Turocy & Watson, LLP
PLL circuit and radio communication apparatus
A PLL circuit includes: a voltage-controlled oscillator including: a first oscillating portion configured to generate first differential signals; and a second oscillating portion configured to generate second differential signals with a phase difference of 90 degrees from the first differential signals; a phase detector configured to compare phases of third differential signals based on the first and second differential signals with a phase of a reference signal; and a loop filter configured to generate a control voltage for controlling the voltage-controlled oscillator based on a result of the comparison in the phase detector.
Kabushiki Kaisha Toshiba
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inventional inventional inventional additional
Tetsuro Hiroaki Osamu Shoji
Itakura Hoshino Watanabe Otaka