نتایج جستجو برای: voltage controlled oscillator
تعداد نتایج: 511928 فیلتر نتایج به سال:
An ultra-low voltage phase-locked loop (PLL) is demonstrated in standard 130-nm CMOS technology. The PLL employs a novel low-voltage charge-pump circuit which compensates current and leakage mismatches that result in suppressed reference spurs. Its voltage-controlled oscillator is realized with supply-regulated active-loop filter. Our PLL occupies 0.014 mm and consumes 88 μW at 0.4-V supply for...
The phase noise in an ultra low-power and low-voltage CMOS voltage controlled oscillator (VCO) has been measured and modelled for supply voltage VDD from 1.8 V down to 80 mV with various body bias voltages V B ~ The VCO is a fully integrated ring oscillator designed in a 0.18pm CMOS technology. In this design, the frequency can be controlled by VBp The effects of scaling VDD together with the e...
This paper presents a second order voltage mode quadrature sinusoidal oscillator using a recently reported active building block, namely the differential voltage current controlled conveyor transconductance amplifier. The circuit proposed here employs single differential voltage current controlled conveyor transconductance amplifier, two grounded resistors and two grounded capacitors. The use o...
A simple technique is presented to realize a digitally programmable voltage mode quadrature oscillator using second generation current conveyors. Firstly, the current conveyors based tunable quadrature oscillator is realised. A digital block is introduced in the realized tunable quadrature oscillator so that the oscillator can be controlled digitally. The realized Digitally Programmable Quadrat...
We demonstrate the design of a novel voltage-controlled oscillator (VCO), which is based on a metal-oxide-semiconductor field-effect transistor (MOS) differential amplifier with active load. This VCO achieves low phase noise and wide tuning range. The phase noise is –120 dBc/Hz at 600 KHz offset from a 1.216 GHz carrier frequency. This value is comparable to that of a LC-based integrated oscill...
This paper describes the design and optimization of voltage controlled oscillators with quadrature outputs. Systematic design of fully integrated LC-VCOs with a high inductance tank leads to a cross-coupled double core LC-VCO as the optimal solution in terms of power consumption. Futhermore, a novel fully differential frequency tuning concept is introduced to ease high integration. The concepts...
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