This paper presents a quadrature injection locked frequency divider (ILFD) employing tunable active inductors (TAIs), which are used is to extend the locking range and to reduce die area. The CMOS ILFD is based on a new quadrature voltage-controlled oscillator (VCO) with cross-coupled switching pairs and TAI-C tanks, and was fabricated in the 0.18-μm 1P6M CMOS technology. The divide-by-2 LC-tan...

The absorption and fluorescence properties in a class of oligothiophene push-pull biomarkers are investigated with a long-range-corrected (LC) density functional method. Using linear-response time-dependent density functional theory (TDDFT), we calculate excitation energies, fluorescence energies, oscillator strengths, and excited-state dipole moments. To benchmark and assess the quality of the...

A novel model based methodology is presented to determine optimal device parameters for the fully integrated ultra low voltage DC-DC converter for energy harvesting applications. The proposed model feasibly contributes to determine the maximum efficient number of charge pump stages to fulfill the voltage requirement of the energy harvester application. The proposed DC-DC converter based power c...

A low phase noise CMOS complementary cross-coupled LC-tank voltage-controlled oscillator (VCO), implemented with TSMC 0.18μm 1P6M CMOS technology, is presented. Double pair pseudoresistance transistors biased by the tapped center of the inductor are utilized to reduce the DC bias current. The circuit consumes 1.55 mA from a 1.5 V supply voltage which saves up to 52.4% power, compared with the c...

Abstract: We investigate the dynamics of a current-biased Josephson junction quantum bit or “qubit” coupled to an LC resonator. The Hamiltonian of this superconductor-based system is developed and the energies and eigen-functions of the entangled states are studied by Harmonic approximation. Since such a superconducting junction behaves as a two-level artificial atom coupled to a harmonic oscil...

An ultra-low-power K-band LC-VCO (voltage-controlled oscillator) with a wide tuning range is proposed in this paper. Based on the current-reuse topology, dynamic back-gate-biasing technique utilized to reduce power consumption and increase range. With technique, small dimension cross-coupled pairs are allowed, reducing parasitic capacitors consumption. Implemented SMIC 55 nm 1P7M CMOS process, ...

An analysis is presented in this contribution to describe the steady-state amplitude of a CMOS LC Colpitts oscillator, as well as its response to small interferences. The problem of signal dependency of noise sources is also addressed. The general conclusions of the analysis are applicable to most LC oscillators. The procedure to perform a general analysis for an arbitrary LC oscillator is outl...

A 60 GHz cross-coupled differential voltage controlled oscillator is designed in 130 nm CMOS technology. The tuning range is from 57GHz to 66GHz, with an estimated phase noise of -93 dBc/Hz at 1 MHz offset. The oscillator employs fundamental 30 GHz VCO followed by doublers and buffers. Key-Words: CMOS, 60GHz, VCO, wide tuning range, phase noise

We present a complete theory for laser cooling of macroscopic radio-frequency LC electrical circuit by means an optoelectromechanical system, consisting optical cavity dispersively coupled to nanomechanical oscillator, which is in turn capacitively the interest. determine optimal parameter regime where resonator can be cooled down its quantum ground state, requires large optomechanical cooperat...