Semiconductor device and driving method thereof
First Claim
1. A semiconductor device driven by a power source providing a power source voltage and a ground voltage, the semiconductor device comprising:
- a resonant circuit;
a demodulation circuit for demodulating an alternating signal generated at the resonant circuit and generating a first demodulation signal; and
a correction circuit for correcting and amplifying the first demodulation signal and generating a second demodulation signal,wherein the first demodulation signal as a digital signal has a Low level potential and a High level potential,wherein the correction circuit corrects the first demodulation signal when the High level potential of the first demodulation signal becomes lower than the power source voltage or when the Low level potential of the first demodulation signal does not become as low as the ground voltage, andwherein an amplitude of the second demodulation signal is equal to an amplitude of the power source voltage.
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Abstract
The invention provides a semiconductor device with high yield by reducing an effect of variations in characteristics of a semiconductor element. Further, by reducing an effect of variations in characteristics of a semiconductor element to improve productivity, an inexpensive semiconductor device can be provided. Further, an inexpensive semiconductor device can be provided by forming a semiconductor device in a large amount over a large substrate such as a glass substrate and a flexible substrate. A semiconductor device of the invention includes a demodulation signal generating circuit and an antenna or a wire for connecting the antenna. The demodulation signal generating circuit includes a demodulation circuit and a correction circuit. The correction circuit corrects a first demodulation signal generated from the demodulation circuit and generates a second demodulation signal.
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Citations
44 Claims
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1. A semiconductor device driven by a power source providing a power source voltage and a ground voltage, the semiconductor device comprising:
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a resonant circuit; a demodulation circuit for demodulating an alternating signal generated at the resonant circuit and generating a first demodulation signal; and a correction circuit for correcting and amplifying the first demodulation signal and generating a second demodulation signal, wherein the first demodulation signal as a digital signal has a Low level potential and a High level potential, wherein the correction circuit corrects the first demodulation signal when the High level potential of the first demodulation signal becomes lower than the power source voltage or when the Low level potential of the first demodulation signal does not become as low as the ground voltage, and wherein an amplitude of the second demodulation signal is equal to an amplitude of the power source voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A semiconductor device driven by a power source providing a power source voltage and a ground voltage, the semiconductor device comprising:
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an antenna; a demodulation circuit for demodulating an alternating signal generated at the antenna and generating a first demodulation signal; and a correction circuit for correcting and amplifying the first demodulation signal and generating a second demodulation signal, wherein the first demodulation signal as a digital signal has a Low level potential and a High level potential, wherein the correction circuit corrects the first demodulation signal when the High level potential of the first demodulation signal becomes lower than the power source voltage or when the Low level potential of the first demodulation signal does not become as low as the ground voltage, and wherein an amplitude of the second demodulation signal is equal to an amplitude of the power source voltage. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A driving method of a semiconductor device comprising:
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providing a power source which provides a power source voltage and a ground voltage; inputting a signal generated at a resonant circuit to a demodulation circuit comprising an analog circuit; inputting a first demodulation signal generated from the demodulation circuit to a correction circuit, wherein the first demodulation signal as a digital signal has a Low level potential and a High level potential; correcting and amplifying the first demodulation signal in the correction circuit when the High level potential of the first demodulation signal becomes lower than the power source voltage or when the Low level potential of the first demodulation signal does not become as low as the ground voltage; and outputting a second demodulation signal, wherein an amplitude of the second demodulation signal is equal to an amplitude of the power source voltage. - View Dependent Claims (43, 44)
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Specification