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US 2013/0156089 A1Published application
Digital time-interleaved rf-pwm transmitter
AssigneeTexas Instruments Incorporated
InventorsRahmi Hezar, Lei Ding, Joonhoi Hur, Baher S. Haroun
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Abstract
A method for transmitting radio frequency (RF) signals is provided. In-phase (I) and quadrature (Q) signals are received and filtered using sigma-delta modulation. I and Q pulse width modulation signals are generated from the filtered I and Q signals and interleaved so as to generate a time-interleaved signal. The time-interleaved signal is then amplified to generate the RF signals.
Claims20
An apparatus comprising:
- a first sigma-delta modulator (SDM) that is configure to receive an in-phase (I) signal;
- a second SDM that is configured to receive a quadrature (Q) signal;
- a first pulse width modulator (PWM) that is coupled to the first SDM;
- a second PWM that is coupled to the second SDM;
- an interleaver that is coupled to the first and second PWMs that is configured to combine outputs from the first and second PWMs;
- and
- a power amplifier (PA) that is coupled to the interleaver.
4 more elements
A method comprising:
- receiving I and Q signals;
- filtering the I and Q signals using sigma-delta modulation;
- generating I and Q pulse width modulation signals from the filtered I and Q signals;
- interleaving the I and Q pulse width modulation signals so as to generate a time-interleaved signal;
- and
- amplifying the time-interleaved signal.
3 more elements
An apparatus comprising:
- a digital modulator that is configured to generate I and Q signals;
- a first SDM that is coupled to the digital modulator so as to receive the I signal;
- a second SDM that is coupled to the digital modulator so as to receive the Q signal;
- a first PWM that is coupled to the first SDM;
- a second PWM that is coupled to the second SDM;
- an interleaver that is coupled to the first and second PWMs that is configured to combine outputs from the first and second PWMs;
- and
- a switching PA that is coupled to the interleaver.
5 more elements
Dependencies are inferred from the claim text.