A Dual Band, Wide Tuning Range CMOS Voltage Controlled Oscillator for Multi-Band Radio

Catli, Burak; Hella, Mona M.

doi:10.1109/rfic.2007.380954

Cited by 13 publications

(10 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previously implemented magnetically tuned VCOs [4], [6], [8] each used two multi-turn spiral inductors in a transformer configuration to achieve a high coupling coefficient. In this work however, multiple single-turn inductors are switched, which results in a higher and lower parasitic capacitance between the coils at the expense of a slight increase in area.…”

Section: Die Areamentioning

confidence: 99%

“…As seen in the approximation for (5), the second term in can be either positive or negative, indicating the dual resonance characteristics of a capacitively loaded transformer-based resonator. This dual resonance phenomenon has been exploited to produce a multi-band VCO without switches [4]. In order to avoid the unintentional occurrence of this upper-resonant mode in the lower band of a switched coupled-inductor VCO, the of the switch transistor needs to be small enough that across the TR when the switch is off.…”

Section: B Inductive Tuningmentioning

confidence: 99%

“…Note that the VCOs presented in [4], [6], [8] also employ magnetic coupling between the inductors. The VCO in [4] switches between the two modes of the capacitively loaded transformerbased resonator. As indicated in [4], the high-frequency mode has a significantly lower , which explains the high phase noise of the VCO in that mode.…”

Section: Vco Measurementsmentioning

confidence: 99%

“…The VCO in [4] switches between the two modes of the capacitively loaded transformerbased resonator. As indicated in [4], the high-frequency mode has a significantly lower , which explains the high phase noise of the VCO in that mode. In addition, the VCO in [6] is continuously tuned by varying the amplitude of the current in the secondary coil.…”

Section: Vco Measurementsmentioning

confidence: 99%

“…The use of magnetic tuning has been proposed to increase the TRs of conventional VCOs in some recent publications [4]- [9]. Magnetic tuning can be achieved by switching extra inductors that are coupled to the primary inductor as in [8], or by discretely or continuously controlling the current in the secondary winding of a transformer as in [4] and [6], respectively. Even though the magnetically tuned VCOs described in the literature provide greater TRs than conventional VCOs, they have significantly higher phase noise and/or power dissipation.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Design of Wide Tuning-Range CMOS VCOs Using Switched Coupled-Inductors

Demirkan

Bruss

Spencer

2008

IEEE J. Solid-State Circuits

118

View full text Add to dashboard Cite

Two designs of voltage-controlled oscillators (VCOs) with mutually coupled and switched inductors are presented in this paper to demonstrate that the tuning range of an LC VCO can be improved with only a small increase in phase noise and die area in a standard digital CMOS process. Particular attention is given to the layout of the inductors to maintain across the tuning range. In addition, different capacitive coarse-tuning methods are compared based on simulated and measured data obtained from test structures. Implemented in a 90 nm digital CMOS process, a VCO with two extra coupled inductors achieves a 61.9% tuning range with an 11.75 GHz center frequency while dissipating 7.7 mW from a 1.2 V supply. This VCO has a measured phase noise of 106 dBc/Hz at 1 MHz offset from the center frequency resulting in a higher figure-of-merit than other recently published VCOs with similar operating frequencies. In addition, the area overhead is only 30% compared to a conventional LC VCO with a single inductor.Index Terms-Integrated transformers, phase noise, radio-frequency (RF) CMOS, switched coupled inductor, tuning range, voltage-controlled oscillator (VCO).

show abstract

Section: Die Areamentioning

confidence: 99%

Section: B Inductive Tuningmentioning

confidence: 99%

Section: Vco Measurementsmentioning

confidence: 99%

Section: Vco Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Design of Wide Tuning-Range CMOS VCOs Using Switched Coupled-Inductors

Demirkan

Bruss

Spencer

2008

IEEE J. Solid-State Circuits

118

View full text Add to dashboard Cite

show abstract

An 110 GHz CMOS Colpitts VCO based on switched coupled-inductor

Meng

Chi

Wang

2015

Analog Integr Circ Sig Process

View full text Add to dashboard Cite

Research on the Commissioning Method of a Current-controlled Oscillator

Huo

Tian

et al. 2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

In this paper, the commissioning method of the current-controlled oscillator (ICO) is researched, making the ICO work under the required amplitude and frequency and exploring the best phase noise performance of ICO under the constraints of power dissipation and area. Through the theoretical analysis and simulation experiments, the commissioning process of ICO is clarified, which can meet the basic indexes of ICO, especially the amplitude and frequency, and optimize the phase noise performance of ICO.

show abstract

A Dual Band, Wide Tuning Range CMOS Voltage Controlled Oscillator for Multi-Band Radio

Cited by 13 publications

References 10 publications

Design of Wide Tuning-Range CMOS VCOs Using Switched Coupled-Inductors

Design of Wide Tuning-Range CMOS VCOs Using Switched Coupled-Inductors

An 110 GHz CMOS Colpitts VCO based on switched coupled-inductor

Research on the Commissioning Method of a Current-controlled Oscillator

Contact Info

Product

Resources

About