor： Asif Iqbal ,  Sanmitra Bharat Naik

IPC: H03M1/12 ,  H03K5/24 ,  H03M1/66

CPC classification number: H03M1/662 ,  H03K5/24

Abstract: Embodiments of the disclosure provide a circuit structure and method to indicate a differential voltage polarity using a comparator. The circuit structure includes a digital-to-analog converter (DAC) coupled to a positive differential voltage, a negative differential voltage, and a reference voltage. The DAC generates an output based on the positive differential voltage, the negative differential voltage, and the reference voltage. A comparator has a first input coupled to one of the DAC output and the positive differential voltage, and a second input coupled to one of the reference voltage and the negative differential voltage. A multiplexer array is coupled to the comparator and transmits one of: the positive differential voltage and the negative differential voltage to the comparator, causing the comparator to output a differential voltage polarity; and the DAC output and the reference voltage, causing the comparator to output an approximated bit for the DAC output.

公开(公告)号：US20230421168A1

公开(公告)日：2023-12-28

申请号：US17809035

申请日：2022-06-27

Applicant: GlobalFoundries U.S. Inc.

Inventor： Asif Iqbal ,  Sanmitra Bharat Naik

IPC: H03M1/66 ,  H03K5/24

CPC classification number: H03M1/662 ,  H03K5/24

Abstract: Embodiments of the disclosure provide a circuit structure and method to indicate a differential voltage polarity using a comparator. The circuit structure includes a digital-to-analog converter (DAC) coupled to a positive differential voltage, a negative differential voltage, and a reference voltage. The DAC generates an output based on the positive differential voltage, the negative differential voltage, and the reference voltage. A comparator has a first input coupled to one of the DAC output and the positive differential voltage, and a second input coupled to one of the reference voltage and the negative differential voltage. A multiplexer array is coupled to the comparator and transmits one of: the positive differential voltage and the negative differential voltage to the comparator, causing the comparator to output a differential voltage polarity; and the DAC output and the reference voltage, causing the comparator to output an approximated bit for the DAC output.

公开(公告)号：US20240275282A1

公开(公告)日：2024-08-15

申请号：US18166576

申请日：2023-02-09

Applicant: GlobalFoundries U.S. Inc.

Inventor： Dzung T. TRAN ,  Shivraj G. Dharne ,  Asif Iqbal

IPC: H02M3/158 ,  H02M1/00 ,  H02M1/096 ,  H02M1/36

CPC classification number: H02M3/158 ,  H02M1/0009 ,  H02M1/096 ,  H02M1/36

Abstract: A reference circuit for an electronic device having a plurality of power supply voltages comprises a supply start-up circuit, a power-down start-up circuit, and a reference generating circuit. The supply start-up circuit comprising a resistive-capacitive (RC) circuit coupled between a first power supply voltage and a ground. The RC circuit includes a pulse node coupled between a first capacitor and a resistive element, and generates a power-up pulse signal at the pulse node. The power-down start-up circuit is powered by a second power supply voltage and comprises a pulse generation circuit that generates a first start-up signal. The reference generating circuit outputs a reference signal. The reference generating circuit exists a low-power mode when either of the power-up pulse signal and the first start-up signal is generated.