Abstract
This paper deals with the analysis of dynamic behaviour of half-wave rectifiers and compares circuit solutions using standard operational amplifiers and current conveyors as active elements. The voltage and current sourcing principle and their influence to dynamic limits of diodes are given. Using the voltage or current biasing scheme, improvements in the dynamic performance of the diodes and rectifier are shown and discussed. The theoretical conclusions are supported by experimental results. DOI: http://dx.doi.org/10.5755/j01.eee.20.2.6382
Highlights
For the design of analogue circuits a number of active elements can be used
If the voltage buffer is omitted, the operational transconductance amplifier (OTA) is defined [1]. Another group of active elements used for the design of analogue function blocks are the current conveyors (CCs) and their three generation CCI [2], CCII [3], and CCIII [4], where the second generation current conveyor (CCII) is probably mostly discussed one
Based on the experimental measurements, it has been shown that compared to circuits using voltage feedback amplifier (VFA), better dynamic performance can be achieved, without any discussion of the reasons
Summary
For the design of analogue circuits a number of active elements can be used. Probably, the most known is the voltage feedback amplifier (VFA), more often called as operational amplifier (opamp). If the voltage buffer is omitted, the operational transconductance amplifier (OTA) is defined [1] Another group of active elements used for the design of analogue function blocks are the current conveyors (CCs) and their three generation CCI [2], CCII [3], and CCIII [4], where the second generation current conveyor (CCII) is probably mostly discussed one. Thanks to the infinite voltage gain and infinite transit frequency (fT) of the opamp, the behaviour of the function blocks using this active element is described by the feedback suitably created in the circuit [1]. Been presented on circuits using current conveyors, respectively Using these techniques, it has been shown that the dynamic performance of non-linear circuits employing conveyors as active elements can be further improved but again, without giving any description of the reasons. The dynamic behaviour of the diodes is given and based on the analysis results, the techniques leading to improvements of the non-linear circuits dynamic behaviour are described in more details
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