Transmission apparatus for a wireless device using delta-sigma modulation
First Claim
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1. A transmission apparatus for a wireless device, comprising:
- an antenna for receiving an original signal and for backscattering a modulated signal containing information from the wireless device;
a variable impedance coupled to the antenna, the variable impedance having an impedance value;
a delta-sigma modulator coupled to the variable impedance for modulating the impedance value, and thereby a backscattering coefficient for the antenna, in accordance with the information to generate the modulated signal; and
,a decoder coupled to the delta-sigma modulator for generating the impedance value from the information.
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Abstract
A transmission apparatus for a wireless device, comprising: an antenna for receiving an original signal and for backscattering a modulated signal containing information from the wireless device; a variable impedance coupled to the antenna, the variable impedance having an impedance value; a delta-sigma modulator coupled to the variable impedance for modulating the impedance value, and thereby a backscattering coefficient for the antenna, in accordance with the information to generate the modulated signal; and, a decoder coupled to the delta-sigma modulator for generating the impedance value from the information.
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Citations
65 Claims
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1. A transmission apparatus for a wireless device, comprising:
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an antenna for receiving an original signal and for backscattering a modulated signal containing information from the wireless device; a variable impedance coupled to the antenna, the variable impedance having an impedance value; a delta-sigma modulator coupled to the variable impedance for modulating the impedance value, and thereby a backscattering coefficient for the antenna, in accordance with the information to generate the modulated signal; and
,a decoder coupled to the delta-sigma modulator for generating the impedance value from the information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 60, 61, 62)
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31. A transmission apparatus for a wireless device, comprising:
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an inductor for receiving an original signal and for transmitting by mutual inductance a modulated signal containing information from the wireless device; a variable impedance coupled to the inductor, the variable impedance having an impedance value; a delta-sigma modulator coupled to the variable impedance for modulating the impedance value, and thereby a value of the mutual inductance, in accordance with the information to generate the modulated signal; and
,a decoder coupled to the delta-sigma modulator for generating the impedance value from the information. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 63, 64, 65)
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Specification