Your browser does not support JavaScript!
http://iet.metastore.ingenta.com
1887

Wide bandwidth Pythagorean rectifier

Wide bandwidth Pythagorean rectifier

For access to this article, please select a purchase option:

Buy article PDF
£12.50
(plus tax if applicable)
Buy Knowledge Pack
10 articles for £75.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Name:*
Email:*
Your details
Name:*
Email:*
Department:*
Why are you recommending this title?
Select reason:
 
 
 
 
 
IET Circuits, Devices & Systems — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

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 90° 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.

References

    1. 1)
      • Kumngern, M.: `CMOS precision full-wave rectifier using current conveyor', Int. Conf. Electron Devices and Solid-State Circuits, December 2010, Hong Kong, China, p. 1–4.
    2. 2)
      • Koton, J., Herencsar, N., Vrba, K., Cicekoglu, O.: `Versatile precision full-wave rectifier using current and voltage conveyor', Int. Conf. Applied Electronics, September 2010, Pilsen, Czech Republic, p. 1–4.
    3. 3)
      • Khan, I.M., Khan, S., Alam, A.H.M.Z., Khalifa, O.O.: `Analysis of rectifier circuits for low power and sensing applications', 2011 Fourth Int. Conf. Mechatronics (ICOM), 17–19 May 2011, Kuala Lumpur, Malaysia, p. 1–4.
    4. 4)
    5. 5)
      • Analog Devices Inc.: ‘AD734: 10 MHz, 4-quadrant multiplier/divider’. Analog Devices Inc., Norwood, MA, February 2011, available at: http://www.analog.com/static/imported-files/data_sheets/AD734.pdf.
    6. 6)
    7. 7)
    8. 8)
    9. 9)
      • Analog Devices Inc.: ‘AD633: low cost analog multiplier’. Analog Devices Inc., Norwood, MA, February 2012, available at: http://www.analog.com/static/imported-files/data_sheets/AD633.pdf.
    10. 10)
    11. 11)
    12. 12)
      • C. Toumazou , F.J. Lidgey . Fast current-mode precision rectifier. Electron. Wirel. World , 1621 , 1115 - 1118
    13. 13)
      • Analog Devices Inc.: ‘AD8021: low noise, high speed amplifier for 16-bit systems’. Analog Devices Inc., Norwood, MA, May 2006, available at: http://www.analog.com/static/imported-files/data_sheets/AD8021.pdf.
    14. 14)
    15. 15)
    16. 16)
    17. 17)
    18. 18)
      • Kaewpoonsuk, A., Katman, R., Kamsri, T., Rerkratn, A., Riewruja, V.: `A simple amplitude detector-based demodulator for resolver converters', Int. Conf. Control Automation and Systems, October 2010, Kintex, Gyeonggi-do, Korea, p. 370–373.
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-cds.2012.0140
Loading

Related content

content/journals/10.1049/iet-cds.2012.0140
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading
This is a required field
Please enter a valid email address