Synthesis for Butterworth Filter Using Compact VDTA Based on Sallen- Key Topology

Background: The original filter including grounded or virtual ground capacitors can be synthesized by using the NAM expansion. However, so far the filters including floating capacitor, such as Sallen-Key filter, have not been synthesized by means of the NAM expansion. This is a problem to be researched further. Methods: By using the adjoint network theory, the Sallen-Key filter including floating capacitor first is turned into a current-mode one, which includes a grounded capacitor and a virtual ground capacitor. Then the node admittance matrix, after derived, is extended by using NAM expansion. Results: At last, one VDTA Sallen-Key filter is received. It employs single compact VDTA and two grounded capacitors. Conclusion: A Butterworth VDTA second-order frequency filter based on Sallen-Key topology with fo = 100kHz, HLP = -HBP=1, is designed.

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Digitally Controllable Current Amplifier and Current Conveyors in Practical Application of Controllable Frequency Filter

Journal of Electrical Engineering ◽

10.1515/jee-2016-0038 ◽

2016 ◽

Vol 67 (4) ◽

pp. 261-266 ◽

Cited By ~ 1

Author(s):

Josef Polak ◽

Jan Jerabek ◽

Lukas Langhammer ◽

Roman Sotner ◽

Jan Dvorak ◽

...

Keyword(s):

Current Mode ◽

Current Gain ◽

Current Conveyors ◽

Practical Realization ◽

Frequency Filter ◽

Practical Application ◽

Independent Control ◽

Current Amplifier ◽

Single Input ◽

A Current

Abstract This paper presents the simulations results in comparison with the measured results of the practical realization of the multifunctional second order frequency filter with a Digitally Adjustable Current Amplifier (DACA) and two Dual-Output Controllable Current Conveyors (CCCII +/−). This filter is designed for use in current mode. The filter was designed of the single input multiple outputs (SIMO) type, therefore it has only one input and three outputs with individual filtering functions. DACA element used in a newly proposed circuit is present in form of an integrated chip and the current conveyors are implemented using the Universal Current Conveyor (UCC) chip with designation UCC-N1B. Proposed frequency filter enables independent control of the pole frequency using parameters of two current conveyors and also independent control of the quality factor by change of a current gain of DACA.

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Analysis and Design of a Current-Mode PWM Buck Converter Adopting the Output-Voltage Independent Second-Order Slope Compensation Scheme

IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences ◽

10.1093/ietfec/e88-a.2.490 ◽

2005 ◽

Vol E88-A (2) ◽

pp. 490-497 ◽

Cited By ~ 13

Author(s):

H. SAKURAI

Keyword(s):

Output Voltage ◽

Current Mode ◽

Second Order ◽

Buck Converter ◽

Compensation Scheme ◽

Analysis And Design ◽

Slope Compensation ◽

A Current

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Synthesis of a current mode second order band pass filter using the Genetic Algorithm

2019 5th International Conference on Optimization and Applications (ICOA) ◽

10.1109/icoa.2019.8727706 ◽

2019 ◽

Cited By ~ 1

Author(s):

EL BEQAL Asmae ◽

BENHALA Bachir ◽

GARBAYA Amel ◽

KOTTI Mouna ◽

FAKHFAKH Mourad ◽

...

Keyword(s):

Genetic Algorithm ◽

Current Mode ◽

Second Order ◽

Band Pass Filter ◽

Pass Filter ◽

Band Pass ◽

A Current

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A 3rd-order current-mode filter in 0.12 μm CMOS

Advances in Radio Science ◽

10.5194/ars-6-201-2008 ◽

2008 ◽

Vol 6 ◽

pp. 201-204 ◽

Cited By ~ 4

Author(s):

R. Kolm ◽

H. Zimmermann

Keyword(s):

Dynamic Range ◽

Software Radio ◽

Current Mode ◽

Current Steering ◽

Butterworth Filter ◽

Current Consumption ◽

Noise Density ◽

Current Steering Dac ◽

A Current

Abstract. For software radio applications in system-on-chips, a 3rd-order current-mode Butterworth filter in 120 nm CMOS is realized. This filter is used for reconstruction purposes between a current-steering DAC and a current-mode mixer. Power can be reduced by using a current-mode architecture. The cut-off frequency of this filter is switchable between 1 MHz and 4 MHz, the current consumption is 4.5 mA at VDD=1.5 V, the inband noise density is 100 pA/√Hz and it has a dynamic range up to 65 dB.

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CDBA based current instrumentation amplifier

Journal of Communications Technology Electronics and Computer Science ◽

10.22385/jctecs.v4i0.62 ◽

2016 ◽

Vol 4 ◽

pp. 11 ◽

Cited By ~ 3

Author(s):

Priyanka Gupta ◽

Kunal Gupta ◽

Neeta Pandey ◽

Rajeshwari Pandey

Keyword(s):

Current Mode ◽

Instrumentation Amplifier ◽

Pspice Simulations ◽

Differential Gain ◽

Novel Method ◽

Current Difference ◽

A Current

This paper presents a novel method to realize a current mode instrumentation amplifier (CMIA) through CDBA (Current difference Buffered Amplifier). It employs two CDBAs and two resistors to obtain desired functionality. Further, it does not require any resistor matching. The gain can be set according to the resistor values. It offers high differential gain and a bandwidth, which is independent of gain. The working of the circuit is verified through PSPICE simulations using CFOA IC based CDBA realization.

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