New CMOS realization of the CCII-

Awad, Inas A.; Soliman, Ahmed M.

doi:10.1109/82.755417

Cited by 40 publications

(8 citation statements)

References 6 publications

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“…The main advantage of the CCII is the larger frequency range in comparison with the standard OpA. For example, in papers [25], [26] CMOS current conveyors with the frequency range up to 100 MHz are described.…”

Section: A a New Approach To The Design Of High-frequency Filters Wimentioning

confidence: 99%

Channel filters for microelectronic receivers of wireless systems

Коротков

Morozov

Tutyshkin

et al. 2005

2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications

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A short overview of receiver architectures and low-pass filter specifications for wireless systems is reported. Two design procedures of lowpass filters for communication system are discussed. A CMOS transconductance-capacitor (G m -C) filter with enhanced linearity is presented as the first one. The proposed design is based on a transconductance amplifier with enhanced linearity. For the elimination of the amplifier harmonic level the compensation principle is used. The device was realized as a balanced fifth-order 1MHz low-pass Bessel filter in 0.35µm CMOS process. The filter operates with a low supply voltage of +2.5 Volt. Its power consumption is 8.25 mW, the input referred RMS noise is 120 µV (0.01 ÷ 2 MHz), and HD3 (1V P-to-P @ 1MHz) is -54 dB. Alternatively a new approach to the design of high-frequency filters with low power consumption is presented. The idea is to use current mode and voltage mode active elements with enhanced frequency range. These elements are second generation current conveyors and voltage buffers, those are used to implement integrators. The filter is realized as a switched-capacitor circuit based on an integrator chain with multi feedback loops. As an example a CMOS switched-capacitor filter with 1MHz cut-off frequency is presented. The device was realized as an unbalanced fifth-order low-pass Chebyshev filter in 0.35µm CMOS process. The filter operates with supply voltage varying from +2.5V to +3V. Depending on the supply voltage its power consumption is from 3 mW to 10 mW, the input referred RMS noise is 1.9 mV (0.02 ÷ 2 MHz@+3V), and HD3 (2V P-to-P @ 900kHz @ +3V) is -54 dB.Index Terms -High-frequency microelectronic filter, cell phones, Bluetooth, WLAN, DECT, low power consumption, G m -C filter, transconductance amplifier, second generation current conveyor, switched-capacitor filter, dummy switch, voltage buffer.

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Section: A a New Approach To The Design Of High-frequency Filters Wimentioning

confidence: 99%

Channel filters for microelectronic receivers of wireless systems

Коротков

Morozov

Tutyshkin

et al. 2005

2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications

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“…In the controlled current conveyor structure [1], the simplest way to decrease the undesired parasitic resistor at the X terminal is to use sufficiently high biasing current, but this will increase the power consumption. It should be mentioned that there are some current conveyor structures having low parasitic resistance at their X terminal such as the circuit reported in [2], but these are not current controlled type. On the other hand, in analog circuit design engineering, the use of only one type of current conveyor simplifies the configuration [3,4].…”

Section: Introductionmentioning

confidence: 97%

Parasitic compensation in CCI-based circuits for reduced power consumption

Metin¹,

Mınaeı²

2010

Analog Integr Circ Sig Process

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In this paper, the compensation advantage of the first-generation current conveyor (CCI) over the secondgeneration current conveyor (CCII) in tunable circuits is shown. For this purpose, a new floating frequency dependent negative resistor (FDNR) simulator using three CCIs is presented and employed in a third-order high-pass filter. The compensation feature of the CCI is shown for the proposed high-pass filter. As a second example, the presented compensation method is tested in a second-order band-pass filter constructed with two CCIs. Applying the proposed compensation technique, the CCI-based circuits can operate in lower biasing currents, which result in lower power consumption.

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“…This is because it offers wider signal bandwidth and higher linearity than those of the conventional op-amp configuration. Thus, the realisation of various active filter transfer functions using CCIIs has received considerable attention (Sedra and Smith 1970;Surakampontorn, Riewruja, Kumwachara and Dejhan 1991;Elwan and Soliman 1996;Fabre, Said, Wiest and Boucheron 1996;Elwan and Soliman 1997;Awad and Soliman 1999;Barthelemy and Fabre 2002). The CCIIs that are introduced by Fabre et al (1996) and Barthelemy and Fabre (2002) have a positive/negative intrinsic resistance with a value R x ¼ V T /I o , where V T is the well-known thermal voltage and I o is the bias current.…”

Section: Introductionmentioning

confidence: 99%

All-pass filters realised using the current-controlled CCII with intrinsic negative resistance

Pal

Psychalinos

2010

International Journal of Electronics

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Novel first-order all-pass filter configurations are introduced in this article for the first time using CCIIs with negative intrinsic resistance. The first one offers the benefit of the high-impedance input with a simultaneous reduction of the number of required passive elements. In addition, one current conveyor and an appropriate adder are required instead of the two current conveyors employed in the corresponding earlier topology. The second proposed all-pass filter has the attractive characteristic, in comparison with those already published in the literature, that only a single current conveyor is required. In both these configurations, a single grounded resistor is required as a passive element. Thus, these configurations can be made resistorless using metal-oxide semiconductor field-effect transistors and, also the condition of realisability can be electronically satisfied.

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New CMOS realization of the CCII-

Cited by 40 publications

References 6 publications

Channel filters for microelectronic receivers of wireless systems

Channel filters for microelectronic receivers of wireless systems

Parasitic compensation in CCI-based circuits for reduced power consumption

All-pass filters realised using the current-controlled CCII with intrinsic negative resistance

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