This paper presents a Low power consumption & Low phase Noise Voltage Controlled Ring Oscillator (VCRO) operated at 2.45 GHz. Frequency implemented in 0.18 μm complementary metal-oxide semiconductor (CMOS) technology with the unique differential delay cell. The Voltage Controlled Ring Oscillator is design in Tanner Tool Version 13 environment. Power Consumption should be reduced to improve the ...

Today quadrature signals for IQ demodulation are provided through RC polyphase networks, quadrature oscillators or double frequency VCOs. This paper presents a new method for generating quadrature signals in integrated circuits using only inductors and capacitors. This LC quadrature generation method enables significantly reduced noise and power consumption.

* This work was supported, in part, by Texas Instruments Inc., Rocketchips Inc., and the R. J. Carver trust. Abstract-Techniques for enhancing the operation frequency range for voltage controlled ring oscillators are discussed. It is shown that substantial improvement in speed is achievable with concentric layout techniques and with transconductance density optimization. Simulation results for ...

A voltage-controlled oscillator (VCO) tolerant to process variations at lower supply voltage was proposed. The circuit consists of an on-chip threshold-voltage-monitoring circuit, a current-source circuit, a bodybiasing control circuit, and the delay cells of the VCO. Because variations in low-voltage VCO frequency are mainly determined by that of the current in delay cells, a current-compensat...