65.6 – 75.2 GHz Phase-Controlled Push-Push Frequency Quadrupler with 8.3% DC-to-RF Efficiency in 40-nm CMOS

We present a 40-nm CMOS 70-GHz frequency quadrupler based on a phase-controlled push–push (PCPP) topology that provides high efficiency and harmonic suppression. Since MOSFETs in the PCPP stack turn off alternately, the quadrupler can provide high energy efficiency even for fourth-order frequency multiplication. One major problem related to even-order harmonic suppression was mitigated by using a ...