A new measurement approach for phase noise at close-in offset frequencies of free-running oscillators

Zhang, X.; Rizzi, B. J.; Kramer, J. J.

doi:10.1109/22.554656

Cited by 22 publications

(6 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…But at low injection power levels, the locking range reduces and the phase noise approaches its intrinsic level as shown in Fig. 34 (b) [28]- [30]. Fig.…”

Section: Ghz Vco In Bicmosmentioning

confidence: 96%

Designing LC VCOs Using Capacitive Degeneration Techniques

Jung¹,

Harjani²

2005

Int. J. Hi. Spe. Ele. Syst.

View full text Add to dashboard Cite

In this paper, we present a detailed analysis of VCOs using a capacitively degenerated negative resistance cell. The negative resistance cell using capacitive degeneration has a higher maximum attainable oscillation frequency and a smaller equivalent shunt capacitance when compared to the widely used cross-coupled negative-^™ cell. These properties are of particular interest for the design of high-frequency and/or wide tuning range VCOs. The negative resistance provided by a traditional capacitively degenerated negative resistance cell is lower than that provided by a cross-coupled negative-g m cell.We present an active capacitive degeneration topology that overcomes this limitation. To validate this circuit topology we use two test vehicles. The first test vehicle is a 5.3 GHz VCO designed in a 0.25 /jm CMOS technology and the second test vehicle is a 20 GHz VCO designed in a 0.25/im BiCMOS technology. Measurement and simulation results from both test vehicles effectively demonstrate the efficacy of the capacitive degeneration technique.

show abstract

“…But at low injection power levels, the locking range reduces and the phase noise approaches its intrinsic level as shown in Fig. 34 (b) [28]- [30]. Fig.…”

Section: Ghz Vco In Bicmosmentioning

confidence: 96%

Designing LC VCOs Using Capacitive Degeneration Techniques

Jung¹,

Harjani²

2005

Int. J. Hi. Spe. Ele. Syst.

View full text Add to dashboard Cite

show abstract

“…Injection locking is also used for phase noise measurements [6]. The phase noise of the free-running oscillator is then calculated using the equation below [7]:…”

Section: Measurementmentioning

confidence: 99%

“…Injection locking is also used for phase noise measurements [6]. The phase noise of the free‐running oscillator is then calculated using the equation below [7]: where L DUT free ( f m ) is the phase noise of the free‐running VCO under test as a function of offset frequency f m , L DUT locked ( f m ) is the phase noise of the injection‐locked VCO, Δ f lock is the injection locking bandwidth, and L inj ( f m ) is the phase noise of the injected reference signal.…”

Section: Component Designmentioning

confidence: 99%

“…Specially, UWB technology, which simultaneously offers high data rate wireless communication and high-accuracy positioning capability, has progressed tremendously in recent years. The bandpass filter for the application of UWB requires fractional bandwidth of about 110%, sharp out of band rejection, low insertion loss, and flat group delay [1][2][3][4][5][6]. Then, recently many bandpass filters for UWB have been studied through the use of matured design technologies.…”

Section: Introductionmentioning

confidence: 99%

“…4 and 5. The microstrip line filter with backside aperture on the ground plane was implemented to enhance the coupling and pass bandwidth [6].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A CMOS QPSK demodulator frontend for a PON ONU

Chen

Bespalko

Frank

2011

Micro & Optical Tech Letters

View full text Add to dashboard Cite

A quadrature phase‐shift keying (QPSK) demodulator frontend for a passive optical network (PON) optical network unit receiver fabricated in CMOS 0.13‐μm technology is presented. The frontend integrates a compact 5‐GHz ring quadrature voltage‐controlled oscillator (QVCO), two inductor‐less broadband mixers, and two second‐order LC ladder low‐pass filters. The broadband mixers operate with an input frequency between 2.5 and 7.5 GHz and with an input 1‐dB compression point of −5 dBm. Area‐saving design techniques are applied to lower the cost of the terminal receivers, because a competitive cost is a key requirement for the deployment of the PON access network. The frontend circuit presented achieves an area savings of more than 90% for the QVCO and mixers when compared with some published designs that can also fit the application. Measurement and simulation results are presented to verify that this frontend can be used to demodulate a QPSK signal with a data rate as high as 5 Gb/s, which is twice the downstream data rate of the current Gigabit PON standard. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1056–1062, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25902

show abstract

Oscillators

Gautier¹

2014

Design of Microwave Active Devices

View full text Add to dashboard Cite

A new measurement approach for phase noise at close-in offset frequencies of free-running oscillators

Cited by 22 publications

References 8 publications

Designing LC VCOs Using Capacitive Degeneration Techniques

Designing LC VCOs Using Capacitive Degeneration Techniques

A CMOS QPSK demodulator frontend for a PON ONU

Oscillators

Contact Info

Product

Resources

About