A Current-Reused Back-Gate Coupling QVCO Using Transformer Feedback Structure

作者：Jalalifar Majid; Byun Gyung Su^*

来源：IEEE Microwave and Wireless Components Letters, 2016, 26(7): 534-536.

DOI：10.1109/LMWC.2016.2575018

• Back-gate
• CMOS integrated circuit
• current-reused
• phase noise
• quadrature VCO

A current-reused back-gate coupling quadrature voltage-controlled oscillator (QVCO) using transformer feedback for K-band frequency applications is presented. The coupling scheme used to couple the two VCOs is a back-gate technique which removes the need for any extra coupling components that would degrade the phase noise performance and increase the power consumption. Utilizing current-reuse topology, which is inherently immune to the phase noise degradation, eliminates the second harmonic term at the common-source node of the conventional QVCOs. Moreover, the transformer feedback structure allows the QVCO to operate at low supply voltage. The tuning range of the proposed QVCO is 23.65-24.85 GHz, making the device applicable forK-band frequency wireless transceivers. The QVCO achieves a phase noise of -119.4 dBc/Hz at 1 MHz offset with a center frequency of 24 GHz as well as consumes 3.86 mW from a 0.8 V supply voltage. The QVCO is implemented in a standard 0.13 mu m CMOS process with core area of 0.29 mm(2).

• 出版日期2016-7