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US 2010/0061483 A1Published application
Pulse radio transmission apparatus and transceiver
AssigneeFujitsu Limited
InventorYasuhiro NAKASHA
Life of this patent
Estimating the term…
Abstract
A radio transmission apparatus has a first duty adjustment circuit which changes a duty of a clock signal, a second duty adjustment circuit which changes the duty of the clock signal to a duty different from the duty of the clock signal changed by the first duty adjustment circuit, a first AND circuit which takes a logical product between a data signal and the clock signal having passed through the first duty adjustment circuit, and a second AND circuit which takes a logical product between an output signal of the first AND circuit and the clock signal having passed through inversion of the output of the second duty adjustment circuit to generate a pulse signal.
Claims20
A radio transmission apparatus comprising:
- a first duty adjustment circuit which changes a duty of a clock signal;
- a second duty adjustment circuit which changes the duty of the clock signal to a duty different from the duty of the clock signal changed by the first duty adjustment circuit;
- a first AND circuit which takes a logical product between a data signal and the clock signal having passed through the first duty adjustment circuit;
- and
- a second AND circuit which takes a logical product between an output signal of the first AND circuit and the clock signal having passed through inversion of the output of the second duty adjustment circuit to generate a pulse signal.
2 more elements
A radio transmission apparatus comprising:
- a duty adjustment circuit which changes a duty of a clock signal;
- a first AND circuit which takes a logical product between a data signal and the clock signal;
- and
- a second AND circuit which takes a logical product between an output signal of the first AND circuit and the clock signal having passed through the duty adjustment circuit to generate a pulse signal.
1 more element
A transceiver comprising:
- a base-band signal generator which generates a base-band signal;
- a radio transmitter which converts the base-band signal into a pulse train;
- a first band-pass filter which limits a band of the generated pulse train;
- a transmission amplifier which amplifies the pulse train having passed through the first band-pass filter;
- a reception amplifier which amplifies a signal received from an antenna;
- a switch which performs changeover between transmission of the pulse train from the transmission amplifier, to the antenna, and transmission of the signal received from the antenna, to the reception amplifier;
- a second band-pass filter which limits a band of the signal having passed through the reception amplifier;
- a wave detector which detects the signal having passed through the second band-pass filter;
- and
- a regenerator which regenerates the base-band signal from the detected signal;
- wherein the radio transmitter includes:
- a first duty adjustment circuit which changes a duty of a clock signal;
- a second duty adjustment circuit which changes the duty of the clock signal to a duty different from the duty of the clock signal changed by the first duty adjustment circuit;
- a first AND circuit which takes a logical product between a data signal and the clock signal having passed through the first duty adjustment circuit;
- and
- a second AND circuit which takes a logical product between an output signal of the first AND circuit and the clock signal having passed through inversion of the output of the second duty adjustment circuit to generate a pulse signal.
13 more elements
A transceiver comprising:
- a base-band signal generator which generates a base-band signal;
- a radio transmitter which converts the base-band signal into a pulse train;
- a first band-pass filter which limits a band of the generated pulse train;
- a transmission amplifier which amplifies the pulse train having passed through the first band-pass filter;
- a reception amplifier which amplifies a signal received from an antenna;
- a switch which performs changeover between transmission of the pulse train from the transmission amplifier, to the antenna, and transmission of the signal received from the antenna, to the reception amplifier;
- a second band-pass filter which limits a band of the signal having passed through the reception amplifier;
- a wave detector which detects the signal having passed through the second band-pass filter;
- and
- a regenerator which regenerates the base-band signal from the detected signal;
- wherein the radio transmitter includes:
- a duty adjustment circuit which changes a duty of a clock signal;
- a first AND circuit which takes a logical product between a data signal and the clock signal;
- and
- a second AND circuit which takes a logical product between an output signal of the first AND circuit and the clock signal having passed through the duty adjustment circuit to generate a pulse signal.
12 more elements
Dependencies are inferred from the claim text.