Patent ID: 8055218
Filing Date: 2011-11-08
Classification: H04B

Abstract:
1. A wireless transmitter circuit comprising: a frequency-generating circuit; a quadrature modulator; a first frequency-converting phase-locked loop circuit to which an output of said quadrature modulator is input; a first variable divider; and a second variable divider associated with said frequency-generating circuit, wherein an output of said frequency-generating circuit is supplied via said first variable divider to said quadrature modulator as a local oscillation signal for said quadrature modulator, wherein said output of said frequency-generating circuit is supplied directly or via a third variable divider to said first frequency-converting phase-locked loop circuit as a local oscillation signal for said first frequency-converting phase-locked loop circuit, and wherein a frequency division factor of said first variable divider is set to a variable number, wherein said first frequency-converting phase-locked loop circuit comprises wherein said frequency-generating circuit is formed by a phase-locked loop circuit comprising a second voltage controlled oscillator, the second variable divider, a second phase discriminator, a charge pump circuit, and a second loop filter circuit,