Name
Abstract | ||
|---|---|---|
It has recently been proposed by a few authors that the trigonometric Pythagorean identity can be used for the implementation of precision full-wave rectifiers for sinusoidal signals with advantages with respect to diode-based rectifiers for amplitudes in the hundreds of mV range. The approaches proposed so far require a 900 phase shifter and this results in the obvious limitation that the input signal frequency must be known prior to amplitude measurement. In this study, the authors propose a new precision full-wave rectifier, capable of overcoming this limitation. Starting from the sinusoidal input, a squared co-sinusoidal signal is obtained in a wide frequency range by multiplying the output signals of an integrator and of a differentiator. The signal thus obtained is added to the input signal squared, and a square root extractor is employed for obtaining a DC signal proportional to the amplitude of the input signal. A prototype capable of operating within a two decades frequency range across 3200 Hz has been realised and tested with an accuracy better than 2% and a residual ripple of less than 0.3% for input amplitudes larger than 100 mV. A configuration capable of operating in the MHz frequency range is also proposed. |
Year | DOI | Venue |
|---|---|---|
2012 | 10.1049/iet-cds.2012.0140 | Circuits, Devices & Systems, IET |
Keywords | Field | DocType |
diodes,phase shifters,rectifying circuits,diode-based rectifiers,full-wave rectifiers,phase shifter,sinusoidal signals,square root extractor,trigonometric Pythagorean identity,wide bandwidth Pythagorean rectifier | Rectifier,Differentiator,Control theory,Integrator,Electronic engineering,Bandwidth (signal processing),Phase shift module,Ripple,Amplitude,Mathematics,Pythagorean trigonometric identity | Journal |
Volume | Issue | ISSN |
6 | 6 | 1751-858X |
Citations | PageRank | References |
0 | 0.34 | 4 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Graziella Scandurra | 1 | 4 | 5.03 |
| Cannatà, G. | 2 | 0 | 0.34 |
| Carmine Ciofi | 3 | 8 | 5.62 |