Results 171 to 180 of about 47,623 (225)
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2011
In this chapter a detailed analysis on the operation and architecture of the voltage-controlled oscillator (VCO)-based ADC is presented. The VCO-based quantizer is analyzed for two different architectures, one using a frequency-to-digital converter (FDC) the other a time-to-digital converter (TDC).
Samantha Yoder +2 more
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In this chapter a detailed analysis on the operation and architecture of the voltage-controlled oscillator (VCO)-based ADC is presented. The VCO-based quantizer is analyzed for two different architectures, one using a frequency-to-digital converter (FDC) the other a time-to-digital converter (TDC).
Samantha Yoder +2 more
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A fully‐integrated CMOS quadrature VCO implemented with balanced VCOs
Microwave and Optical Technology Letters, 2013AbstractA new CMOS quadrature voltage‐controlled oscillator (QVCO) is proposed. The LC‐tank QVCO consists of two balanced complementary Colpitts VCOs with differential outputs. The tail inductor output of the first balanced VCO is injected to the gate of the tail transistor in the second balanced VCO and vice versa to ensure the two balanced VCOs ...
Sheng‐Lyang Jang +3 more
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2017
With CMOS technology scaling, the analog and mixed-signal circuits face more and more design challenges and suffer a lot in accuracy. At the same time, digital circuits benefit from technology scaling in terms of improved timing accuracy and reduced power consumption.
Xinpeng Xing, Peng Zhu, Georges Gielen
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With CMOS technology scaling, the analog and mixed-signal circuits face more and more design challenges and suffer a lot in accuracy. At the same time, digital circuits benefit from technology scaling in terms of improved timing accuracy and reduced power consumption.
Xinpeng Xing, Peng Zhu, Georges Gielen
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MTT-S International Microwave Symposium Digest, 2005
Using synchronously controlled varactor tunable oscillators into both the RF and LO ports of a mixer produces a resulting VCO output which is extremely linear and wideband. A deviation from best straight line of +-25MHz has been achieved over a frequency range of 2-8GHz, tunable in only 4.77V.
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Using synchronously controlled varactor tunable oscillators into both the RF and LO ports of a mixer produces a resulting VCO output which is extremely linear and wideband. A deviation from best straight line of +-25MHz has been achieved over a frequency range of 2-8GHz, tunable in only 4.77V.
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VCO Verilog AMS Model for Fast Simulation in VCO-Based ADC
2018 28th International Symposium on Power and Timing Modeling, Optimization and Simulation (PATMOS), 2018This work presents an event-driven all-digital VCO model to be used into a VCO-based ADC for reduced computational time behavioral simulations. The proposed model is explained and compared with standard models in terms of both simulation speed and accuracy. It takes into account important analog behaviors such as non-linearity and phase noise.
David Buffeteau +2 more
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IEEE 1988 Microwave and Millimeter-Wave Monolithic Circuits Symposium. Digest of Papers., 2003
Two distinct monolithic GaAs voltage-controlled oscillators (VCOs) are reported: a Gunn diode-based circuit and a FET-based circuit. The Gunn VCO design incorporates 14 Gunn diodes, a varactor diode, power combiner, matching network and bias on a single integrated chip.
R. Goldwasser +8 more
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Two distinct monolithic GaAs voltage-controlled oscillators (VCOs) are reported: a Gunn diode-based circuit and a FET-based circuit. The Gunn VCO design incorporates 14 Gunn diodes, a varactor diode, power combiner, matching network and bias on a single integrated chip.
R. Goldwasser +8 more
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VCO phase noise characterization
Proceedings of 40th Midwest Symposium on Circuits and Systems. Dedicated to the Memory of Professor Mac Van Valkenburg, 2002A measurement procedure is developed specifically to characterize the phase noise of low Q, relatively unstable free-running oscillators. The phase noise performance of a VCO is evaluated theoretically using nonlinear computer aided design (CAD) tool and experimentally using phase noise measurement system.
D.Q. Xu, G.R. Branner
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The 2002 45th Midwest Symposium on Circuits and Systems, 2002. MWSCAS-2002., 2003
A novel CMOS VCO is investigated with a design of ring oscillator, where the frequency of the oscillator can be adjusted by the voltage of the substrate. A ring oscillator with five inverters is simulated with Cadence; with 1.6 /spl mu/m technology the range of the oscillation frequency is 271-289 MHz.
S. Venkataraman, null Yumin Zhang
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A novel CMOS VCO is investigated with a design of ring oscillator, where the frequency of the oscillator can be adjusted by the voltage of the substrate. A ring oscillator with five inverters is simulated with Cadence; with 1.6 /spl mu/m technology the range of the oscillation frequency is 271-289 MHz.
S. Venkataraman, null Yumin Zhang
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1998
After the discussion of bonding wire inductors in the previous chapter, we will now investigate the more “normal” type of integrated inductor, i.e. the spiral or planar inductor. This is indeed the dream of every RF VCO designer : be able to use a simple spiral metal track laid out in the standard metal routing levels of the IC as an inductor.
J. Craninckx, M. Steyaert
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After the discussion of bonding wire inductors in the previous chapter, we will now investigate the more “normal” type of integrated inductor, i.e. the spiral or planar inductor. This is indeed the dream of every RF VCO designer : be able to use a simple spiral metal track laid out in the standard metal routing levels of the IC as an inductor.
J. Craninckx, M. Steyaert
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15th European Microwave Conference, 1985, 1985
A wideband tuning method for dielectric resonator stabilized VCO (DR VCO) has been developed. By this new method, a wideband tunable DR VCO with the mechanically tuning bandwidth ratio more than 8% has been realized in any of the 3 to 13 GHz bands. The obtained typical characteristics of the developed DR VCO is as follows: mechanically tuning band from
Kenzo Wada, Eiji Nagata, Isao Haga
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A wideband tuning method for dielectric resonator stabilized VCO (DR VCO) has been developed. By this new method, a wideband tunable DR VCO with the mechanically tuning bandwidth ratio more than 8% has been realized in any of the 3 to 13 GHz bands. The obtained typical characteristics of the developed DR VCO is as follows: mechanically tuning band from
Kenzo Wada, Eiji Nagata, Isao Haga
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