Patent ID: 8194794
Filing Date: 2012-06-05
Classification: H04B,H04L

Abstract:
1. A quadrature signal phase controller comprising: a first phase shifter mixing each of in-phase differential input signals and each of quadrature-phase differential input signals, in response to at least any one of a first control signal and a second control signal, to generate phase shifted first in-phase differential output signals and phase shifted first quadrature-phase differential output signals; and a second phase shifter, mixing each of the in-phase differential input signals and each of the quadrature-phase differential input signals, in response to at least any one of the first control signal and the second control signal, to generate phase shifted second in-phase differential output signals and phase shifted second quadrature-phase differential output signals, wherein each of the first and second phase shifters, in response to a change in a level of the first control signal and a change in a level of the second control signal, increases or decreases the phase difference between the first in-phase differential output signals and the second quadrature-phase differential output signals, and the phase difference between the second in-phase differential output signals and the first quadrature-phase differential output signals.