A new circuit topology for quadrature signal generation is presented. In the proposed circuit two identical negative-resistance oscillators are coupled to each other via capacitors in such a way that quadrature signals are ...

A new low-phase noise low-power quadrature voltage-controlled oscillator (QVCO) using differential Colpitts oscillator is presented. The proposed QVCO is composed of two identical current-switching differential Colpitts ...

In this work, a new circuit configuration for second-harmonic quadrature voltage controlled oscillator (QVCO) with CMOS technology is proposed. The proposed QVCO is made by coupling two identical cross-connected VCOs. The ...

on the insights gained

from the mechanism of operation, a new low-noise, low-voltage

(Vdd as low as 0.6 V) quadrature oscillator utilizing the

superharmonic coupling is proposed and verified with

simulation. The same coupling scheme can...