HIGH-FREQUENCY SIGNAL PROCESSING DEVICE AND WIRELESS COMMUNICATION SYSTEM
To reduce the influence of a spurious in a high-frequency signal processing device and a wireless communication system each provided with a digital type PLL circuit. In a digital type PLL circuit including a digital phase comparator unit, a digital low-pass filter, a digital control oscillator unit,...
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Main Authors | , , |
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Format | Patent |
Language | English |
Published |
19.03.2015
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Subjects | |
Online Access | Get full text |
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Summary: | To reduce the influence of a spurious in a high-frequency signal processing device and a wireless communication system each provided with a digital type PLL circuit. In a digital type PLL circuit including a digital phase comparator unit, a digital low-pass filter, a digital control oscillator unit, and a multi-module driver unit (frequency divider unit), the clock frequency of a clock signal in the digital phase comparator unit is configured selectably among a plurality of options. The clock frequency is selected among frequencies which are integer multiples of a reference frequency, in accordance with which frequency band of a standard is to be set for an oscillation output signal of the digital control oscillator unit. |
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Bibliography: | Application Number: US201414551518 |