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AssigneeSilicon Laboratories Inc.
InventorsRangakrishnan Srinivasan, Mustafa H. Koroglu, Zhongda Wang, Francesco Barale, Abdulkerim L Coban, John M. Khoury, Sriharsha Vasadi, Michael S. Johnson, Vitor Pereira
Estimating the term…
A transmitter including a frequency synthesizer with a voltage-controlled oscillator that provides an oscillating signal, a programmable delay circuit that delays the oscillating signal to provide a delayed oscillating signal, a power amplifier that is configured to use the delayed oscillating signal for transmitting a signal, and a delay controller that programs the delay circuit with a delay time that reduces interference caused by coupling from the power amplifier to the voltage-controlled oscillator. The delay circuit may be programmed to reduce control voltage change of the voltage-controlled oscillator as a function of delay change, and/or to reduce phase noise degradation at an output of the transmitter as a function of delay change. The delay may be adjusted based on detected operating temperature. A calibration value may be determined at a calibration frequency, in which a frequency offset may be determined based on a selected channel frequency.
A transmitter, comprising:
A method of mitigating interference in a transmitter caused by magnetic coupling from a power amplifier to a voltage-controlled oscillator, the method comprising:
A transmitter, comprising:
Dependencies are inferred from the claim text.