Flicker noise up-conversion
WebMay 23, 2004 · The use of lateral BJT current sources in VCOs reduces flicker noise up-conversion, which is a critical need for systems with stringent close-in phase noise specifications. The VCO achieves a simulated phase noise of -93dBC/Hz at 100kHz offset and draws 4mA from a single 2.5V power supply; the VCO tuning range is 18%. View on … WebSuppression of flicker noise up-conversion in a 65-nm CMOS VCO in the 3.0-to-3.6 GHz band IEEE Journal of Solid-State Circuits Okt. 2013 …
Flicker noise up-conversion
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WebFeb 1, 2024 · We identify that non-resistive terminations of both 2nd and 3rd harmonic currents contribute to oscillation waveform asymmetries that lead to the flicker noise upconversion. Further, we... WebAug 9, 2009 · Through this mechanism, all the noise sources present in the oscillator circuit that cause amplitude modulation noise produce, in turn, frequency and phase noise. [1] Other mechanisms not related to voltage-dependent capacitances exist, and these may cause additional noise up-conversion.
WebMay 3, 2013 · In this paper, the flicker noise up-conversion mechanisms in a voltage-biased topology are deeply investigated, providing general design guidelines for its mitigation. An improved VCO architecture is then introduced, where a segmented … WebFeb 1, 2016 · The contribution of different mechanisms responsible for flicker noise to phase noise conversion is investigated from a theoretical point of view. Impulse sensitivity function theory is exploited to quantify flicker noise to phase noise conversion process from both tail and core transistors.
WebMay 27, 2015 · Flicker noise from tail-biasing transistors is reduced by self-switched biasing technology, and the up-conversion of flicker noise from cross-coupled pair is … WebJul 1, 2013 · Traditional design of voltage-controlled oscillators (VCOs) can lead to unacceptable degradation of the phase-noise component when a …
WebJul 29, 2013 · Flicker noise up-conversion in voltage-biased oscillators can be effectively suppressed by inserting resistances in series to the drain of the …
random reboot without bugcheckWebNov 1, 2024 · The ISF and flicker noise evaluation of NMOS M1 is derived as follow steps: 1) In order to obtain the ISF h D S ( t) of M1, the current source isin used in PSS + PXF simulation is connected in parallel with the source and drain of M1, as shown in Fig. 4 left. 2) The test-bench shown in Fig. 4 right is used to obtain the I 1 / f, r m s ( t) of M1. random recallWebApr 3, 2024 · The flicker noise up-conversion is suppressed by making the drain impedance of the cross-coupled transistors to be a real number at the second harmonic of the oscillation. The loaded quality factor is boosted and the noise contribution from the transconductor of the VCO is reduced by introducing a negative source impedance. random receipt number generatorWebOct 27, 2024 · Therefore, the reduction of phase noise and the extension of tuning range are achieved simultaneously. Meanwhile, the digitally controlled tail-resistor array is used to optimize the flicker noise up-conversion in wideband. Prototyped in 40-nm CMOS, the proposed oscillator exhibits a 73.2% tuning range from 18.6 to 40.1 GHz. random records sqlWebOct 1, 2024 · By adding a source-bridging capacitor between the sources of the transistors that are connected to the two feedback transformers, the phase noise at $1/ f^ {3}$ region is improved due to the suppression of flicker noise up-conversion. The proposed VCO is implemented in a 22nm FD-SOI technology with a low supply voltage of 0.65V. random realistic artworkWebFlicker noise, well known as 1/f noise, has an amplitude that changes over frequency. The fl icker noise is random in nature and is caused by defects in the semiconductor lattice structure, as a result of combination and recombination of carriers within the crystal. Unlike the thermal and shot noise, fl icker noise decreases with frequency. random recipe for dinnerWebSuppression of flicker noise upconversion in a 65nm CMOS VCO in the 3.0-to-3.6GHz band Abstract: This work proposes a method to suppress upconversion of flicker noise of switching FETs in LC VCOs over a wide tuning range, without compromising startup and 1/f noise and with no trimming. random really long words