Patent ID: 7397317
Filing Date: 2008-07-08
Classification: H03B,H03H

Abstract:
1. A quadrature signal generator which generates first, second, third, and fourth quadrature signals using first and second differential signals, the quadrature signal generator comprising: a first phase tuning unit comprising a first input terminal which receives the first differential signal and a second input terminal, the first phase tuning unit changing a phase of the first differential signal to thereby generate the first quadrature signal; a second phase tuning unit comprising a first input terminal which receives the second differential signal and a second input terminal, the second phase tuning unit changing a phase of the second differential signal to thereby generate the second quadrature signal; a third phase tuning unit comprising a first input terminal which receives the second differential signal and a second input terminal, the third phase tuning unit changing the phase of the second differential signal to thereby generate the third quadrature signal; and a fourth phase tuning unit comprising a first input terminal which receives the first differential signal and a second input terminal, the fourth phase tuning unit changing the phase of the first differential signal to thereby generate the fourth quadrature signal, wherein the second input terminal of the first phase tuning unit, the second input terminal of the second phase tuning unit, the second input terminal of the third phase tuning unit, and the second input terminal of the fourth phase tuning unit are grounded.