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

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 c...

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Bibliographic Details
Published in:International journal of electronics 2010-05, Vol.97 (5), p.491-498
Main Authors: Pal, Kirat, Psychalinos, Costas
Format: Article
Language:English
Subjects:
all-pass filters
analogue signal processing
Applied sciences
Circuit properties
Comparative analysis
Current conveyors
Digital circuits
Electric, optical and optoelectronic circuits
Electronic circuits
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Exact sciences and technology
Frequency filters
Metal oxide semiconductors
Metal oxides
Metals
Resistors
Semiconductor devices
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Semiconductors
Topology
Transistors
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Description
Summary: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.
ISSN:0020-7217
1362-3060
DOI:10.1080/00207210903486872