Design of bipolar RF ring oscillators

Finocchiaro, Salvatore; Palmisano, G.; Salerno, R.; Sclafani, C.

doi:10.1109/icecs.1999.812210

Cited by 9 publications

(3 citation statements)

References 13 publications

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“…Recently, non-linear QOs have exploited techniques using internal capacitances of either MOS [21], [22] or BJTs [23], [24] for high oscillation frequency between 0.9 to 2.5 GHz. However, the ratios of the oscillation frequency (f 0 ) to the unity-gain frequency (f T ) [7] of a transistor are in the region of 0.1 to 0.2 whilst the power consumptions are relatively high between 7.01 to 100 mW.…”

Section: Introductionmentioning

confidence: 99%

A low-power high-frequency all-pass-filter-based sinusoidal quadrature oscillator using CMOS current mirrors

Leelasantitham

Srisuchinwong

2009

2008 International Symposium on Intelligent Signal Processing and Communications Systems

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A low-power high-frequency sinusoidal quadrature oscillator is presented through the use of two allpass current mirror (CM)-based filters, a 1st-order CM lowpass filter and a CM bilinear transfer function. The bilinear transfer function is described in terms of a negative resistance (R N = -R L ) where R L is a resistor load of a current mirror. The technique is relatively simple based on (i) inherent time constants of current mirrors, i.e. the internal capacitances and the transconductance of a diode-connected NMOS, (ii) a simple negative resistance R N formed by a resistor load R L of a current mirror. Neither external capacitances nor inductances are required. As a particular example, a 1.01-GHz, 0.6-mW, 2-V CMOS all-pass-filter-based all-current-mirror sinusoidal quadrature oscillator is demonstrated in this paper. The oscillation frequency (f 0 ) is 1.01 GHz and is current-tunable over a range of 400 MHz or 40 %. The power consumption is at approximately 0.6 mW. The amplitude matching and the quadrature phase matching are better than 0.05 dB and 0.15°, respectively. Total harmonic distortions (THD) are less than 0.5 %. At 2 MHz offset from the 1.01 GHz, the carrier to noise ratio (CNR) is 83.01 dBc/Hz whilst the figure of merit called a normalized carrier-to-noise ratio (CNR norm ) is 139.29 dBc/Hz. The ratio of the oscillation frequency (f 0 ) to the unity-gain frequency (f T ) of a transistor is 0.134.

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Section: Introductionmentioning

confidence: 99%

A low-power high-frequency all-pass-filter-based sinusoidal quadrature oscillator using CMOS current mirrors

Leelasantitham

Srisuchinwong

2009

2008 International Symposium on Intelligent Signal Processing and Communications Systems

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“…1a). A number of experimental results on the phase noise of static dividers have been reported so far [2,3]. However, no analytical model based on the device parameters, underlying the circuit was provided until now.…”

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confidence: 99%

Phase noise prediction for static frequency dividers and ring oscillators

Dyskin

Kallfass

2018

Electron. lett.

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This Letter presents a method of predicting the phase noise limits of static frequency dividers. The proposed phase noise model for freerunning and injection-locked modes is based on the circuit parameters only. The model provides an intuitive comprehension of the phase noise behaviour of static frequency dividers and is proved to be useful in primary hand calculations. The method was verified against measurement results of a static frequency divider-by-two, operated at 77 GHz and fabricated in a SiGe 0.13mm process.

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“…Research was done into methods of designing them for high speeds, approaching fMAX. Simple bipolar ring oscillator design is discussed in [21]. A quadrature generating ring VCO at f MAX /4 with a single phase at f MAX /2 is described in [22], which uses a reverse-biased junction for control.…”

Section: Vcosmentioning

confidence: 99%

SiGe HBT BiCMOS for 2-160 Gb/s Next Generation Internet (NGI)

McDonald¹

2003

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Design of bipolar RF ring oscillators

Cited by 9 publications

References 13 publications

A low-power high-frequency all-pass-filter-based sinusoidal quadrature oscillator using CMOS current mirrors

A low-power high-frequency all-pass-filter-based sinusoidal quadrature oscillator using CMOS current mirrors

Phase noise prediction for static frequency dividers and ring oscillators

SiGe HBT BiCMOS for 2-160 Gb/s Next Generation Internet (NGI)

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