公开(公告)号：US10826431B2

公开(公告)日：2020-11-03

申请号：US16427455

申请日：2019-05-31

申请人： NXP USA, INC.

发明人： Yi Yin ,  Baptiste Barroué ,  Birama Goumballa

IPC分类号： H03B5/12

摘要： The present application relates to a differential Colpitts voltage-controlled oscillator (VCO) circuit, which comprises a pair of transistors with control terminals biased by a common biasing voltage and a pair of couplers arranged to cross-couple corrector/drain of the transistors and the base/gate of the differential transistors. The pair of couplers have a coupling factor kc, which used to enhance the transconductance of the transistor pair, therefore can be used for power consumption reduction and phase noise minimalization.

公开(公告)号：US20190379326A1

公开(公告)日：2019-12-12

申请号：US16427455

申请日：2019-05-31

申请人： NXP USA, INC.

发明人： Yi Yin ,  Baptiste Barroué ,  Birama Goumballa

IPC分类号： H03B5/12

摘要： The present application relates to a differential oscillator circuit. The differential oscillator circuit comprises a pair of transistors with control terminals biased by a common biasing voltage. The differential oscillator circuit further comprises a transformer having a primary coil coupled between first current terminals of the transistors and a secondary coil coupled in a closed series circuit with two varactors, which are arranged for being tuned by a first common tuning voltage. The differential oscillator circuit further comprises a series circuit comprising two further varactors coupled in series to second current terminals of the transistors. The two further varactors are arranged for being tuned by a second common tuning voltage.