This paper demonstrates the feasibility of implementing wide tuning band low phase noise oscillators in low cost Sibased integration technologies. For that, it is necessary to use radio-frequency switched capacitors arrays (RFSCA) and differentially tuned anti-parallel varactors. To corroborate this idea, a voltage controlled oscillator (VCO), designed in a low cost 0.35 μm CMOS technology, is ...

We propose and experimentally demonstrate a new chaos based opto-electronic secure communication system using voltage control oscillator. The chaotic signal has been generated using a modified electronic circuit of the logistic map. The output of the chaos generator is translated to a chaotically varying instantaneous frequency of the voltage controlled oscillator (VCO). The proposed technique ...

CMOS Scaling technologies are the main caused for great impact on Analog design. The most severe affect is the reduction in the voltage supply. A double balanced down conversion oscillator mixer using 90 nm CMOS technology is proposed in this work. This oscillator mixer consists of an individual mixer stacked on a voltage-controlled oscillator (VCO). The proposed stacked structure allows entire...

Oscillator Architectures and Enhanced Frequency Synthesizer. (December 2009) Sang Wook Park, B.S., Yonsei University, Korea; M.S., Yonsei University, Korea Chair of Advisory Committee: Dr. Edgar Sánchez-Sinencio A voltage controlled oscillator (VCO) that generates a periodic signal whose frequency is tuned by a voltage is a key building block in any integrated circuit system. A sine wave oscill...

A reconfigurable current mode programmable multiphase sinusoidal oscillator is realized using digitally controlled low voltage CMOS current conveyors. The realized current mode programmable multiphase sinusoidal oscillator can provide independent digital control to its oscillating frequency through n-bit control words with high resolution capability, as well as reconfigurability. The realized m...

A differential-voltage-controlled LC oscillator employs a gm-tuned technique instead of a varactor is presented, verified, and measured. The design was demonstrated in a standard 0.18m CMOS process. The oscillator can operate at the range of 4.73–5.05 GHz under a 1.8-V supply voltage. The measured phase noise is 100.76 dBc/Hz at 100-kHz frequency offset and 121.53 dBc/Hz at 1-MHz frequency offs...

This work presents voltage controlled oscillator (VCO) design intended for integrated transceiver of Bluetooth standard communication system, in which full compensation of process parameters variations can be obtained. This is realized by fitting on chip capacitance of LC resonator in. This capacitance consists of two independent parts first is used for coarse tuning of resonant frequency and t...

This paper describes a fully integrated Silicon Germanium (SiGe) Voltage Controlled Oscillator (VCO) chip with 19% tuning range and low phase noise suitable for 10-Gb/s fiber optic transceivers and X-band applications. It consists of two switchable externally enabled VCO’s. The total chip tuning range is 9.2-11.1GHz when the varactor control voltage varies from 0 to 3.0V and the measured phase ...

This paper presents the design of a voltage controlled oscillator (VCO) with small VCO gain (Kvco) variation. To compensate large Kvco variation, a series varactor bank has been added to the conventional LC-tank with parallel capacitor bank array. Implemented in a 0.13m CMOS RF technology, the proposed VCO can be tuned from 4.6GH to 5.5GHz with the Kvco variation of less than 9.6%. While consu...

Edward Liu and Alberto L. Sangiovanni-Vincentelli Department of Electrical Engineering & Computer Sciences University of California Berkeley, California 94720 Abstract This paper presents behavioral representations for detectors and voltage-controlled oscillators that are independent of circuit architectures. Parameter extraction techniques are described. Finally, parameter extraction for a VCO...