Mediatek Corporation

Mstar Semiconductor, Inc.

Yueh-Ting Lee

Yao-Chi Wang

Chih-Ming Hung

Shih-Chieh Yen

Sheng-Che Tseng

Cheng-Chieh Lin

A circuit for generating a plurality of oscillating signals with different phases includes a frequency divider, a first delay chain, a second delay chain and a calibration circuit. The frequency divider is arranged for frequency dividing a first input signal and a second input signal to generate a first frequency-divided input signal and a second frequency-divided input signal. The first delay chain is arranged for delaying the first frequency-divided input signal, and the second delay chain is arranged for delaying the second frequency-divided input signal. The calibration circuit is arranged for controlling delay amounts of the first delay chain and the second delay chain according to signals within the first delay chain or the second delay chain; wherein output signals of a portion delay cells within the first delay chain and the second delay chain serve as the plurality of oscillating signals with different phases.

Method for generating a plurality of oscillating signals with different phases and associated circuit and local oscillator

A communication device is provided in the present invention. The communication device comprises an oscillation signal source, a tunable capacitor array, a frame counter; and a control module. The control module is configured to jointly or separately control the tunable capacitor array and the frame counter to compensate a first frequency offset of the oscillation signal source when the communication device operates in a first mode, and to jointly or separately control the tunable capacitor array and the frame counter to compensate a second frequency offset of the oscillation signal source when the communication device operates in a second mode.

Communication device and control method thereof

Growing community of inventors

Taipei, Taiwan

Yueh-Ting Lee