A 5.8-GHz quadrature cross-coupled oscillator

Fernandes, Jorge; Kouwenhoven, Marc; Bos, C. van den; Hartingsveldt, Koen van; Verhoeven, C.J.M.

doi:10.1109/iscas.2002.1011010

Cited by 5 publications

(4 citation statements)

References 4 publications

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“…The advantage of Gm-C filters is that any order filter can be constructed from a passive lowpass prototype. The cross-coupled differential pair has also been used in circuit design before to make simple filters [8][9][10][11], oscillators [12][13][14], and low noise amplifiers [15]. Previously, filter design was advanced by on-chip complementary metal-oxide semiconductor spiral inductors and transformers, albeit with low Qs and requiring comparatively large chip areas making the design of passive and/or active filters all the more attractive [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…Note that not all those filters could be easily biased and many were more straightforward than others. The cross-coupled differential pair has also been used in circuit design before to make simple filters [8][9][10][11], oscillators [12][13][14], and low noise amplifiers [15]. Its main attraction being that it presents a negative resistance that can be used to make oscillators or to tune lossy filters.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On a class of cross coupled fully differential filters

Maundy

Elwakil

Gift

2015

Circuit Theory & Apps

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In this paper, a class of cross-coupled differential filters is presented. The filters implemented are second order, using two transistors cross-coupled surrounded by passive RLC components. The input of each filter is differential and so is its output. Biasing of each filter is straightforward, and the stability of the filters is examined. Several of the filters were built experimentally using discrete components and simulated using SPICE in a 0.18 μm Taiwan Semiconductor Manufacturing Company (TSMC) complementary metal-oxide semiconductor (CMOS) process, confirming the validity of the filters.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On a class of cross coupled fully differential filters

Maundy

Elwakil

Gift

2015

Circuit Theory & Apps

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“…The oscillator/mixer has been implemented using a common cross-coupled relaxation oscillator topology [4], as shown in Fig. 4.…”

Section: B Oscillator/mixermentioning

confidence: 99%

“…In this paper, a solution is proposed which is based on a cross-coupled relaxation oscillator [3], which generates signals that are inherently in quadrature [4]. If mixers were added outside this oscillator, the mismatch of the circuit components in the mixer would cause a loss of accuracy, and not much could be won.…”

Section: Introductionmentioning

confidence: 99%

A 5-GHz combined oscillator/mixer

Bos¹,

Oliveira

Fernandes

et al.

2006 IEEE International Symposium on Circuits and Systems

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In this paper an IQ oscillator/mixer circuit is presented in which the mixers are an integral part of the oscillator. The oscillator alone has accurate quadrature outputs, even in the presence of component mismatch. This precise quadrature is preserved when mixers are incorporated in the oscillator. An oscillator/mixer core for a carrier frequency of 5 GHz, suitable for a low-IF front-end, was designed and tested. The power consumption is 30 mW from a 2.5 V supply, and a phase error of 1º was measured.

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Modeling and analysis of a relaxation oscillator

Buonomo¹,

Schiavo²

Proceedings of the 2005 European Conference on Circuit Theory and Design, 2005.

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A nonlinear analysis of the popular emitter-coupled multivibrator is performed, which is based on the classical discontinuity theory. Exact closed-form expressions for predicting the amplitude of relaxation oscillation and its frequency are obtained. Numerical SPICE simulations were performed to check the validity of the above expressions and to show the errors stemming from the usual assumption of constant capacitor charging current made in previous analyses.

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A 5.8-GHz quadrature cross-coupled oscillator

Cited by 5 publications

References 4 publications

On a class of cross coupled fully differential filters

On a class of cross coupled fully differential filters

A 5-GHz combined oscillator/mixer

Modeling and analysis of a relaxation oscillator

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