Semiconductor device
First Claim
1. A semiconductor device comprising:
- a divider circuit for dividing a carrier;
a demodulated signal separation circuit for generating a plurality of demodulated signals using a demodulated signal demodulated from the carrier; and
a correction circuit for generating a clock signal using an output signal from the divider circuit and the plurality of demodulated signals supplied from the demodulated signal separation circuit.
1 Assignment
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Accused Products
Abstract
The invention provides a semiconductor device that generates a clock signal with a fixed pulse width from a carrier. The invention also provides a semiconductor device where data can be obtained accurately from a carrier using a clock signal with a fixed pulse width. Further, the invention provides a semiconductor device that has a simpler circuit configuration and a smaller scale, and consumes less power as compared to the PLL circuit. According to the invention, a signal obtained by dividing a carrier including 100% modulation is not used as a clock signal, and a correction circuit is used to generate a clock signal using a demodulated signal and a signal obtained by dividing the carrier including 100% modulation. According to the invention having such a configuration, a clock signal with a fixed pulse width can be generated.
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Citations
25 Claims
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1. A semiconductor device comprising:
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a divider circuit for dividing a carrier; a demodulated signal separation circuit for generating a plurality of demodulated signals using a demodulated signal demodulated from the carrier; and a correction circuit for generating a clock signal using an output signal from the divider circuit and the plurality of demodulated signals supplied from the demodulated signal separation circuit. - View Dependent Claims (6, 7, 8, 9, 22)
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2. A semiconductor device comprising:
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a divider circuit for dividing a carrier; a demodulation circuit for generating a demodulated signal using the carrier; a demodulated signal separation circuit for generating a plurality of demodulated signals using the demodulated signal; and a correction circuit for generating a clock signal using an output signal from the divider circuit and the plurality of demodulated signals supplied from the demodulated signal separation circuit. - View Dependent Claims (10, 11, 12, 13, 23)
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3. A semiconductor device comprising:
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a divider circuit for dividing a carrier; a demodulation circuit for generating a first demodulated signal using the carrier; a demodulated signal separation circuit for generating from the first demodulated signal a second demodulated signal obtained by amplifying the first demodulated signal, a third demodulated signal obtained by separating only a first pulse from the first demodulated signal, and a fourth demodulated signal obtained by separating pulses other than the first pulse from the first demodulated signal; and a correction circuit for generating a clock signal using an output signal from the divider circuit, the third demodulated signal and the fourth demodulated signal. - View Dependent Claims (14, 15, 16, 17, 24)
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4. A semiconductor device comprising:
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a divider circuit for dividing a carrier; a demodulation circuit for generating a first demodulated signal using the carrier; a demodulated signal separation circuit for generating from the first demodulated signal a second demodulated signal obtained by amplifying the first demodulated signal, a third demodulated signal obtained by separating only a first pulse from the first demodulated signal, and a fourth demodulated signal obtained by separating pulses other than the first pulse from the first demodulated signal; a demodulated signal generating circuit for generating from the third demodulated signal and the fourth demodulated signal a fifth demodulated signal obtained by delaying the fourth demodulated signal; and a correction circuit for generating a clock signal using an output signal from the divider circuit and the fifth demodulated signal. - View Dependent Claims (5, 18, 19, 20, 21, 25)
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Specification