Low Voltage/Low Power CMOS VCO
نویسندگان
چکیده
In this paper we introduce a CMOS low voltage/low power (LV/LP) voltage controlled oscillator (VCO). It includes a simple V-I converter, a current controlled ring oscillator based on new differential delay cells, and a source-coupled differential pair to convert differential signal to single-ended signal. The V-I converter is implemented as a source follower type, exhibiting excellent linearity of transconductance with low power consumption. The new delay cell employs local positive feedback to increase its DC gain, achieving stable oscillation at low supply voltage. The simulation and measurement results are given to show the linearity between the input (control voltage) and the output (frequency) in the frequency range of 100MHz to 400MHz with 1.2V power supply. The VCO only consumes power of 2.25mW at operating frequency of 400MHz and 1.2V supply. key words: microprocessor, PLL, V-I converter, current and voltage controlled oscillator (CCO and VCO)
منابع مشابه
Design and Analysis of a 0.4V 1.08mW 12GHz High-Performance VCO in 0.18μm CMOS (Invited Paper)
This paper presents the design and analysis of a high-performance fully-integrated 0.18μm CMOS voltage-controlled oscillator (VCO) with low supply voltage and low dc power consumption. To enhance the transconductance (gm) of MOSFETs and negative conductance (-Gm) of a cross-coupled pair, the device size of the nMOS cross-coupled pair is enlarged. For reducing the supply voltage and minimizing t...
متن کاملDesign and Simulation of an X Band LC VCO
In this paper, a systematic method for the circuit parameters design of a monolithic LC Voltage Controlled Oscillator (VCO) is reported. The method is based on the negative resistance generation technique. As a result, a VCO has been designed in 0.18um CMOS technology using a conventional VCO structure to obtain the optimum values for the phase noise and power consumption. The simulation result...
متن کاملA Low Power Consumption Single Stage Source Coupled CMOS Voltage Controlled Oscillator (VCO) Using 0.18 μm CMOS Technolog
This paper present a single stage CMOS Voltage controlled oscillator with a high oscillation frequency and low power consumption. The VCO is a single stage circuit has a low phase noise due to reduced noise sources. The VCO is intended to operate as a frequency synthesizer in a PLL to generate local oscillator frequency (LO) for an acquisition system, providing in-phase/Q-phase outputs. The per...
متن کاملA Low Power and Linear Voltage Controlled Oscillator Using Hybrid CMOS-CNFET Technology
This paper presents a hybrid CMOS-CNFET voltage controlled oscillator (VCO) with low power dissipation and linear response over a wide control voltage range. The hybrid circuit is based on PTM 32nm low power CMOS devices and 32nm CNFET devices with different threshold voltages. The VCO frequency and power dissipation are investigated for CNFET parameters such as number of nano-tubes, gate oxide...
متن کاملA Low Phase Noise, Power Efficient Voltage Controlled Oscillator Using 0.18-μm Cmos Technology
A low phase noise, power efficient VCO using UMC 0.18μm CMOS technology has been proposed in this paper. The proposed VCO has a tuning range of 9.71GHz to 9.9GHz, with a phase noise of -79.88 dBc/Hz @ 600kHz offset. The Vtune ranging between 1V 1.5V generates sustained oscillations. The maximum power consumption of the VCO is 11.9mW using a supply voltage of 1.8V with ±10% variation. Keywords-P...
متن کامل