A fully integrated five-gyrator filter at video frequencies

Moulding, K.W.; Wilson, Gordon

doi:10.1109/jssc.1978.1051045

Cited by 20 publications

(2 citation statements)

References 4 publications

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“…19. 3 As expected, the noise is shaped by the transfer function of the filter. The total integrated noise voltage of the filter, taking the gain of the ( ) attenuator into consideration, is 0.7 mV .…”

Section: Resultssupporting

confidence: 66%

An enhanced adaptive Q-tuning scheme for a 100-MHz fully symmetric OTA-based bandpass filter

Kallam

Sánchez-Sinencio

Karsilayan

2003

IEEE J. Solid-State Circuits

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A tuning scheme for continuous-time high-biquad filters is presented. An improvement over the existing implementation of the modified-LMS-tuning scheme is proposed and efficiently combined with the frequency tuning based on phase-locked loops. The proposed scheme takes much less area without compromising the accuracy achieved previously. The proposed unifiedand 0-tuning scheme does not require the-tuning loop to be slower than the 0-tuning loop. The optimal case is to have equal speeds for both loops. Also, a low-voltage pseudo-differential operational transconductance amplifier with inherent common-mode feedforward is introduced. The structure is fully symmetric and suitable for high-frequency applications. An experimental test chip is fabricated in standard CMOS 0.5-technology, with a bandpass filter of center frequency 100 MHz and of 20, along with the proposed tuning scheme. The measured-tuning error is around 1%. Expected and experimental results are in good agreement.

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Section: Resultssupporting

confidence: 66%

An enhanced adaptive Q-tuning scheme for a 100-MHz fully symmetric OTA-based bandpass filter

Kallam

Sánchez-Sinencio

Karsilayan

2003

IEEE J. Solid-State Circuits

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“…Moulding [5] observed that at a high frequencies, non-ideal transconductors generate additional negative conductance. Figure 2 illustrates a gyratorbased tank, where amplifier parasitics manifest itself in a form of an arbitrary phase lag of φ/2 radians of each transconductor.…”

Section: Active Inductor With Negative Resistance A) High Frequencmentioning

confidence: 99%

Analysis and design of oscillators based on low-voltage self-oscillating active inductors

Szczepkowski

Farrell

2010

IET Irish Signals and Systems Conference (ISSC 2010)

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-This paper presents a new consistent analysis of self-oscillating active inductors together with a complete design example of a 90 nm CMOS current controlled oscillator (CCO) for ISM applications. Using the proposed passive compensation method in place of a standard negative impedance converter, typical performance of active inductor oscillator is achieved with reduced static power consumption. The article presents a small signal, large signal and phase noise analysis of the proposed oscillator together with related design trade-offs. Theoretical results are confirmed by a simulation of current controlled oscillator designed using UMC 90 nm 1P9M RF process libraries. The proposed circuit achieves a relative tuning range of 26% with a 434 MHz carrier frequency and average in band phase noise of -92 dBc/Hz at 1 MHz offset. The maximum power consumption of the oscillator core is only 2 mW from a 1 V supply.

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Tuning in Continuous-time Filters

High Frequency Continuous Time Filters in Digital CMOS Processes

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A fully integrated five-gyrator filter at video frequencies

Cited by 20 publications

References 4 publications

An enhanced adaptive Q-tuning scheme for a 100-MHz fully symmetric OTA-based bandpass filter

An enhanced adaptive Q-tuning scheme for a 100-MHz fully symmetric OTA-based bandpass filter

Analysis and design of oscillators based on low-voltage self-oscillating active inductors

Tuning in Continuous-time Filters

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