Sughrue Mion, PLLC
Quadrature voltage controlled oscillator
A quadrature voltage controlled oscillator having low phase noise and excellent output swing characteristics includes a first voltage controlled oscillator for outputting a positive in-phase output signal and a negative in-phase output signal; a second voltage controlled oscillator for outputting a positive quadrature-phase output signal and a negative quadrature-phase output signal, the second voltage controlled oscillator having a symmetrical structure with the first voltage controlled oscillator and constituting a feedback loop together with the first voltage controlled oscillator; a first constant current source for supplying constant current to the first voltage controlled oscillator in response to the output signals; and a second constant current source for supplying constant current to the second voltage controlled oscillator in response to the output signals.
Samsung Electronics Co., Ltd.
H H H H H
H03B H03B H03B H03B H03B
inventional inventional inventional additional inventional
Heung-bae Seong-soo Jin-soo Chang-sik Chan-young
Lee Lee Park Yoo Jeong