US 6,982,627 B2 | ||
Low power regulated amplifier for a transponder | ||
Ralph Oberhuber, Kumhausen/Landshut (Germany); Wolfgang Steinhagen, Mauern (Germany); and Franz Prexl, Niederding (Germany) | ||
Assigned to Texas Instruments Incorporated, Dallas, Tex. (US) | ||
Filed on Jun. 13, 2003, as Appl. No. 10/460,824. | ||
Claims priority of application No. 102 29 459 (DE), filed on Jul. 01, 2002. | ||
Prior Publication US 2004/0135673 A1, Jul. 15, 2004 | ||
Int. Cl. H04Q 5/22 (2006.01); H04B 1/16 (2006.01); H03C 1/52 (2006.01) |
U.S. Cl. 340—10.1 | 11 Claims |
1. A transponder comprising:
an antenna;
a demodulator;
a signal processing circuit having an output connected to an input of said demodulator and which converts a modulated signal
received via said antenna into a processed signal applied at the input of said demodulator and suitable for further processing
in said demodulator; and
an amplifier with a predefined amplification factor and a closed loop control circuit serving to maintain the peak-to-peak
voltage swing of the processed signal applied at the input of said demodulator substantially constant.
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