公开(公告)号：US20170187414A1

公开(公告)日：2017-06-29

申请号：US15433928

申请日：2017-02-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： TIMOTHY J. TALTY ,  Cynthia D. Baringer ,  Mohiuddin Ahmed ,  James Chingwei Li ,  Yen-Cheng Kuan ,  Hsuanyu Pan ,  Emilio A. Sovero

IPC: H04B1/40 ,  H04B1/3822

CPC classification number: H04B1/0475 ,  H03F3/24 ,  H03M1/0673 ,  H03M1/365 ,  H03M1/662 ,  H03M3/408 ,  H03M3/424 ,  H04B1/0007 ,  H04B1/1036 ,  H04B1/3822 ,  H04B1/40 ,  H04B2001/0408 ,  H04B2001/0425 ,  H04B2001/1063 ,  H04L1/0071

Abstract: A cellular radio architecture that includes a receiver module having a delta-sigma modulator that includes a plurality of gm cells configured in stages, where each stage includes at least two gm cells and an LC filter circuit. The gm cells in each stage can be controlled to be active or inactive to convert, for example, the modulator from a fourth order modulator to a second order modulator to reduce power dissipation. Further, the gm cells can be controlled to optimize a dynamic range of the modulator and to redirect current from inactive cells to active cells in order to optimize power consumption.

公开(公告)号：US10797647B1

公开(公告)日：2020-10-06

申请号：US16531596

申请日：2019-08-05

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Mehran Mokhtari ,  Jongchan Kang ,  Ara Kurdoghlian ,  Daniel Kuzmenko ,  Emilio A. Sovero ,  Robert G. Nagele ,  Hasan Sharifi ,  Igal Bilik

IPC: H04B1/28 ,  H03D7/14 ,  H04B1/10

Abstract: A receiver apparatus is provided. The apparatus includes a single field effect transistor mixer comprising a gate, a source and a drain, wherein one of the source or the drain is configured to receive a first signal from a first low noise amplifier at a receiving frequency and another of the source or the drain is configured to output a second signal at an intermediate frequency to a second low noise amplifier; and a local oscillator configured to apply a third signal to the gate.

公开(公告)号：US09813089B2

公开(公告)日：2017-11-07

申请号：US15433964

申请日：2017-02-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Timothy J. Talty ,  Emilio A. Sovero ,  Mohiuddin Ahmed ,  Cynthia D. Baringer ,  James Chingwei Li ,  Yen-Cheng Kuan ,  Hsuanyu Pan

IPC: H04B1/04

CPC classification number: H04B1/0475 ,  H03F3/24 ,  H03M1/0673 ,  H03M1/365 ,  H03M1/662 ,  H03M3/408 ,  H03M3/424 ,  H04B1/0007 ,  H04B1/1036 ,  H04B1/3822 ,  H04B1/40 ,  H04B2001/0408 ,  H04B2001/0425 ,  H04B2001/1063 ,  H04L1/0071

Abstract: A cellular radio architecture that includes an RF transmitter having a digital signal processor, a digital-to-analog converter (DAC) module that converts digital bits from the processor to an analog signal, a tunable bandpass filter that removes frequencies in the analog signal outside of a frequency band of interest, and a power amplifier that amplifies the filtered analog signal. The architecture also includes a calibration feedback device that receives the amplified analog signal and provides a feedback signal to the processor for calibrating the digital signal to provide amplified amplifier pre-distortion. The processor employs a noise-shaping operation to shape the analog signal from the DAC to remove quantization noise in an immediate vicinity of the signal to improve signal-to-noise ratio, performs an infinite impulse response process to lower a noise floor in the analog signal, and provides pre-distortion of the digital signal to compensate for non-linearties of the power amplifier.

公开(公告)号：US09608661B2

公开(公告)日：2017-03-28

申请号：US15103256

申请日：2015-11-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Timothy J. Talty ,  Cynthia D. Baringer ,  Andrew J. MacDonald ,  Mohiuddin Ahmed ,  Albert E. Cosand ,  James Chingwei Li ,  Peter Petre ,  Zhiwei A. Xu ,  Yen-Cheng Kuan ,  Hsuanyu Pan ,  Emilio A. Sovero

IPC: H04B1/40 ,  H03M1/66 ,  H04B1/00 ,  H04B1/04 ,  H04B1/3822 ,  H04L1/00 ,  H03M1/06 ,  H03M1/36 ,  H03M3/00

CPC classification number: H04B1/0475 ,  H03F3/24 ,  H03M1/0673 ,  H03M1/365 ,  H03M1/662 ,  H03M3/408 ,  H03M3/424 ,  H04B1/0007 ,  H04B1/1036 ,  H04B1/3822 ,  H04B1/40 ,  H04B2001/0408 ,  H04B2001/0425 ,  H04B2001/1063 ,  H04L1/0071

Abstract: A cellular radio architecture that includes a programmable bandpass sampling radio frequency front-end and an optimized digital baseband. The architecture includes a multiplexer having signal paths that include a bandpass filter that passes a different frequency band than the other bandpass filters and a circulator that provides signal isolation between the transmit signals and the receive signals. The architecture also includes a receiver module having a separate signal channel for each of the signal paths in the multiplexer, where each signal channel in the receiver module includes a receiver delta-sigma modulator that converts analog receive signals to a representative digital signal. The architecture further includes a transmitter module having a transmitter delta-sigma modulator for converting digital data bits to analog transmit signals, where the transmitter module includes a power amplifier and a switch for directing the transmit signals to one of the signal paths in the multiplexer.