Abstract
A new precision peak detector/full-wave rectifier of input sinusoidal signals, based on usage of dual-output current conveyors, is presented in this paper. The circuit gives a DC output voltage that is the peak input voltage over a wide frequency range, with a very low ripple voltage and low harmonic distortion. The proposed circuits use an all-pass filter as a 90° phase shifter of the processed input signal. To verify the theoretical analysis, the circuit SPICE simulations results have also been included, showing good agreement with the theory. Inherently, the circuit is well suited for IC implementation.
Highlights
Precise full-wave rectification function is one of the important requirements in many applications, such as instrumentation and measurement [1,2]
The current-mode (CM) circuits, such as the second-generation current conveyors CCIIs, have received considerable attention due to their better linearity, wider bandwidth, larger dynamic range, and low power dissipation compared with their voltage-mode counter-parts, such as operational amplifiers (OAs) [3,4,5]
The CCIIs, first introduced in [6], are functionally flexible and versatile. They have been used in a very large number of different applications such as universal filters, inductor simulators, capacitance multipliers, oscillators, full-wave rectifiers [7,8,9,10,11]. It is the use of CCIIs, due to high output impendence of the current conveyor, that makes it possible to overcome the turn-on resistance of the diode, permitting the rectification of low-level signals and responding to frequencies over 100 kHz
Summary
Precise full-wave rectification function is one of the important requirements in many applications, such as instrumentation and measurement [1,2]. They have been used in a very large number of different applications such as universal filters, inductor simulators, capacitance multipliers, oscillators, full-wave rectifiers [7,8,9,10,11] It is the use of CCIIs, due to high output impendence of the current conveyor, that makes it possible to overcome the turn-on resistance of the diode, permitting the rectification of low-level signals (in most of the cases rectifier was based on usage of diodes) and responding to frequencies over 100 kHz. The paper [8,10] has extended the frequency range by using voltage and current biasing schemes. Computer simulation results, using SPICE program, are given to demonstrate the performance of the proposed peak detector/full-wave rectifier
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