Title: Quadrature phase oscillator using complex coefficient filter
Application Number: 200610085015 Application Date: 2006.05.30
Publication Number: 1881784 Publication Date: 2006.12.20
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03B27/00,H04L27/00
Applicant(s) Name: Samsung Electronics Co., Ltd. Address:
Inventor(s) Name: Jun Si-bum, Park Sang-keun
Attorney & Agent: han mengxing tan changchi
Abstract:
     A quadrature phase oscillator in a Radio Frequency (RF) transceiver Integrated Circuit (IC) is provided. The quadrature phase oscillator includes a voltage controlled oscillator and a filter. The voltage controlled oscillator provides an oscillating frequency for modulation of a transmission/reception signal according to an applied voltage. The filter receives the oscillating frequency from the voltage controlled oscillator as an input, passes one of a negative frequency component of the input oscillating frequency and a positive frequency component of the input oscillating frequency, attenuates the other frequency component, generates an I (In phase) signal that is in phase with the input oscillating frequency and a Q (Quadrature phase) signal having a phase difference of 90 DEG with the input oscillating frequency for the passed frequency component, and outputs the I signal and the Q signal.
Time: 15
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