High oversampling ratio dynamic element matching scheme for high dynamic range digital to RF data conversion for radio communication systems
First Claim
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1. An RF transmitter module for a cellular radio, said transmitter module comprising:
- a delta-sigma modulator including a plurality of interleaving dynamic element matching (DEM) circuits providing interleaved digital bits at a reduced clock rate;
an interleaver controller for controlling the DEM circuits so as to provide groups of the digital bits at different points in time;
at least one digital-to-analog converter (DAC) for converting the interleaved digital bits to an analog signal;
a tunable bandpass filter for removing out-of-band signals from the analog signal; and
at least one power amplifier for amplifying the analog signal.
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Abstract
An RF transmitter module for a cellular radio that includes a delta-sigma modulator having a plurality of interleaving dynamic element matching (DEM) circuits providing interleaved digital bits at a reduced clock rate. An interleaver controller controls the DEM circuits so as to provide groups of the digital bits at different points in time. In one embodiment, a summation junction adds the groups of the digital bits to provide a continuous stream of the interleaved digital bits, a DAC converts the stream of interleaved digital bits to an analog signal, and a power amplifier amplifies the analog signal.
22 Citations
20 Claims
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1. An RF transmitter module for a cellular radio, said transmitter module comprising:
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a delta-sigma modulator including a plurality of interleaving dynamic element matching (DEM) circuits providing interleaved digital bits at a reduced clock rate; an interleaver controller for controlling the DEM circuits so as to provide groups of the digital bits at different points in time; at least one digital-to-analog converter (DAC) for converting the interleaved digital bits to an analog signal; a tunable bandpass filter for removing out-of-band signals from the analog signal; and at least one power amplifier for amplifying the analog signal. - View Dependent Claims (2, 3, 4, 5)
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6. An RF transmitter module for a cellular radio, said transmitter module comprising:
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a delta-sigma modulator including a plurality of interleaving dynamic element matching (DEM) circuits providing interleaved digital bits at a reduced clock rate; an interleaver controller for controlling the DEM circuits so as to provide groups of the digital bits at different points in time; a summation junction adding the groups of the digital bits to provide a continuous stream of the interleaved digital bits; a digital-to-analog converter (DAC) for converting the stream of interleaved digital bits to an analog signal; a tunable bandpass filter for removing out-of-band signals from the analog signal; and a power amplifier for amplifying the analog signal. - View Dependent Claims (7, 8, 9, 10)
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11. An RF transmitter module for a cellular radio, said transmitter module comprising:
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a delta-sigma modulator including a plurality of interleaving dynamic element matching (DEM) circuits providing interleaved digital bits at a reduced clock rate; an interleaver controller for controlling the DEM circuits so as to provide groups of the digital bits at different points in time; a plurality of digital-to-analog converters (DACs) each receiving the group of the digital bits from a separate one of the DEM circuits, each DAC converting the group of interleaved digital bits to an analog signal; a summation junction adding the analog signal from each of the DACs to provide a combined analog signal; a tunable bandpass filter for removing out-of-band signals from the combined analog signal; and a power amplifier for amplifying the combined analog signal. - View Dependent Claims (12, 13, 14, 15)
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16. An RF transmitter module for a cellular radio, said transmitter module comprising:
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a delta-sigma modulator including a plurality of interleaving dynamic element matching (DEM) circuits providing interleaved digital bits at a reduced clock rate; an interleaver controller for controlling the DEM circuits so as to provide groups of the digital bits at different points in time; a plurality of digital-to-analog converters (DACs) each receiving the group of the digital bits from a separate one of the DEM circuits, each DAC converting the group of interleaved digital bits to an analog signal; at least one tunable bandpass filter for removing out-of-band signals from the analog signal; a plurality of power amplifiers each receiving and amplifying the analog signal from a separate one of the DACs; and a summation junction adding the analog signals from each of the power amplifiers. - View Dependent Claims (17, 18, 19, 20)
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Specification
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Current AssigneeGM Global Technology Operations LLC (General Motors Company)
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Original AssigneeGM Global Technology Operations LLC (General Motors Company)
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InventorsTalty, Timothy J., Baringer, Cynthia D., Ahmed, Mohiuddin, Cosand, Albert E., Li, James Chingwei, Petre, Peter, Xu, Zhiwei A., Kuan, Yen-Cheng
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Primary Examiner(s)Nguyen, Duc M
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Application NumberUS15/103,298Publication NumberTime in Patent Office606 DaysField of Search341 77, 341143, 341126US Class CurrentCPC Class CodesH03F 3/24 of transmitter output stagesH03M 13/27 using interleaving techniquesH03M 3/338 by permutation in the time ...H03M 3/408 by the use of an LC circuitH03M 3/458 Analogue/digital converters...H03M 3/502 Details of the final digita...H04B 1/04 CircuitsH04B 1/3822 specially adapted for use i...H04B 2001/0408 with power amplifiersH04L 1/0071 Use of interleaving interle...H04L 25/02 Details ; arrangements for ...
