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This paper investigates the influence of electrostatic discharge (ESD) in operation on an integrated Pierce crystal oscillator for clock signal generation. We show that ESD, which has been capacitively coupled into the circuit, can cause temporary suspension of the clock signal. We analyze the coupling path and in addition we present a new, more robust crystal oscillator design for integrated circuits...
This paper presents an eight-phase low-phase-noise VCO using series coupling technique, which obtains less phase error compared to the parallel coupling. Furthermore, the bottom-series coupling is used to achieve better phase noise than the top-series coupling. To properly design the complementary cross-coupling pair, the impedance locus theory is adopted. The chip is implemented in 180 nm CMOS technonlogy...
This paper presents the design and implementation of an integrated wideband Marchand balun in standard 65nm CMOS technology. The proposed balun operates from 16 GHz to 21 GHz achieving high coupling together with significantly low phase and amplitude imbalance between the balun outputs. A new balun structure is proposed to solve the nonideal ground problem in CMOS-based microwave circuits, and coherently...
In this paper, a dual-band wide-tuning-range quadrature VCO (QVCO) using a harmonic-injection coupling technique is proposed. The tuning range of a switched-capacitor and a switched-inductor LC-tank are investigated. Based on the investigation, a switched-inductor tank is employed since it provides a wide tuning range. A harmonic-injection coupling technique, which eliminates the noise sources of...
Future multistandard multiband mobile communication terminals demand highly efficient multiband power amplifiers (PAs). In this contribution, for the first time, the design of a compact planar multiharmonic load transformation network (MHLTN) to realise triband highly efficient power amplifiers (PAs) is reported. The proposed switchless MHLTN comprising only transmission-lines is capable to obtain...
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